1998 GMC Sonoma Owner's Manual - Page 368

Part C: Periodic Maintenance Inspections Listed below are inspections and services which should be performed at least twice a year (for instance, each spring and fall). YCIU should ler your decder-S ser-vice departrnerzt or other qualified service center do tlzese jobs. Make swe any necessary repairs are completed at once. Prope roceaures to perform these services may be found I n a service manual. See "Service and Owner Publications" in the Index. ~ Exhaust System Inspection Inspect the complete exhaust system.Inspect the body near the exhaust system.Look for broken, damaged, missing or out-of-position parts as well as open seams, holes, loose connections or other conditions which could cause a heat build-up in the floor pan or could let exhaust fumes into the vehicle. See "Engine Exhaust'' in the Index. Engine Cooling System Inspection Inspect the hoses and have them replaced if they are cracked, swollen or deteriorated. Inspect all pipes, fittings and clamps; replace as needed. Clean the outside of the radiator and air conditioning condenser. To help ensure proper operation, a pressure test of the cooling system and pressure cap is recommended at least once a year. Steering, Suspension and Front Drive Axle Boot andSeal Inspection Inspect the front and rear suspension and steering system for damaged, loose ormissing parts, signs of wear or lack of lubrication. Inspect the power steering lines and hoses for proper hook-up, binding, leaks, cracks, chafing,etc. Clean and then inspect the drive axle boot seals for damage, tears or leakage. Replace seals if necessary. 7-46