2000 GMC Sierra 1500 Pickup Owner's Manual - Page 402

yellowblue Throttle System Inspection Inspect the throttle system for interference or binding, and for damaged or missing parts. Replace parts as needed. Replace any components that have high effort or excessive wear. Do not lubricate accelerator and cruise control cables. Transfer Case (Four-Wheel Drive) Inspection Every 12 months or at oil change intervals, check front axle and transfer case and add lubricant when necessary. On manual shift transfer case, oil the control lever pivot point. Check vent hose at transfer case for kinks and proper installation. More frequent lubrication may be required on off-road use. Drive Axle Service Check rear/front axle fluid level and add as needed. Check constant velocity joints and axle seals for leaking. Brake System Inspection Inspect the complete system. Inspect brake lines and hoses for proper hook-up, binding, leaks, cracks, chafing, etc. Inspect disc brake pads for wear and rotors for surface condition. Inspect other brake parts, including calipers, parking brake, etc. You may need to have your brakes inspected more often if your driving habits or conditions result in frequent braking. 7-24