1994 GMC Jimmy Owner's Manual - Page 314

6. TRANSMISSION SERVICE: Automatic Transmission- Change the transmission fluid and filter every 15,000 miles (25 000 km) if the vehicle is mainly driven under one or more of these conditions: In heavy city traffk. Where the outsidetemperature regularly reaches90°F (32"C) or higher. In hilly or mountainous terrain. Frequent trailer pulling. Uses such as taxi, police, delivery or other commercial service. If the vehicleis not used mainly under any these conditions,change of the fluid andfilter every 30,000 miles (50 000 km). See "Automatic Transmission Fluid"in the Index for more information. Manual Transmission- Transmission fluiddoes not require periodic changing. 7. FUEL FILTER REPLACEMENT* Replace the fuelfilter at the $specified interval or sooner if clogged. 8. SPARK PLUG REPLACEMENT* Replace spark plugs with the type listed in Section See "Specification Charts" in the Index. 6. 9. SPARK PLUG WIRE INSPECTION* Clean wires and inspect for burns, cracksor other damage. Check the wire boot at the fit distributor and at the spark plugs. Replace wires as needed. 10. ENGINE TIMING CHECK AND DISTRIBUTOR CHECK*$ Adjust timing to underhood label specifications. Inspect the inside and outside of the distributorcap and rotorfor cracks, carbon tracking and corrosion. Clean or replace needed. as 11. FUEL TANK, CAP AND LINES INSPECTION*$ Inspect the fuel tank, cap and linesfor damage or leaks. Remove fuel cap, inspect gasket for an evenfiiler neck imprint, and any damage. Replace parts as needed. 12. ENGINE ACCESSORY DRIVE BELT INSPECTION* Inspect belt. Lookfor cracks, fraying, wear, and proper tension. Adjust or replace as needed. *An Emission Control Service $=The California Air Resources Board has determined that the failure to perform this maintenance item will not nullify the emission warranty or limit recall liability prior to completion of vehicle usefullife. General the Motors, however, urges that recommended maintenance services be all performed at the indicated intervals and the maintenance be recorded. 7-8