GMC Cars & Trucks - Page 6 - Recent Questions, Troubleshooting & Support
Check gauge light on 1997 1500 truck
First have the computer scanned for trouble codes and as for the gauges first check the fuses and relays then if they are good then you will have to replace the instrument cluster because they are well known for being faulty.
My 99 Gmc jimmy will not start. the fuel pump is
Does it crank or not? If no crank then look at the starter or ignition switch. If crank but no start then look at the ignition system. Check for spark at the plugs and also check the fuel pressure. If there is spark try spraying a little starting fluid into the intake. See if it starts and stays running. If it stays running reply back and I will explain why.
Where is the relay for the back glass release on a 1993 gmc yukon
The back glass release relay on a 1993 GMC Yukon is located in the fuse box under the hood of the vehicle. The exact location of the relay is usually indicated on the inside of the fuse box lid.
To find the back glass release relay, first locate the fuse box under the hood of your 1993 GMC Yukon. Then, locate the relay diagram printed on the inside of the fuse box lid. Look for the relay labeled "back glass release" or something similar.
If you are having trouble locating the relay or if it has burnt out and needs to be replaced, it is recommended that you consult the vehicle owner's manual or take your vehicle to a qualified mechanic for assistance.
1991 GMC C1500, 5.7 liter 350. Why is my A/C and heat are causing my engine to surge?.
If the operation of your A/C and heat is causing your engine to surge in your 1991 GMC C1500 with a 5.7-liter 350 engine, there could be a few possible causes for this issue:
- Engine Load: The A/C and heat systems place an additional load on the engine, especially when the compressor engages. This extra load can affect the engine's idle and cause surging. It's possible that the engine is not able to handle the increased load, leading to fluctuations in RPM.
- Idle Control System: The idle control system, including the idle air control valve (IAC), may be malfunctioning or not compensating properly for the increased load when the A/C or heat is turned on. This can result in unstable idle and engine surging. The IAC valve may need cleaning or replacement.
- Electrical Issues: Faulty electrical connections, such as loose or corroded wires or connectors, can cause intermittent power supply to the A/C and heat systems. In turn, this can lead to fluctuations in engine performance, including surging.
- Vacuum Leaks: Check for any vacuum leaks in the A/C and heat system components, as well as the engine's intake manifold and vacuum lines. Vacuum leaks can disrupt the engine's air-to-fuel ratio, leading to unstable idle and surging.
- A/C Compressor Issues: The A/C compressor itself may be malfunctioning, causing excessive drag on the engine. This can result in surging when the A/C is engaged. A faulty clutch, compressor bearing, or internal component may be the cause.
- Engine Performance Issues: Other underlying engine performance problems, such as ignition system issues, fuel delivery problems, or worn-out engine components, can contribute to surging when the A/C or heat is in use.
To diagnose and resolve the issue, it is recommended to consult a qualified mechanic or an automotive technician who can perform a thorough inspection of your vehicle. They will be able to assess the specific conditions and components involved, perform necessary tests, and identify the root cause of the surging problem.
How to remove a transmission for a 2002 GMC Yukon
Removal & Installation
4L60E/4L65E
To Remove:
- Remove or disconnect the following:
- Transmission fluid
- Transmission oil level indicator tube and seal from the transmission
- Plug the oil level indicator tube opening in the transmission.
- Remove or disconnect the following:
- Shift cable end from the transmission shift lever ball stud
- If equipped with a transfer case, remove the front propeller shaft.
- Rear propeller shaft.
- Plug the transmission oil cooler line connectors in the transmission case.
- Remove or disconnect the following:
- Starter motor.
- Transfer case, if equipped.
- Support the transmission with a transmission jack.
- Remove the transmission mount nuts.
- Remove the transmission crossmember.
