Jan 242020
 

2016-chevy-traverse

Transmission seems to “stutter” at 20-25 ph and 40-45 ph



If I had to guess I would say that the transmission was serviced with the wrong type of transmission fluid. They do sell a corrective additive called Shudder Fix. However the better course of action would be to have the transmission fluid replaced with the correct type. There is a TSB – Technical Service Bulletin out on this issue.

TSB# 16-NA-175

TSB 16-NA-175 Description

Shake and/or shudder during light acceleration between 25 and 80 MPH at a steady state. (June5, 2018)

Condition

Some customers may comment on any of the following conditions:

  • A shake and or shudder during light acceleration between 25 and 80 mph steady state driving when transmission is not actively shifting gears.
  • A shudder feeling that may be described as driving over rumble strips or rough pavement.
  • Shudder feeling is evident in both Drive and M7 MY15-16 &L7 MY17 and MY18 Mode.
Diagnosis Instructions

To ensure TCC Shudder is diagnosed correctly, please drive the following schedule on a smooth road with transmission sump temperature between
122°F (50°C) – 158°F (70°C).
Important: For some road conditions, it may be required to apply the brake pedal and throttle simultaneously to stay within desired gear, engine
firing mode, engine torque range, and engine/vehicle speed ranges.

For Full Size Trucks/SUVs– Press and hold the tow-haul mode button for 5 seconds to disable grade braking to prevent downshifts during test.

Run the following tests for 3 operational modes:
A. Normal Operation (GDS2 for viewing only).
B. GDS2 Commanding TCC in Disabled Operation. (TCC Open).
C. GDS2 Commanding TCC in Enabled Operation. (TCC Locked).

To confirm TCC Shudder, the vibration concern must be created in normal operation (Mode A) of the test.

If the concern is gone with the torque converter clutch disabled (Mode B, TCC Open) and is gone with torque converter clutch enabled (Mode C, TCC Locked), then the vibration root cause is TCC Shudder, and the fluid flush procedure corrective action described below should be performed.
If the concern is not present in Mode A, then the vibration concern is NOT TCC shudder.

If the concern is still present with the torque converter clutch disabled (Mode B) or with the torque converter clutch enabled (Mode C, TCC slip speed at zero), then the vibration root cause is NOT TCC Shudder.
Vibrations not identified as TCC Shudder should be further investigated using the Vehicle Vibration Diagnosis in SI as a starting point.

Service Procedure

Important:
Requires Mobil 1 Synthetic LV ATF DEXRON HP transmission fluid.
Note: U.S. dealers must order the Mobil 1 Synthetic LV ATF DEXRON HP
fluid through your local General Motors oil distributor. When contacting
the General Motors oil distributor request Mobil 1 Synthetic LV ATF DEXRON HP.
Canadian dealers must order part number 19355657 through Kem Krest Canada.
1. Drain, Clean pan/magnet, Replace Filter, Oil Fill, & Remove fluid from the oil cooler lines.
◦ A.) Use filtered compressed air regulated to 60 psi to remove transmission fluid from the transmission oil cooler lines.
◦ B.) Remove the transmission fluid pan and drain transmission fluid following SI procedures for the application you’re working on. Discard
all oil.
Note: If you find that the fluid is cloudy, milky, or appears to be contaminated with water or engine coolant, DO NOT proceed with below steps. Follow Both SI Procedures for “Cooling System Leak Testing” and “Engine Coolant/Water in Transmission.”
◦ C.) Clean the pan/magnet if any metallic particles present and replace transmission filter.

Install the transmission fluid pan and refill with new Mobil 1 Synthetic LV ATF DEXRON HP transmission fluid following the Fluid Fill Procedure in SI
to obtain correct fluid level. The shudder should be improved after the completionof this flush procedure.
Note: Shudder should improve directionally right away, but for full affect, the vehicle may need to be driven up to 200 miles (322 km) and a minimum of two cold to hot drive cycles before determining if the fluid flush corrected the condition or not. Do not re-evaluate vehicle for additional customer shudder concerns until the vehicle has been driven 200 miles (322 km).

