GMC Cars & Trucks - Page 9 - Popular Questions, Answers, Tips & Manuals

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How do I re sync the sunroof after installing a new motor and switch on a 2011 GMC 3500 crew cab?

The procedure you are following seems to be the correct one for resyncing the sunroof after a motor replacement on a 2011 GMC 3500 crew cab. However, there could be a few reasons why the procedure is not working for you:
  1. Incorrect installation of the new motor: Double-check that the new motor has been installed correctly and that all the electrical connections are secure.
  2. Faulty switch: The new switch you installed may be faulty, preventing the sunroof from syncing. Try using a different switch to see if that resolves the issue.
  3. Motor calibration: The new motor may need to be calibrated before it can sync with the sunroof. You may need to consult the vehicle's manual to determine the exact calibration procedure for your specific make and model.
  4. Mechanical obstruction: Check for any mechanical obstructions that may be preventing the sunroof from moving correctly. There could be debris or an object blocking the sunroof's tracks or preventing the motor from functioning correctly.
If you are still unable to sync the sunroof after trying these steps, you may need to consult a professional mechanic or bring your vehicle to a dealership for further assistance.
2/19/2023 8:52:36 PM • GMC Cars &... • 82 views • 0 helpful votes
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Can't find the radio fuse 1994 GMC Sierra?

Three fuses. Press CTRL+F and type 'radio', press enter. https://www.autogenius.info/gmc-sierra-mk1-1993-1994-fuse-box-diagram/ ..
2/21/2023 6:33:50 PM • GMC Cars &... • 76 views • 0 helpful votes
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Does the 1991 GMC Sierra 2500 have a starter relay ignition modual

NO VIN told so>? C2500 or K2500, Sierra is trim. a PICKUP truck>? Not a Suburban right? most cars made have starter relay so the super expensive ignition switch does not burn up ST contacts. and cars GAS have ignition module, only location changes (if a Distributor it's there) if not Dizzy it's in the ECU or on some cars fire wall to COP coils. 1991 C2500 guess a Pickup is it? 4.3L engine, sorry not doing all 5 engines and diesel shows distributor and ICM and 1 coil. and no relay starter see schem. try here>? https://eautorepair.net/Marketing/Default.asp 4.3L 91-undefined-undefined-0_1.jpg
2/8/2023 11:38:43 AM • GMC Cars &... • 106 views • 0 helpful votes
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I changed my battery on my truck 2004 gmc envoy xuv now my trunk won't open or unlock but the window does go down and up can anyone advise plz thanks?

It is possible that the battery change may have disrupted the electrical system of your GMC Envoy XUV and caused a problem with the trunk latch mechanism. Here are a few things you can try to resolve the issue:
  1. Check the fuse: The trunk release mechanism may be controlled by a fuse. Check the fuse box and replace any blown fuses.
  2. Check the trunk release button: Make sure the trunk release button inside the vehicle is working properly. If it doesn't work, try resetting the power to the vehicle by disconnecting the battery for a few minutes and then reconnecting it.
  3. Check the trunk lock mechanism: Inspect the trunk lock mechanism to see if there is any visible damage or debris that may be preventing it from unlocking.
  4. Check the trunk latch mechanism: Sometimes the trunk latch mechanism can become stuck or jammed. Try lubricating it with a penetrating oil to see if that helps.
  5. Try the key: If your GMC Envoy XUV has a keyed trunk release, try using the key to open the trunk.
If none of these steps resolve the issue, you may need to take your vehicle to a professional mechanic for further diagnostics and repairs.
2/7/2023 1:24:13 AM • GMC Cars &... • 97 views • 0 helpful votes
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Does the generator battery control module on a 2008 GMC Envoy require programming?

