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1990 GMC Jimmy
Vehicle Summary
The 1990 GMC Jimmy is a robust 4WD SUV with a powerful 5.7L V8 engine delivering impressive performance. This versatile vehicle features a hydraulic brake system and throttle body fuel injection, making it suitable for various terrains and driving conditions. Built in Flint, Michigan, the Jimmy offers a sturdy build with a Class 2E Gross Vehicle Weight Rating and the capability for LPG conversion.
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1990 GMC Jimmy
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Complete Specifications
Known Issues for This Vehicle
Brake fluid leaks
Hydraulic brake systems can suffer from leaks in the brake lines, master cylinder, or calipers, leading to reduced braking efficiency.
Brake fade
Overheating of the brake components can cause a temporary loss of braking power, often due to prolonged use or heavy braking.
Brake pad wear
Brake pads can wear out over time and require regular inspection and replacement to ensure effective braking performance.
Master cylinder failure
The master cylinder can fail, leading to a loss of hydraulic pressure and consequently, a loss in braking power.
Vacuum booster issues
Problems with the brake vacuum booster can result in a hard brake pedal and reduced braking assistance.
Ignition system problems
V-shaped engines, especially older models, may suffer from ignition system issues like worn spark plugs, faulty ignition coils, or distributor problems.
Cooling system failures
V8 engines generate a lot of heat, and cooling system failures can lead to overheating, which can cause severe engine damage.
Oil leaks
V8 engines are prone to oil leaks from valve cover gaskets, oil pan gaskets, and rear main seals.
Fuel delivery problems
Issues with the fuel pump, fuel injectors, or fuel filter can lead to engine performance problems or failure to start.
Lpg conversion issues
If the engine has been converted to run on LPG, there can be problems with the conversion kit, such as leaks, improper installation, or tuning issues.
Intake manifold gasket leaks
The V8 configuration can suffer from intake manifold gasket leaks, which can cause coolant and air leaks, leading to poor engine performance.
Exhaust manifold cracks
Over time, the exhaust manifolds on V8 engines can crack, leading to exhaust leaks and increased engine noise.
Timing chain wear
Older V8 engines can experience timing chain wear, which can lead to engine timing issues and potential engine damage if not addressed.
