2003 Chevrolet Express Van Owner's Manual - Page 365

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 and Front Axle (All-Wheel Drive) Inspection Every 12 months, or at engine oil change intervals, check front axle and transfer case and add lubricant when necessary. A fluid loss could indicate a problem. Check and have it repaired, if needed. Check vent hose at transfer case for kinks and proper installation. Rear Axle Service Check the gear lubricant level in the rear axle and add if needed. See Rear Axle on page 5-50. A fluid loss may indicate a problem. Check the axle and repair it if needed. 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. Check parking brake adjustment. You may need to have your brakes inspected more often if your driving habits or conditions result in frequent braking. 6-18