Yes, the generator battery control module on a 2008 GMC Envoy requires programming.
2/4/2023 3:11:20 AM • GMC Cars &... • 101 views • 1 helpful votes
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A 2004 GMC envoy XL will not go over idle RPMs

If your 2004 GMC Envoy XL is not going over idle RPMs, there are several potential causes. Here are some steps you can take to troubleshoot and fix the issue:
  1. Check for a vacuum leak: A vacuum leak can cause the engine to not rev beyond idle RPMs. Inspect the vacuum lines and hoses for any signs of damage or cracks, and replace any damaged components.
  2. Check the throttle body: The throttle body may be dirty or malfunctioning, causing the engine to not rev properly. Remove the throttle body and clean it thoroughly, or replace it if necessary.
  3. Check the air intake system: A clogged air filter or dirty mass airflow sensor can cause the engine to not rev properly. Replace the air filter and clean the mass airflow sensor.
  4. Check the fuel system: A clogged fuel filter or failing fuel pump can cause the engine to not rev properly. Replace the fuel filter and test the fuel pump to ensure it is functioning properly.
  5. Check the electronic throttle control system: A malfunctioning electronic throttle control system can cause the engine to not rev properly. Have the system diagnosed by a qualified mechanic and replace any faulty components.
If you are unsure about any of these steps, or if the issue persists after attempting to troubleshoot, it's best to take your vehicle to a qualified mechanic for diagnosis and repairs.
2/20/2023 4:15:56 AM • GMC Cars &... • 64 views • 0 helpful votes
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02 gmc envoy why is she leaning to dr side?

There could be several reasons why your 2002 GMC Envoy is leaning to the driver's side, such as worn or damaged suspension components, a broken spring, or a problem with the air suspension system (if equipped). It's best to have a mechanic inspect the vehicle to determine the exact cause of the problem.
2/14/2023 12:10:35 PM • GMC Cars &... • 72 views • 1 helpful votes
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97 gmc pu 2500 cranks will not start. IK put in a new crankshaft and cam (sensor?) new Cab (CAP)new rotor, new coil new ICM still will not start.

ever see the truck run perfect before, or not in 10 years? C2500 right not k2500 ,pickup. NO ENGINE told ,4 engines 3 gas 1diesel. but is gas so 4 engine not told (no fun there, blind) 4.7 to 5.7L and 5.4L gas. crankshaft and cam forgot to say sensor? CAB means distrib CAP . rotor sure. why not new SPARK PLUGS first and for sure those ratty old HV spark wire, useless, I run NGK mag wires. battery good, cranks fast and engine spins fast and does not start. and engine compression is good and we test that spark is good on all 8 cylinders not just one,all 8 are test and also tested for spark timing. for sure if distributor was removed, or set loose at base and timing lost. if all that is good the engine now runs on spray test fuel in a can. for 3 seconds, even with fuel pump fuse pulled. if you get this far, we check fuel pressure next and even for bad fuel. no history of car told bad fuel ,old rusty tanks wreck injectors. 26 year old truck,. things bad that old are, all fluids and belts fuel filter packed in gunk and rust. thermostat bad. spark parts bad, cap/rotor wire sets x8 and spark plugs. (or timed wrong or put back wrong firing order) injectors clogged, bad fuel or rust in the tank bad FPR, bad map sensor.(or only clogged) or bad fuel pump if pressure is low and FPR not bad. most of my tests all take tools and meters a tech can not fix cars lacking his tools. and skills to use them./ even a timing light is needed on all distrb cars and all EFI cars a fuel pressure gauge. and compression gauge and vacuum gauge.
2/4/2023 5:22:28 AM • GMC Cars &... • 89 views • 0 helpful votes
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What would cause my 05 GMC ENVOY TRANSMISSION TO NOT WANT TO CHANGE GEARS ALSO THE RPMS REV HIGH AND TRUCK WONT HO OVER 60 MILES PER HOUR WHAT CAN BEVTHE PROBLEM?

