A few common causes are low or dirty transmission fluid, or faulty shift solenoids. The transmission uses fluid pressure to shift the gears, and does so using electronic solenoids. If there is an issue with either of these the vehicle may experience problems shifting or transferring power to the wheels. If these are not the problem then it could be possible that the transmission is having internal faults, perhaps a worn torque converter, or transmission gears, inside of the transmission. As issues like these can sometimes be difficult to diagnose, if you are unsure, I would recommend having a professional technician look ay it.
Pictures are fine on this website
Here a a few Support Brackets. It sounds like it is to hold front end bodywork trim or an under engine splash cover.
https://www.google.com/search?q=1988+GMC+Safari+support+bracket
.. Picture of a picture below. click the Photos Icon, and click Upload. Navigate to where it is on your computer.
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.
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.
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.
Have you had the vehicle plugged into an OBD2 scanner to look for trouble codes? This will give more clues as to what this issue could be. If you have to pay for this ask at 4 or 5 places as prices can be VERY different.
Simply "throwing" parts at the problem is a Very expensive way to work. Comment below with the codes and I'll see if I can help you more.
If your vehicle's air conditioning system intermittently switches from blowing cold air to hot air, there could be a few possible causes for this issue. Here are some potential reasons:
1. Low refrigerant levels: Insufficient refrigerant can lead to inconsistent cooling performance. When the refrigerant level drops, the system may blow cold air initially but eventually switch to blowing hot air. This could be due to a refrigerant leak or a problem with the AC system's components. A professional AC service technician can check the refrigerant levels and locate any potential leaks.
2. Faulty blend door actuator: The blend door actuator is responsible for directing airflow through different vents. If the blend door actuator malfunctions or gets stuck, it may cause uneven airflow distribution, resulting in cold air on one side and hot air on the other. Replacing the faulty actuator should resolve the issue.
3. Control module or sensor malfunction: The AC system relies on various sensors and control modules to regulate temperature and airflow. If any of these components malfunction, it can cause erratic cooling behavior. A diagnostic scan by a qualified technician can identify any faulty sensors or control modules that need to be repaired or replaced.
4. Electrical or wiring issue: In some cases, electrical or wiring problems can cause intermittent AC issues. Loose connections, damaged wires, or faulty relays can disrupt the proper functioning of the AC system, leading to inconsistent cooling performance. A thorough inspection of the electrical system by a professional is necessary to identify and resolve any wiring issues.
Given the complexity of diagnosing and repairing automotive AC systems, it is recommended to take your vehicle to a qualified mechanic or AC specialist. They have the necessary tools, knowledge, and experience to diagnose the specific issue and perform the required repairs to restore consistent cooling performance in your truck.
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.
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
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.