Jan 162020
 

Chevy C1500

No brake lights but do have the turn signal lights so it’s not the bulb. I thought it was the switch and bought one. Went to install it but my 73 yr joints don’t bend like they used to. Today I noticed when I apply the brakes with cruise control on it disengages. So it must not be the switch. Next, I’ll check the connection between cab and bed. Hope that’s it but I figured I check with here first.



There is a Stop Light Relay in the circuit that you might want to check. It is much easier to swap out and test. It is located in the underhood fuse/relay center. It is pretty common for the relays to fail. The relay is activated by the brake light switch. So if the brake light switch is good and the wiring, the next step would be to check the brake light relay and Fuse #2(30 amp).

1995 Chevy 1500 Stop Light Relay wiring diagram

1995-chevy-1500-stop-light-relay-wiring-diagram

Jan 162020
 

Chevy C1500

Truck won’t upshift from 1 to 2 without taking my foot off of the gas then it shifts normally, up and down. Kicks into passing ok. Don’t think there is a vacuum modular on this model.



This is an electronic solenoid valve body. The VSS – Vehicle Speed Sensor and Throttle signals are used to determine shift points. There may be an issue with the shift valve also. You should check to see if any codes are stored and post the codes if any are present.

Possible code set: P0751

Chevy Code P0751: 1-2 Shift Solenoid Valve Performance

Code P0751 Description

The 1-2 shift solenoid (SS) valve controls the fluid flow acting on the 1-2 and 3-4 shift valves. The solenoid is a normally-open exhaust valve. With the 2-3 SS valve, the 1-2 SS valve allows four different shifting combinations.

When the VCM detects a 1-1-4-4 or a 2-2-3-3 shift pattern, depending on the state of the mechanical failure, then DTC(Diagnostic Trouble Code) P0751 sets. DTC P0751 is a type A DTC.

Conditions for Running the DTC

  • No TP sensor DTC P0122 or P0123
  • No VSS assembly DTC P0502 or P0503
  • No TCC solenoid valve DTC P0740
  • No TCC stuck ON DTC P0742
  • No 1-2 Shift Solenoid Valve DTC P0753
  • No 2-3 SS valve DTC P0758
  • No 3-2 SS valve assembly DTC P0785
  • No TFP manual valve position switch DTC P1810
  • No TCC PWM solenoid valve DTC P1860
  • The gear range is D4
  • The vehicle speed is greater than 5 mph
  • The TP angle is 10-35%
  • The TP angle is constant within +/- 7%
  • The VCM commands a 1-2, 2-3 and 3-4 shift
  • The TCC is commanded ON
  • The engine speed is greater than 450 RPM for 5 seconds
  • The transmission fluid temperature is 68-266F Degrees
  • The engine is not in fuel cutoff

1999-chevy-1500-code-p0751-2

Code P0751 Testing

1999-chevy-1500-code-p0751-test-chart

Jan 032020
 

Chevy Trailblazer

I HAVE AN ENGINE CODE P1481 , FAN SEE LOW WITH HIGH FAN ON… I ASSUME THIS RELATES TO ENGINE FAN… POSSIBLE FAN CLUTCH… IS THIS A CORRECT ASSUMPTION…



First to answer the question, your assumption is correct. I have provided a description and testing procedures below.

Chevy Code P1481 – Cooling Fan Speed Sensor Circuit

Chevy Code P1481 Circuit Description

The powertrain control module (PCM) uses the cooling fan speed signal in order to determine the actual fan speed in relation to the desired fan speed. It uses the cooling fan speed signal in order to reduce the cooling fan noise and in order to maintain the powertrain cooling requirements. The PCM supplies power and ground to the clutch hall effect sensor of the cooling fan clutch. The hall effect sensor returns a signal pulse through the speed signal circuit in response to the reluctor track, which is located inside the fan clutch. If during operation, the PCM detects a loss of the cooling fan speed signal, Diagnostic Trouble Code (DTC) P1481 will set.