- Remove or disconnect the following:
- Torque converter access plug
4L60E/4L65E removal
- Flywheel to torque converter bolts
- The two bolts securing the transmission rear mount to the transmission
- The transmission vent hose, fuel lines, and the wiring harness from the transmission
- The stud and the bolt securing the transmission to the engine
- The six studs and one bolt securing the transmission to the engine. Install tool J21366 onto the transmission bell housing to retain the torque converter. Pull the transmission straight back.
- The transmission from the vehicle
- Flush the transmission oil cooler and cooling lines when you remove the transmission.
To Install:
- Install or connect the following:
- Tool J21366 onto the transmission bell housing to retain the torque converter.
- Support the transmission with a transmission jack.
- Raise the transmission into place and remove the tool from the transmission.
- Slide the transmission straight onto the locating pins while lining up the marks on the flywheel and the torque converter. The torque converter must be flush onto the flywheel and rotate freely by hand.
- Install or connect the following:
- Six studs and one bolt securing the transmission to the engine. Tighten the studs and the bolt to 50 Nm (37 ft. lbs.).
- Stud and bolt securing the transmission to the engine. Tighten the stud and the bolt to 50 Nm (37 ft. lbs.).
- Flywheel to torque converter bolts. Tighten the stud and the bolt to 46 Nm (63 ft. lbs.).
- Torque converter access plug.
- Transmission vent hose, fuel lines, and the wiring harness to the transmission.
- Two bolts securing the heat shield to the transmission. Tighten the bolt to 17 Nm (13 ft. lbs.).
- Two bolts securing the transmission rear mount to the transmission. Tighten the bolts to 18 ft. lbs. (25 Nm).
- Install the transmission crossmember. Tighten the nuts and bolts to 70 ft. lbs. (95 Nm).
- Remove the transmission jack from the transmission.
- Unplug the transmission oil cooler line connectors in the transmission case.
- Install or connect the following:
- Starter
- Transmission oil cooler lines to the transmission
- If equipped with a transfer case, install the front propeller shaft.
- The rear propeller shaft
- The shift cable end to the transmission shift lever ball stud
- Unplug the oil level indicator tube opening in the transmission.
- Install the transmission oil level indicator tube and seal to the transmission.
- Tighten the oil pan bolts and fill the transmission with transmission fluid.
- Lower the vehicle.
4L80E/4L85E
To Remove:
- Remove or disconnect the following:
- Transmission fluid
- Transmission oil level indicator tube and seal from the transmission
- Plug the oil level indicator tube opening in the transmission.
- Remove or disconnect the following:
- Shift cable from the transmission shift lever ball stud
- If 4WD vehicle, remove the propeller shaft.
- If RWD vehicle, remove the propeller shaft.
- The transmission oil cooler lines from the transmission
- Plug the transmission oil cooler line connectors in the transmission case.
- Remove or disconnect the following:
- Support the transmission with a transmission jack.
- Remove or disconnect the following:
- The two bolts securing the heat shield to the transmission
- The transmission vent hose, fuel lines, and the wiring harness from the transmission
- One nut and one bolt securing the transmission brace to the engine bracket and transmission
- The two bolts securing the torque converter cover to the engine
- The four bolts securing the torque converter cover to the transmission
- The six flywheel to torque converter bolts
- The two bolts and nut securing the transmission rear mount to the transmission
- The stud and the bolt on the right side securing the transmission to the engine
- The remaining six studs and the one bolt securing the transmission to the engine
- Tool J21366 onto the transmission bell housing to retain the torque converter
4L80E/4L85E removal
- Pull the transmission straight back. Remove the transmission from the vehicle.
- Flush the transmission oil cooler and cooling lines when you remove the transmission.
To Install:
- Install or connect the following:
- Tool J21366 onto the transmission bell housing to retain the torque converter
- Support the transmission with a transmission jack.
- Raise the transmission into place and remove the tool from the transmission.
- Slide the transmission straight onto the locating pins while lining up the marks on the flywheel and the torque converter. The torque converter must be flush onto the flywheel and rotate freely by hand.