There could be several issues that could cause your GMC Envoy's transmission to not shift gears properly and the RPMs to rev high. Here are a few potential problems that you may want to consider:
  1. Low transmission fluid: If the transmission fluid is low, it could cause problems with the shifting mechanism. You'll want to check the transmission fluid level and add more if needed.
  2. Faulty shift solenoid: The shift solenoid is responsible for directing transmission fluid to the appropriate gear. If the solenoid is faulty, it could cause shifting problems.
  3. Worn transmission bands or gears: If the transmission bands or gears are worn, it could cause the transmission to not shift properly and the RPMs to rev high.
  4. Clogged transmission filter: A clogged transmission filter can restrict the flow of transmission fluid, causing shifting issues.
  5. Faulty transmission control module (TCM): The TCM is responsible for controlling the transmission. If it's not functioning properly, it could cause shifting problems.
I would recommend having a mechanic diagnose and fix the problem for you. It's important to address transmission issues promptly, as they can lead to further damage if left unchecked.
1/7/2023 10:06:46 PM • GMC Cars &... • 180 views • 0 helpful votes
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2004 GMC Yukon. It doesn't start after installing a fuel pump, fuel canister filter, and fuel regulator. I don't know what else it could be? I need help!

Question edited for clarity. Question moved to model category. Did you disconnect the battery when you did the fuel pump? Did you reset the alarm and engine immobilizer? Did you check for Diagnostic Trouble Codes?
2/22/2023 9:24:26 PM • 2004 GMC Yukon • 55 views • 0 helpful votes
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1998 GMC Sonoma. How to fix wiring to a tail light on it please?

Fixing the wiring to a tail light on a 1998 GMC Sonoma typically involves a few steps. Here's a general guide on how to fix the wiring:

Check the Bulb: Start by checking the bulb. If the bulb is burnt out, replace it with a new one. If it's still not working, move to the next step.

Check the Fuse: Check the fuse for the tail lights in the fuse box under the hood or in the cab. If the fuse is blown, replace it with a new one of the same amperage.

Inspect the Wiring: Inspect the wiring between the tail light and the fuse box for any damage or breaks. If there's damage, you may need to replace the wiring.

Test the Circuit: Use a test light or a multimeter to test the circuit. Start by connecting the test light or multimeter to the positive wire (usually red) and then touch the negative wire (usually black). If the test light illuminates or the multimeter shows a reading, the circuit is working.

Check the Ground: Check the ground wire (usually black) for any damage or breaks. If there's damage, you may need to replace the ground wire.

Fix the Wiring: If you find any damaged or broken wiring, repair it using wire connectors or electrical tape.

Reassemble: Once the wiring is fixed, reassemble everything and test the tail lights.

If you're not comfortable working with wiring or if the issue is not resolved after these steps, it's best to take the vehicle to a qualified mechanic or electrician for further diagnosis and repair.
2/22/2023 12:53:40 AM • 1998 GMC Sonoma • 54 views • 0 helpful votes
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1990 GMC Chevy Sierra. Fuse for trailer lights connector on it please?

Question edited for clarity. Question moved to model category. Strange, I already answered this, but my answer vanished. There are two fuses and a relay. Open the link and press CTRL+F, in the box top right type 'trailer' and press enter. It will highlight the word.

GMC C-Series mk2 (Second Generation; 1999) - fuse box ...

https://www.autogenius.info > gmc-c-series-mk2-secon... Nov 12, 2016 - GMC C-Series mk2 (Second Generation; 1999) - fuse box diagram. Year of production: 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, ...
2/3/2023 3:33:29 AM • 1990 GMC Sierra • 81 views • 0 helpful votes
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2003 GMC EnvoyXL. Unknown driver any fixes I haven't tried?

check and test bcm which is located under drivers side rear seat fold it up and unit and harnesses are mounted on floor sometimes get damaged or corrosion--------- https://www.trailvoy.com/threads/unknown-driver-gauges-crazy-etc.100835/ -------------https://www.trailvoy.com/threads/not-solved-unknown-driver-no-p-lock-p-wind-radio-etc.143065/--------https://www.trailvoy.com/threads/not-solved-unknown-driver-no-p-lock-p-wind-radio-etc.143065/ --------file:///C:/Users/john/Downloads/Service%20Bulletin%201551460%20(3).pdf
1/18/2023 7:58:43 PM • GMC Cars &... • 117 views • 0 helpful votes
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GM 4L60-E (Late Style) Automatic Transmission is totally rebuilt with all seals, snap rings, clutches, and gaskets installed, but I put it in and I get no gears. What can I do now?

