The 1988 GMC K Series has 5 recalls, the most serious involving brake rotors that can shed their outer ring in high-salt regions, a shock absorber that can detach and tear a brake line, and a cruise control cable that can stick the throttle open.
In areas where road salt is heavily used, corrosion can cause the front brake rotors to separate, with the cast outer ring breaking free from the steel center. When that happens, braking force at that wheel is lost entirely and overall front stopping power drops sharply, with no warning before it occurs. Separately from the rotor issue, front shock absorbers on certain vehicles were fitted with the wrong nuts that can work loose over time, allowing the upper end of the shock to pull free from its mount. When it does, the swinging shock body can yank a brake hose loose or wear through it, again cutting brake pressure. On the throttle side, the cruise control cable's locking mechanism can release on its own, and engine vibration can then push the cable into a higher throttle position or keep the throttle from dropping back to idle when the driver lifts off the gas.
Two other recalls round out the list. The door striker nuts on certain vehicles may be cracked or broken, and in a collision that stress can cause a door to fly open. There is also a compliance recall affecting C3500 and K1500 trims, where the tire information label on the vehicle lists the wrong tire size, which can lead to incorrect tire selection at replacement time.
