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Shock Absorbers: Inspection

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 1990 GMC Suburban, 1990 GMC Pickup, 1990 GMC Cab & Chassis, 1990 Chevrolet Suburban, and 1990 Chevrolet Pickup. However, it is still accessible from the selected car via links, so may be relevant.
  1. On fluid-filled shock, purge air from pressure chamber by mounting shock in vise (top end up) and fully extend unit. Reverse position (top end down) and fully collapse unit. Repeat procedure several times.
  2. Bench check shock unit by mounting in vise with top end up (top end down on gas charged shocks). DO NOT clamp vise on reservoir tube or mounting threads. Check rubber grommets for deterioration and replace as needed. Operate shock by hand at various rates of speed and note resistance. If resistance is not smooth and constant, replace shock.
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