1998 GMC Suburban Owner's Manual - Page 407

Drive Axle Service Check readfront axle fluid level and add a s 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. Also inspect drum brake linings for wear and cracks. Inspect other brake parts, including drums, wheel cylinders, 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. 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 and a l l exposed control linkage. Check vent hose at transfer case for kinks and proper installation. More frequent lubrication may be required o n off-road use. 7-43