Conditions for Running the DTC
  • The engine is running.
  • System voltage is greater than 8.5 volts.
Conditions for Setting the DTC
  • PCM has detected a loss of cooling fan speed signal.
  • The above condition is present for at least 11 seconds.
Action Taken When the DTC Sets
  • The PCM will illuminate the malfunction indicator lamp (MIL) during the second consecutive trip in which the diagnostic test has been run and failed.
  • PCM will store the condition as Freeze Frame/Failure Records data.
  • The PCM commands the cooling fan clutch to 100%.
Conditions for Clearing the MIL/DTC
  • The PCM turns OFF the malfunction indicator lamp (MIL) after the third consecutive trip that the diagnostic test has run and passed.
  • The history DTC will clear after 40 consecutive warm-up cycles have occurred without a malfunction.
  • Clear the DTC by using the Clear DTC Information function of the scan tool .
Diagnostic Aids
  • An inline connector could cause an intermittent DTC. Ensure to test for poor connections and pin retention at all inline connectors. Refer to system schematics for connector and locations.
  • If the condition is not present, refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.
  • Disconnect the harness connector of the cooling fan clutch from the shroud. Inspect the exposed wires between the harness connector and the tubing.
  • Inspect the cooling fan clutch harness in order to ensure that the clutch supply voltage circuit is not shorted to the following circuits: The 5-volt reference circuit. The cooling fan speed signal circuit. The low reference circuit.
  • DTC P1481 will set if the engine is started without the drive belt ON.
Test Description

The numbers below refer to the step numbers on the diagnostic table.

2. Tests that the PCM receives a cooling fan speed signal through the cooling fan speed signal circuit. If answer to question is Yes, ensure to refer to all Diagnostic Aids.

3. Tests for the proper operation of the clutch hall effect sensor.

4. Tests for the proper operation of the 5-volt reference circuit and of the low reference circuit of the cooling fan.

DTC P1481

Step Action Values Yes No

Schematic Reference:Engine Heating/Cooling Schematics

Connector End View Reference: Cooling System Connector End Views

1

Did you perform the Engine Cooling Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check – Engine Cooling

2

  1. Install a scan tool.
  2. Start the engine.
  3. With the scan tool, observe the Fan Speed parameter in the PCM ENG 3 data list.

Does the scan tool indicate that the Fan Speed parameter is within the specified range?

550–800 RPM

Go to Diagnostic Aids

Go to Step 3

3

  1. Turn OFF the ignition.
  2. Disconnect the cooling fan clutch harness connector at the shroud.
  3. Connect a jumper wire between each of the following circuits:
    • The 5-volt reference circuit
    • The cooling fan speed signal circuit
    • The low reference circuit
  4. Connect a digital multimeter (DMM) to the cooling fan speed signal circuit and ground.
  5. Turn ON the ignition with the engine OFF.
  6. Manually rotate the cooling fan.

Does the DMM voltage change?

0–5 V

Go to Step 10

Go to Step 4

4

  1. Disconnect the jumper wires.
  2. Measure the voltage between the 5-volt reference circuit and the low reference circuit of the cooling fan.

Is the voltage measurement near than the specified value?

5 V

Go to Step 5

Go to Step 7

5

  1. Turn OFF the ignition.
  2. Probe the low reference circuit of the cooling fan clutch with a test lamp connected to battery positive voltage.

Does the test lamp illuminate?

