GMC 1996 Savana Van Owner's Manual page 344

Rear Axle Service
Check t.he gear lubricant level in the rear axle and add if
needed. See "Rear Axle" in the Index. A fluid loss may
indicate a problem. Check the axle and repair it if needed.
Drive Axle Service
Check readfront 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. 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.
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