- Install or connect the following:
- Six studs and one bolt securing the transmission to the engine. Tighten the studs and the bolt to 50 Nm (37 ft. lbs.).
- The stud and bolt on the right side securing the transmission to the engine. Tighten the stud and the bolt to 50 Nm (37 ft. lbs.).
- Six flywheel to torque converter bolts. Tighten the bolts to 60 Nm (44 ft. lbs.).
- The two bolts securing the torque converter cover to the engine. Tighten the bolt to 50 Nm (37 ft. lbs.).
- The four bolts securing the torque converter cover to the transmission. Tighten the stud and the bolt to 33 Nm (24 ft. lbs.).
- The transmission vent hose, fuel lines, and the wiring harness to the transmission.
- The two bolts securing the heat shield to the transmission. Tighten the bolt to 17 Nm (13 ft. lbs.).
- The two bolts and nut securing the transmission rear mount to the transmission. Tighten the bolts and nut to 25 Nm (18 ft. lbs.).
- The flywheel to torque converter bolts.
- One nut and one bolt securing the transmission brace to the engine bracket and transmission. Tighten the bolts and nut to 50 Nm (37 ft. lbs.).
- Remove the transmission jack from the transmission.
- Install or connect the following:
- Unplug the transmission oil cooler line connectors in the transmission case.
- Connect the transmission oil cooler lines to the transmission.
- Install or connect the following:
- The transfer case
- The rear propeller shaft
- The shift cable end to the transmission shift lever ball stud
- Unplug the oil level indicator tube opening in the transmission.
- Install the transmission oil level indicator tube and seal to the transmission.
- Tighten the oil pan bolts and fill the transmission with transmission fluid.
- Lower the vehicle.
2016 GMC Sierra window and mirror issues
Have you replaced the actual switch panel mounted in the door? If everything else works directly with their own switches it could be the switches you use whilst driving.
I need a wiring diagram for 1976 GMC Jimmy
I'm sorry, but as a text-based AI model, I'm unable to provide visual images or diagrams. However, I can try to explain the general wiring setup for a 1976 GMC Jimmy.
The wiring diagram for a specific vehicle can vary based on the model, trim level, and optional equipment. It's recommended to consult a service manual or reach out to a qualified automotive electrician for accurate and detailed wiring diagrams specific to your vehicle.
In general, the wiring in a 1976 GMC Jimmy would consist of various circuits for different systems such as the ignition system, lighting system, charging system, and more. Here are some common components and circuits you might find:
- Ignition System: This circuit includes components like the ignition switch, ignition coil, distributor, spark plugs, and related wiring. It controls the ignition timing and provides sparks to ignite the fuel-air mixture in the engine.
- Lighting System: This circuit handles the headlights, taillights, brake lights, turn signals, and other exterior and interior lights. It usually consists of a combination of fuses, relays, switches, and wiring harnesses.
- Charging System: The charging system includes the alternator, voltage regulator, battery, and associated wiring. It generates electrical power to charge the battery and provide electricity to the vehicle's electrical components.
I have a 2002 gmc envoy trans went out will a 2001 chevy silverado work if not what will thanks
no ENGINE TOLD AT ALL, SOME NEED HIGHER TORQUE TRANNY
THIS CAR HAS RPO , LIST BASED ON VIN AND TELLS THE 3 DIGIT COLD FOR TRANNY , ALL GM DEALER CAN LOOK UP THAT CODE
must fit and not make the TCM angry.
ask chevy maker for the fits list
or ask any transmission repair shops for the list.
a transmission, has many options by class series number.
even different RATIO'S AND LENGTH, MOUNTS AND TCM CONNECTIONS FUNCTIONS.
EXAMPLES ,NOT SAYING IT IS YOURS, ONLY CAN BE.
SERIES 4L60E (JUST A SERIES ok , UNDER STAND ?)
