How to Replace Wiper Motor 88-98 GMC Sierra K1500
Difficulty: Intermediate · About 60 min · Gmc Sierra K1500
Replace the windshield wiper motor on a 1988–1998 GMC Sierra K1500 by marking the arm positions, removing the cowl, and checking linkage operation before reinstalling the wipers.
Tools you will need
- 10mm socket
- Ratchet and extensions
- Phillips screwdriver
- Flat blade screwdriver
- Painter's tape
Parts and supplies
- Windshield wiper motor
Steps
Mark the wiper arm positions
Mark each wiper blade's parked position with painter's tape. