1996 GMC Sonoma Owner's Manual - Page 343

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). You should let your GM dealer's service department or otherqualified service centerdo these jobs. Make sure any necessary repairs are completed at once. Proper procedures to perform these servicesmay be found in a service manual. See "Service and Owner Publications" inthe Index. Exhaust System Inspection Inspect the complete exhaust system. Inspectthe body near the exhaust system. Look for broken, damaged, missingor out-of-position parts as well as open seams, holes, loose connections or other conditions which could causea heat build-up in the floor pan or could let exhaustfumes into the vehicle. See "Engine Exhaust" in the Index. Radiator and Heater Hose Inspection Inspect the hoses and have them replaced if they are cracked, swollen or deteriorated. Inspect all pipes, fittings and clamps; replace as needed. Steering and Suspension Inspection Inspect the front and rear suspension and steering system for damaged, loose or missing parts, signs of wear or lack of lubrication. Inspect the power steering lines and hoses for properhook-up, binding, leaks, cracks, chafing, etc. Throttle Linkage Inspection Inspect the throttle linkage for interference or binding, and for damage or missing parts. Replace parts as needed. Replace any cables that have high effort or excessive wear. Do not lubricate accelerator and cruise control cables.