* Maintenance: Regular oil changes, filter replacements, and other scheduled maintenance are crucial. Neglecting maintenance drastically shortens engine life.
* Driving habits: Aggressive driving, frequent hard acceleration and braking, and towing heavy loads put extra stress on the engine.
* Climate: Extreme temperatures (both hot and cold) can affect engine performance and longevity.
* Quality of fuel and fluids: Using low-quality fuel or fluids can damage engine components.
* Previous repairs and accidents: An engine that's been previously damaged might have a shorter lifespan.
While some GMC Jimmys might reach 200,000 miles or more with proper care, others could fail much sooner due to any of the factors above. There's no guaranteed mileage before engine failure.