Go to Step 6

Go to Step 9

6

Test the 5-volt reference circuit of the cooling fan clutch for a high resistance, or for an open. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 15

Go to Step 7

7

Test the cooling fan speed signal circuit of the cooling fan clutch for a short to ground, for a high resistance, or for an open. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 15

Go to Step 8

8

Test the cooling fan speed signal circuit of the cooling fan clutch for a short to voltage. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 15

Go to Step 11

9

  1. Disconnect the PCM.
  2. Test the low reference circuit of the cooling fan for a high resistance or for an open. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 15

Go to Step 12

10

  1. Disconnect the jumper wires.
  2. Test the cooling fan speed signal circuit of the cooling fan clutch for an open. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 15

Go to Step 12

11

Inspect for a poor connection at the harness connector of the cooling fan clutch. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 15

Go to Step 13

12

Inspect for poor connections at the harness connector of the PCM. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 15

Go to Step 14

13

Replace the cooling fan clutch. Refer to Fan Clutch Replacement.

Did you complete the replacement?

Go to Step 15

14

Replace the PCM. Refer to Powertrain Control Module Replacement in Engine Controls–4.2L.

Did you complete the replacement?

Go to Step 15

15

  1. Use the scan tool in order to clear the DTCs.
  2. Operate the vehicle within the Conditions for Running in the DTC.

Does the DTC reset?

Go to Step 2

System OK

Fan Replacement Tip – Video

Dec 152019
 

Broke only key in ignition. Drilled out but damaged ignition immobilizer. I have key transponder end.

Need advice on cheaper option. I know I will have to spend money.

1. Buy only ignition immobilizer but it prob won’t communicate with engine (IDK if it needs too). I have key transponder end that should still match engine. OR

2. Buy ignition immobilizer and key combo, which should match with each other, but prob will not communicate with engine.

3. Which is best: Key transponder and engine match, or ignition immobilizer and key match?

Thank you for any advice.



If you damaged the immobilizer, you  are going to need to replace it. If it is still functional, buy a new key and lock cylinder from the dealer and all should be well. The dealer can provide you with an ignition key with transponder that matches as long as you can prove you own the vehicle. Show them a copy of the title, etc.

Ignition Lock Cylinder Replacement

Removal Procedure

CAUTION

If replacing both the ignition lock cylinder and the ignition and start switch, always replace the ignition and start switch first before removing the ignition lock cylinder, as misalignment between the ignition and start switch housing and the ignition and start switch will occur resulting in permanent damage to the ignition and start switch.

1.Disconnect the battery negative cable.

2.Disable the supplemental inflatable restraint (SIR) system.

3.Remove the steering column trim covers.

4.

2008-chevy-hhr-ignition-lock-cylinder-replacement-diagram-1

Turn the ignition lock cylinder to the RUN position.

5.

2008-chevy-hhr-ignition-lock-cylinder-replacement-diagram-2.gif

Note

There are two retainers on the ignition lock cylinder. Depress both retainers to remove the lock cylinder from the ignition and start switch housing.

Depress the first retainer through the ignition and start switch housing access hole (2) with a small allen wrench or similar pick-type tool. The lock cylinder will back out slightly.

6.Depress the second retainer through the ignition and start switch housing access hole (1). The lock cylinder will back out slightly again.

7.Pull the ignition lock cylinder out enough to locate the second retainer in the ignition and start switch housing (2).

8.Depress the second retainer though the ignition and start switch housing access hole (2) a second time. The lock cylinder should release from the housing. If not, the lock cylinder may need to be moved in and out several times to align the retainer correctly in the hole.

9.Remove the ignition lock cylinder from the ignition and start switch housing.

1.

2008-chevy-hhr-ignition-lock-cylinder-replacement-diagram-1

Note

If installing a NEW ignition lock cylinder, refer to Key and Lock Cylinder Coding (1st Design) | Key and Lock Cylinder Coding (2nd Design).

Position the ignition lock cylinder in the RUN position and insert the lock cylinder into the ignition and start switch housing.

2.Rotate the ignition lock cylinder in the ignition and start switch housing to verify proper rotation.

3.Install the steering column trim covers.

4.Enable the supplemental inflatable restraint system (SIR) system.

5.Connect the battery negative cable.