M30 : TRANSMISSION, AUTO 4 SPD, HMD, 4L60E, ELECTRONIC
NO ENGINE TOLD
NO VIN TOLD SO I CAN GET THE RPO LIST ,BEST IS YOU TELL GM THE VIN AND YOU GET THE RPO.
RPO, IS THE AS BUILT LIST.
THEN SHOP. BY RPO(TRANS) CODE.
2010 gmc sierra RIGHT FRONT signal light staying on
If the right front signal light of your 2010 GMC Sierra stays on even when the truck is shut off, it could be due to a few possible reasons:
1. Stuck Relay: There might be a malfunctioning relay in the turn signal circuit that is causing the right front signal light to remain illuminated. A stuck relay can keep the circuit closed even when the vehicle is turned off. In this case, you may need to have the relay replaced or repaired.
2. Faulty Wiring: It's possible that there is a wiring issue in the turn signal circuit, causing a constant power supply to the right front signal light. This could be due to a short circuit or a damaged wire. Inspecting the wiring harness and connections for any signs of damage or loose connections would be necessary. If a faulty wire is found, it may need to be repaired or replaced.
3. Malfunctioning Switch: The turn signal switch itself could be defective or stuck in the "on" position. This can cause the right front signal light to remain illuminated regardless of the vehicle's status. Replacing the turn signal switch might be necessary if it is determined to be the cause of the issue.
To pinpoint the exact cause and resolve the problem, it is recommended to have a qualified mechanic or an automotive electrician inspect your GMC Sierra. They will have the expertise and necessary tools to diagnose the issue accurately and carry out the required repairs.
How do I test my ign module on a 1995 GMC Sierra 5.7
To test the ignition module on a 1995 GMC Sierra 5.7, you can follow these steps:
1. Safety Precautions: Ensure the vehicle is in park or neutral with the parking brake engaged. Also, disconnect the negative terminal of the battery to prevent any accidental electrical shock.
2. Locate the Ignition Module: The ignition module is typically mounted on the distributor or in close proximity to it. It is a small, rectangular component with electrical connectors and heat sinks.
3. Inspect the Wiring and Connections: Examine the wiring harness and connectors leading to the ignition module. Look for any signs of damage, corrosion, or loose connections. Ensure all connections are secure and in good condition.
4. Test the Ignition Coil: The ignition module works in conjunction with the ignition coil. You can test the coil by connecting a spark tester to one of the spark plug wires and grounding the tester. Have an assistant crank the engine while you observe if a spark is present. If there is no spark, it may indicate a faulty ignition coil or module.
5. Use a Multimeter: If the ignition coil tests fine, you can use a digital multimeter to test the ignition module. Set the multimeter to the resistance (ohms) setting. Disconnect the electrical connectors from the ignition module and measure the resistance between the appropriate terminals, as specified in the vehicle's service manual. Compare the readings to the manufacturer's specifications. If the resistance values are significantly different from the specified range, the ignition module may be faulty.
6. Consult a Service Manual: It's essential to refer to a detailed service manual specific to your GMC Sierra 5.7 for accurate testing procedures and specifications. The manual will provide step-by-step instructions and values for testing the ignition module.
If you are unfamiliar or uncomfortable with performing these tests yourself, it is recommended to seek assistance from a qualified automotive technician or a GMC dealership. They will have the expertise and specialized equipment to diagnose and repair the ignition system accurately.
This might help
2006 GMC canyon. 3.5 litre. Blows reverse light fuse
easy as eating cherry pie.
wrong fuse there, 1amp is dead wrong, only oem size is allowed
the Reverse feed is shorted.
only where is the conundrum.? sure rear but wear.)
trailer hitch hacks top the cause.
shorted lamps sockets rear
shorted lamps did know they short easy when abused (twisted, by noobs too hard)
or LED upgrades using cheap C-H-I-N-A upgrades, that love to short at the drop of a hat, remove the upgrade that was really a down grade. BOOM
collision damage not fully cured, (endless)
some on hacked up the PRNDL switch and the R pin is shorted.
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