How to Replace Wiper Linkage Bushings 88-99 GMC Sierra K1500

Difficulty: Intermediate · About 75 min · Gmc Sierra K1500

Renew worn windshield-wiper linkage bushings on a 1988–1999 GMC Sierra K1500 by marking the arms, removing the cowl and linkage, pressing in new bushings, and checking sweep alignment.

Steps

1. Mark and remove the wiper arms

   Park the wipers at their normal resting position and mark each blade position on the windshield with painter's tape. Lift the wiper-arm covers, remove the retaining nuts, and pull each arm off its pivot without bending it.

2. Remove the cowl and linkage assembly

   Peel back the cowl weatherstrip and remove its Phillips fasteners and corner panels. Lift the cowl enough to disconnect the washer hose, then remove it. Unfasten the wiper-linkage arms from the motor and remove the transmission mounting bolts to lift the assembly out.

3. Replace worn linkage bushings

   Release the ball socket from the worn bushing and secure the linkage arm in a vise. Drill out the old bushing carefully without enlarging or damaging the linkage hole, then remove all debris. Support the arm with a socket and press the new bushing squarely into place using the vise.

4. Lubricate and reassemble the linkage

   Apply a small amount of bearing grease inside the new bushing and press it onto the ball stud by hand. Reinstall the transmission, reconnect the linkage arms in their original positions, and tighten the mounting hardware securely.

5. Refit the cowl and align the wipers

   Reconnect the washer hose and reinstall the cowl, corner panels, screws, and weatherstrip. Fit the wiper arms to the windshield marks, tighten their retainers, and run the wipers briefly to confirm smooth movement and correct park position.

Check your vehicle’s repair manual for exact specifications and fit.