6.Complete a final function check. With the ignition key in the OFF position, verify that the key can be inserted and removed with normal operating effort. Rotate the key through all operating positions and verify that the key rotates with normal operating effort. With the key in the RUN position, firmly pull the key to verify it cannot be pulled out of the ignition lock cylinder. Return the key to OFF position and remove the key. The final function check is complete. If any of the prior checks are not completed successfully, then verify the correct assembly, coding and installation of the lock cylinder and repeat the final function check. If the symptoms repeat, call TAC for assistance.

Key Stuck In Ignition

Ignition Lock, Replace

1. Remove steering wheel.

2. Remove steering column trim covers.

3. Remove theft deterrent control module.

4. Remove inflatable restraint steering wheel module coil.

5. Disconnect ignition lock cylinder solenoid harness connector.

6. Disconnect ignition switch harness connector.

7. Bite into shear bolt at a position offset from center using a suitable hammer and chisel.

8. Tap chisel to rotate and loosen bolt.

9. Ensure lock cylinder is in RUN position. If steering wheel lock bolt is engaged, it may prevent removal of lock cylinder case. If lock bolt is engaged, cut lock cylinder case housing collar at locations outlined (1).

2008-chevy-hhr-ignition-key-lock-replacement

10. Remove ignition lock cylinder case housing from steering column.

11. Reverse procedure to install. Perform theft deterrent system reprogramming as follows:

a. Connect a scan tool to vehicle.

b. Turn ON ignition, with engine OFF.

c. Follow scan tool instructions.

Anti-Theft Deterrent System 2007 Chevy Tahoe

 Auto Repair Questions, Chevy  Comments Off on Anti-Theft Deterrent System 2007 Chevy Tahoe
Dec 112019
 

2007-chevy-tahoe

My truck anti theft deterrent system activated and would not allow car to start. After tinkering with the system 3 days and inspecting parts and wires I had it towed to dealer for diagnostics. The mechanic says I need the theft deterrent module replaced. I asked if the module is the one located around the ignition switch (i have been researching online all weekend and even took panels off to see the part beforehand). He says no it is the entire module that is under the dash. When my fiance asked if it is located behind the radio compartment he said yes.

Well I have researched a lot and only see that there is a theft control module which is by the ignition which ties into I believe the BCM which is located under the drivers dash panel where my parking break release and steering column is.

So what is located behind the radio? Is there some other module I am not seeing? I have a 2007 Chevy Tahoe LTZ 5.3L v8 flex. I feel like I am being lied to and just told any and everything. His responses are very vague and I am someone who wants to know exactly what my money goes to.

The part number he gave me for what he said has to be replaced is in fact the theft control module that attaches to the ignition cylinder. Can someone give me a diagram of the entire Passkey 3 system in a Chevy Tahoe? Is it tied directly to the BCM as I thought? And if that is replaced does it require relearning the key with a scan tool or can the key be relearned by the 10 minute increments relearn method repeating 3 times?



Under replacing Body Control Module (BCM) the Repair Manual states:

This procedure must be performed if the BCM, Passlock sensor or PCM is replaced. If BCM is not properly programmed, it will not control all the features properly.

  1. Ensure battery is fully charged and ignition switch is in the ON position.
  2. Connect a suitably programmed Tech II, or equivalent, scan tool to Data Link Connector (DLC).
  3. Access scan tool “Special Functions” menu and follow scan tool instructions to program BCM.
  4. If BCM fails to accept the program, inspect all BCM connections and ensure scan tool is equipped with latest software.

The PCM, BCM and Passlock sensor all communicate with each other but are separate modules. Theft deterrent programming(see below) must be performed anytime the BCM, PCM or Passlock sensor is replaced.

As for feeling like the dealer is giving you the run around. In most cases the dealership hires a sales rep for their Service Writer position. They are good at selling and usually not skilled mechanics. They rely on what the mechanics diagnosis is for each repair and build an estimate based on what parts are looked up by the mechanic. They then, to the best of their ability, try to explain this to the customer. In most cases they have no idea what is going on with your car or even know what color it is. They are more of a middleman between the customer and the mechanic. I wouldn’t hold there lack of knowledge against them.

