1994 GMC Jimmy Owner's Manual - Page 202

Maintenance When Trailer Towing Your vehicle will need service more often when you're pulling a trailer. See the MaintenanceSchedule for more on this. Things that are especially important in trailer operation areautomatic transmission fluid (don't overfill), engine oil, axle lubricant, belt, cooling system, and brake adjustment. Eachof these is covered in this manual, and the Index will help you find them quickly. you're trailering, it's a If good idea to review these sections beforeyou start your trip. Check periodically tosee that all hitch nuts and bolts are tight. Trailer Light Wiring See "Trailer Wiring Harness" in the Index. Power Winches If you wish to usea power winch on your vehicle, only it when your use vehicle is stationary or anchored. NOTICE: When operating a power winch on your vehicle always leave the transmission in the neutral position. Do not leave an automatic transmission in P (Park) or a manual transmission in gear or the transmission may be damaged. Use the regular brakes, the parking brake or block the wheels to set keep your vehiclefrom rolling.