Question edited for clarity. A set of random letters and numbers doesn't work. Question moved to maker category. Help here. It is a known issue after rebuilds. https://www.google.com/search?q=4l60e+no+gears+after+rebuild
3/4/2023 9:56:20 PM • GMC Cars &... • 39 views • 0 helpful votes
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1996 gmc 6.5l brake line diagram

The brake system on your vehicle consists of hydraulic lines that run from the master cylinder to each wheel. The lines are typically made of steel and are routed along the frame rails and body of the vehicle. There are also flexible hoses that connect the brake lines to the brake calipers or wheel cylinders at each wheel. If you need to replace a brake line on your vehicle, it is important to use the correct size and type of line to ensure proper operation of the brake system. The diameter of the brake line is typically 3/16 inch, but it is always best to confirm this by measuring the existing line or consulting the vehicle's service manual. When replacing brake lines, it is important to use a tubing bender to create the necessary bends in the lines. Sharp bends or kinks can cause the brake line to fail, which can lead to a loss of brake fluid and a loss of braking power. If you are not confident in your ability to replace a brake line on your own, I would recommend consulting a qualified mechanic for assistance. They can help you identify the correct brake line to use, and can install it for you to ensure proper operation of your vehicle's brake system.
2/23/2023 11:39:20 PM • GMC Cars &... • 47 views • 0 helpful votes
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Why did the Reduced engine power, engine light and traction control light all come on at once?

Hook up a professional grade scan tool to the vehicles computers an check for DTC'S diagnostic trouble codes , that will tell a professional mechanic what to check.
12/25/2022 4:05:31 PM • GMC Cars &... • 210 views • 0 helpful votes
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My 2004 GMC Envoy SLT will go into four low but not for higher automatic four wheel drive and we'll also go into two wheel drive what's the problem

There are a few potential issues that could be causing your 2004 GMC Envoy SLT to go into 4-low but not 4-high or 2-wheel drive. Some possible causes include:
  1. Transfer case issues: The transfer case is responsible for controlling the engagement of the different drive modes. If the transfer case is damaged or malfunctioning, it may not be able to engage 4-high or 2-wheel drive.
  2. Shift motor issues: The shift motor is responsible for controlling the engagement of the transfer case. If the shift motor is damaged or malfunctioning, it may not be able to engage 4-high or 2-wheel drive.
  3. Vacuum issues: The vacuum system is responsible for controlling the engagement of the transfer case. If there is a problem with the vacuum system, it may not be able to engage 4-high or 2-wheel drive.
  4. Wiring issues: The wiring that controls the transfer case and shift motor can become damaged or corroded over time. This can cause the transfer case to not engage 4-high or 2-wheel drive.
  5. Control module issues: The control module that controls the transfer case and shift motor can fail. This can cause the transfer case to not engage 4-high or 2-wheel drive.
It's best to diagnose the issue by a professional mechanic, who can perform a proper diagnosis and repair the issue. They will be able to determine the specific cause of the problem and recommend the appropriate repairs.
1/12/2023 5:26:05 AM • GMC Cars &... • 123 views • 0 helpful votes
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How to bypass security setting Gmc sonoma 2004

you dont you fix or correct --if lost keys dealer or auto authorized locksmith and have key[s] cut using vin
2/10/2023 2:47:43 PM • GMC Cars &... • 58 views • 0 helpful votes
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