Theft Deterrent Control Module Location

Right side of the steering column near the ignition key cylinder

2007-chevy-tahoe-theft-deterrent-control-module-location-diagram

Anti-Theft System Diagnostic Service, Test

A visual inspection must always be performed to confirm the presence of aftermarket components, potential collision damage, or areas of concern.

Most systems use a key with transponder, transponder receiver, transponder module and PCM, BCM or stand alone anti-theft module to control system.

The transponder equipped key is inserted into the ignition cylinder and the ignition switch is turned on. The transponder module wakes up and comunicates with the transponder receiver to determine if the appropriate key was used. If the key matches, the transponder module sends a signal to the PCM authorizing vehicle start. If the key does not match, the vehicle will not start and the security lamp will flash.

If vehicle has had a module replacement, a perimeter reset/module pairing, may be required before anti-theft system will operate correctly.

If vehicle is equipped with tow-away protection, antitheft can be sounded when vehicle is being transported.

Some models may have a anti-theft code recorded in radio, retrieve radio code prior to servicing.

Some models may be equipped with a manufacture assisted satellite anti-theft system. Review vehicle owners guide for more information.

1. Duplicate customer concern.

2. If vehicle is equipped with tow-away protection verify that it is disabled.

3. If vehicle is equipped with a interior motion sensor, verify there is nothing hanging from rear view mirror or coat hangers as this can trigger an anti-theft event.

4. If vehicle is equipped with a interior motion sensor and auxiliary heating system, one system should be deactivated as auxiliary heating system can trigger a anti-theft event.

5. Inspect for aftermarket components, such as a remote start or alarm.

6. Verify that hood, luggage compartment, and all doors are fully closed.

7. Verify battery is at full state of charge. Inspect battery condition and charge batteries, as required. An overcharge condition may also affect anti-theft system operation.

8. Ensure transponder key does not required battery replacement.

9. Inspect related fuses and fusible links.

10. Inspect condition of anti-theft lamp. If lamp is flashing perform following:

a. Remove any signaling devices or magnetic cards from key-chain and attempt to start.

b. Verify concern is present with each vehicle key. If concern related to one key, reprogram key and reevaluate system operation. If concern is still present with only one key, a replacement key is required.

c. Connect a suitably programmed scan tool to vehicle.

d. Perform network test and verify communications.

e. Inspect state of hood, luggage compartment, and all doors to verify showing closed on scan tool.

f. Verify programming of all keys. A system reset and reprogramming of all keys at one time may be required.

g. Retrieve any anti-theft related diagnostic trouble codes (DTCs) and follow appropriate DTC code diagnostics.

Theft Deterrent System Programming

The following procedure must be performed anytime the BCM, PCM or Passlock sensor is replaced.

1. Ensure battery is fully charged and there are no Diagnostic Trouble Codes (DTCs) present.

2. Turn ignition switch from the OFF position to the CRANK position attempting to start the vehicle. Vehicle should start and then stall.

3. After vehicle stalls, leave ignition in the ON position and observe security indicator on instrument cluster.

4. When security indicator turns off, turn ignition switch off and wait 10 seconds.

5. Repeat steps 2 through 4 two more times (3 times total).

6. BCM and PCM will learn the new code on the next start attempt.

I was giving gas but wasn’t speeding up 2001 Chevy Tahoe

 Auto Repair Questions, Chevy  Comments Off on I was giving gas but wasn’t speeding up 2001 Chevy Tahoe
Nov 182019
 

1999 Chevy Tahoe

I was giving gas but wasn’t speeding up

2001 Chevy Tahoe 4×4, have never had any symptoms of transmission issue, slipping, dummy light, etc. before. I hit a raccoon last week. Think impact was more on passenger side of undercarriage. Approximately 1-2 miles after hitting raccoon, I noticed I was giving gas but wasn’t speeding up so,I let off gas and everything seemed to be okay intel I would give gas to speed up. I could hear engine accelerate but transmission didn’t seem to be engaging, so I I let off gas drove about half mile pulled over to check, put in reverse u could hear engine accelerate but no movement, so put back in park shut off to wait for hubby. After about 5 min decided to turn back on put it in gear functioned normally for short distance but then same issue again, engine accelerate but no’s shift, (a mile at most )shut off again waited approximately 5 minutes turned on fine then same issue., so pulled over waited for hubby to come get.

