Windows, power locks, manual locks, doors, trunk, tailgate, mirrors, power and manual seat controls, seat belts, sunroof, convertible top, glass defects.
N/A
No major problem has been reported
Brake pads, brake rotors, brake calipers, anti-lock braking system (ABS), brake lines, brake master cylinder, brake booster, parking brake, brake sensors, regenerative braking system (if applicable).
The 1991 GMC G1500 has a known issue with the water pump, which can lead to coolant loss and potential overheating. This problem can affect the overall reliability of the vehicle, as overheating can cause significant engine damage if not addressed promptly. It’s important for owners to keep an eye on coolant levels and address any leaks quickly to maintain the van’s performance.
The 1991 GMC G1500 is generally a reliable vehicle, but one key maintenance tip is to replace the fuel filter every 30,000 miles to prevent fuel pump failure. This simple preventative measure can help avoid more significant issues down the road, ensuring the van runs smoothly. Regular maintenance like this is crucial for keeping an older vehicle like the G1500 in good shape.
The 1991 GMC G1500 is generally considered a reliable vehicle, but like any older model, it does have its quirks. One important maintenance tip is to flush the brake fluid every 60,000 miles to keep the braking system in good shape and avoid potential issues. Staying on top of this routine maintenance can help ensure the van continues to run smoothly and safely.
The 1991 GMC G1500 has a known issue with the intake manifold gaskets, which can lead to leaks of coolant or engine oil. This problem can affect the overall reliability of the vehicle, as it may cause engine performance issues or overheating if not addressed promptly. Regular maintenance and timely repairs can help mitigate these concerns and keep the van running smoothly.
The 1991 GMC G1500 has been known to experience engine problems due to internal faults in the distributor. This issue can lead to misfires and poor engine performance, which can be a headache for owners. While it’s a common problem for this model year, regular maintenance and timely repairs can help keep the van running smoothly.
The 1991 GMC G1500 seems to have some reliability issues, particularly with idling problems caused by a vacuum leak in the throttle body gasket. This issue can lead to rough idling or stalling, which might be a bit of a headache if you’re relying on it for daily driving. While it’s a common problem for vehicles of this age, addressing it promptly can help maintain the van’s overall performance.
The 1991 GMC G1500 seems to have some issues with the alternator, which can lead to annoying noises and a dead battery. This problem might leave you stranded if not addressed, so it’s something to keep an eye on if you’re driving or considering buying this model. Overall, while the van has its strengths, the alternator issue is a notable reliability concern.
The 1991 GMC G1500 has a known issue with the distributor shaft O-ring seal, which can lead to oil leaks. While this problem might not be a deal-breaker, it’s something to keep an eye on if you own or are considering buying this van. Overall, addressing this issue promptly can help maintain the vehicle’s reliability.
The 1991 GMC G1500 seems to have a pretty solid reputation when it comes to reliability, especially if you keep up with regular maintenance like servicing the transmission every 30,000 miles. This routine service helps prevent major issues and keeps the van running smoothly. Overall, as long as you stick to the maintenance schedule, the G1500 tends to hold up well over time.
Cruise control, keyless entry system, push-button start, wiper motor, warning lights, power mirrors, interior lighting, exterior lighting, dashboard indicators, electronic parking brake, tire pressure monitoring system (TPMS), alarm and security system, remote engine start, heated and ventilated seats, heated steering wheel, wireless charging pad.
The 1991 GMC G1500 is generally considered a reliable vehicle, but like any older model, it does have its quirks. One important maintenance tip is to flush the brake fluid every 60,000 miles to keep the braking system in good shape and avoid potential issues. Staying on top of this routine maintenance can help ensure the van continues to run smoothly and safely.
Dashboard rattles, squeaks, wind noise, door seals, weather stripping, water leaks, air leaks, excessive road noise, suspension noise, drivetrain noise, exhaust rattles, engine bay noises.
The 1991 GMC G1500 has a known issue with the intake manifold gaskets, which can lead to leaks of coolant or engine oil. This problem can affect the overall reliability of the vehicle, as it may cause engine performance issues or overheating if not addressed promptly. Regular maintenance and timely repairs can help mitigate these concerns and keep the van running smoothly.
No major problem has been reported
The 1991 GMC G1500 has a known issue with the water pump, which can lead to coolant loss and potential overheating. This problem can affect the overall reliability of the vehicle, as overheating can cause significant engine damage if not addressed promptly. It’s important for owners to keep an eye on coolant levels and address any leaks quickly to maintain the van’s performance.
The 1991 GMC G1500 has been known to experience engine problems due to internal faults in the distributor. This issue can lead to misfires and poor engine performance, which can be a headache for owners. While it’s a common problem for this model year, regular maintenance and timely repairs can help keep the van running smoothly.
The world's top supplier of programmed OEM (Original Equipment Manufacturer) Powertrain Control Modules (PCM), Engine Control Modules (ECM), Injection Control Modules (IDM), Body Control Modules (BCM), Transmission Control Modules (TCM), Engine Control Units and all other car control units. With over a decade in the business, we are the most reliable source when it comes to programming services for replacement engine control modules.
Pressure loss on your vehicle? U3576 flags a Stack Differential Pressure Sensor circuit fault—possible HVAC failure. Scan, inspect wiring, replace sensor.
Coolant mixing valve sensor fault lights up on your vehicle—risking overheating. Scan U3575, test the sensor, and promptly reprogram or replace it.
Coolant temperature spikes or no heat in your vehicle? U3574 signals a faulty Coolant Mixing Valve—run a module scan and arrange reprogramming or replace.
Engine overheating or coolant warning on your vehicle? A faulty coolant mixing valve control circuit can cause temp loss—scan, reprogram or replace now.
Temp gauge spikes and overheating on your vehicle? U3572 means Stack Outlet Coolant Temp Sensor 2 circuit fault—scan or replace to prevent engine damage.
Temp gauge spikes and overheating in your vehicle? Faulty Stack Outlet Coolant Temp Sensor 1 can overheat engine—scan circuit and schedule module repair.
Coolant temperature warning on your vehicle? A Stack Inlet Coolant Temperature Sensor Circuit can cause overheating—scan, test and replace/reprogram.
Warning light or loss of power from your vehicle’s Anode Multifunction Valve? It threatens system reliability—scan the code and replace the valve promptly.
Your vehicle flashes U3568—Anode Multifunction Valve control circuit fault, risking loss of function. Scan, test the circuit, then reprogram or replace.
Power loss or boost warning in your vehicle? A faulty Anode Inlet Pressure Sensor 2 circuit can trigger limp mode—scan, test wiring and replace sensor.
Fuel pressure warning on your vehicle? A faulty Anode Inlet Pressure Sensor 1 circuit can cause erratic fuel delivery—scan the code, test the sensor, an…
Hydrogen pressure warning on your vehicle? Faulty Hydrogen Supply Line A Pressure Sensor 2 circuit can cut fuel‑cell output—scan and replace the sensor.