1996 GMC Sonoma Owner's Manual - Page 322

I Short TripKity Maintenance Schedule 1 99,000 Miles (165 000 km) 0Change engine oil and filter (or every 3 months, whichever occurs first). An Emission Control Service. 100,000 Miles (166 000 km) 0Drain, flush and refill cooling system (or every 60 months since last service, whichever occurs first). See "Engine Coolant" in the Index for what to use. Inspect hoses. Clean radiator, condenser, pressure cap and neck. Pressure test cooling system and pressure cap. An Emission Control Service.? 17 Lubricate the front suspension, ball joints, steering linkage and transfer case shift linkage, parking brake cable guides, propshaft splines, universal joints, brake pedal springs and clutch pedal springs at every oil change (or every 3 months, whichever occurs first). Check readfront axle fluid level and add fluid as needed. Check constant velocity joints and axle seals for leaking? DATE ACTUAL MILEAGE SERVICED BY 0Inspect spark plug wires. An Emission Control Service. 0Replace spark plugs. An Emission Control Service. 7-30