No dash lights ever came on, no burning smell from engine or transmission to indicate getting hot during all this.

No previous warning signs

No previous warning signs to indicate transmission problems ever before this incident, hubby added transmission fluid assuming cause was low fluid ended up not being low so we had to drain back out. Fuses seem to be good. Took pan off didn’t see any shavings or anything. Don’t think burnt out trans because like I said never got hot or anything before or after this incident. I feel has to be related to raccoon accident because I know I didn’t drive more than 2 miles when it started having problems and never had any issues before.

Is there something underneath, plug sensor, etc that could have gotten broken knocked loose from Impact of raccoon.



The transmission cooling lines/hoses are on the passenger side. They may have been bent or kinked and no longer allowing the fluid to flow. This would cause an issue. That would be the first thing to look at and consider as you have already ruled out the possibility of transmission fluid level low.

How to Replace Lower Transmission Cooling Hose

 

Accessory Outlets not working 2003 Chevrolet Tahoe

 Auto Repair Questions, Chevy  Comments Off on Accessory Outlets not working 2003 Chevrolet Tahoe
Nov 072019
 

Chevy tahoe

My cigarette lighter and all of the accessory outlets are not working. I checked the fuses and they are not the problem. Are these all wired together to a junction box, module, or voltage regulator? Can’t charge my phone in the truck….aaarrggghh



Are you sure the charge cord is good?

There are separate fuses for the each outlet including the one in the rear. So make sure you check the appropriate fuse. After looking over the wiring diagram for the accessory outlets and cigar lighter there is a common. The common here would be the ground connection.  If you have a volt-meter you can check for 12 volt positive and 12 volt negative ground at each outlet to determine if the wiring is good or if the outlets are faulty. You can also use a test light if you have one handy to check it as shown in video below.

Accessory Outlet Wiring Diagram

2003-chevy-tahoe-accessory-outlet-wiring-diagram

Using a Test Light to check your accessory power outlets

Cigar Lighter Socket and Removal Tool by Dorman

Odometer display codes 2007 Chevy Colorado

 Auto Repair Questions, Chevy  Comments Off on Odometer display codes 2007 Chevy Colorado
Oct 262019
 

Chevy Colorado

I’m curious where my odometer normally reads it has a strange set of numbers. 13 16 10. I was only a mile and a half or so from home and the last number changed 10 11 12 ending on 13 16 15. Can’t seem to find anything anywhere to tell me what this means. My apologies if this is a stupid question… But hopefully you can tell me what this is and why it’s there. 

Michelle
Camano Island WA

odometer display code



Was unable to locate any information on this as well. I will post it in case someone else has seen it they can respond.

You could try this reset method to see if it clears. Then test to see if it comes back.


Reset Stem Method

1. Turn ignition switch to RUN position, but do not start engine.

2. Press and hold reset stem in lower center of instrument cluster until Oil Life message is displayed.

3. Once alternating OIL LIFE and RESET messages appear in display, press and hold reset stem until several beeps sounds This confirms oil life system has been reset.

4. Turn ignition key to Lock position. If CHANGE/OIL message comes back on when engine is started, engine oil life system has not reset. Repeat procedure.

Alternate Method

1. Turn ignition On, but do not start engine.

2. Fully depress and release accelerator pedal three times within 5 seconds. Several beeps will sound. This will confirm system has been reset.

3. If CHANGE ENGINE OIL lamp flashes for 5 seconds, this indicates system has reset.

4. Turn ignition key to Lock position. If CHANGE/OIL message comes back on when engine is started, engine oil life system has not reset. Repeat procedure.