1994 GMC Suburban Owner's Manual - Page 352

Explanation Of Scheduled Maintenance Services Below are explanationsof the services listed in the maintenance charts. lne proper fluidsand lubricants to use are listed in this section. Make sure whoever services your vehicle uses these. All parts should be replaced and all necessary repairs done before you or anyone else drives the vehicle. 1. ENGINE OIL AND OIL FILTER CHANGE* -ALWAYS USE SH ENERGY CONSERVIPG I1 (GASOLINE ENGINE) OR CF-4/SH (DIESEL ENGINE) QUALITY OILS OF THE PROPER VISCOSITY. To determine the preferred viscosity oil for your vehicle's engine (e.g. SAE 5W-30 or I 0W-30), see "Engine Oil" in the Index. 2. CHASSIS LUBRICATION- Lubricate the front suspension, king pin bushings, steering linkage, transmission, and transfer case shift linkage, parking brake cable guides, rear driveline center splines and front axle propshaft splines, brake pedal springs, and clutch pedal springs at the intervals specified. Ball joints and king pin bushings should not be lubricated unless their temperature is 10°F (-I 2"C), or higher. When the weather is cold, let them warm up before lubrication or they could be damaged. Also, be sure to check all the vehicle fluid levels at this time. 3. CLUTCH FORK BALL STUD LUBRICATION (5-SPEED LOW ) - Not MANUAL TRANSMISSION WITH DEEP applicable to utility or wagon models. 4. COOLING SYSTEM SERVICE*? Drain, flush and refill system with new coolant. See"Engine Coolant" in the Index for the proper coolant and mixture to use in your vehicle. Also inspect the hoses and replace them if they are cracked, swollen, or deteriorated. Tighten all hose clamps (except constant tension clamps). Remove debris and clean the outside of the radiator and air conditioning condenser. Wash the radiator neck. To ensure proper operation, pressure test the radiator and cap. 5 . AIR CLEANER FILTER REPLACEMENT* Replace at every 30,000 miles (50 000 km) or more often under dusty conditions. Ask your dealer for the proper replacement intervals for your driving conditions. 6. FRONT WHEEL BEARING REPACK (2-WHEEL DRIVE ONLY) - Clean and repack the front wheel bearings at each brake relining, or at the specified interval, whichever comes first. * An Emission Control Service ?A fluid loss in these systems may indicate a problem. Have them inspected and repaired at once. 7-18