Early on, the GMC Jimmy really didn't have to try that hard to capture the marketplace. Alongside its corporate brothers, the Jimmy's very size and nature appealed to the same kind of people who buy SUVs today. By the late 1990s, though, a new wave of crossover SUVs were starting to encroach on the Jimmy's niche, forcing GMC to drastically expand the number of trim levels and chassis and drivetrain options. The Jimmy's everyman approach helped this seminal mid-sized SUV put up the good fight for several years; ultimately, though, the Jimmy joined the ranks of so many other capable and beloved nameplates relegated to history.
Instructions
- 1
Start the truck's engine and allow the coolant temperature to reach at least 120 degrees Fahrenhiet; this heat will facilitate oxygen sensor removal.
2Set the Jimmy's parking brake, raise the front with a floor jack and set it on jack stands. Locate the bad sensor. The upstream sensor -- Sensor No. 1 -- is in the exhaust manifold, and Sensor No. 2 -- the downstream sensor -- is in the exhaust pipe after the catalytic converter.
3Disconnect the bad sensor's wiring plug. Use a ratchet and oxygen sensor socket to remove the sensor. Coat the threads of the new oxygen sensor threads with antiseize compound, and screw the sensor into the hole.
4Use a torque wrench to tighten the sensor to 30 foot-pounds and plug the wiring harness in. Lower the vehicle and test drive it. If the check-engine light doesn;t turn off, take the truck to a shop or an auto parts store, and use the available OBD-II scanner to delete the stored diagnostic codes.
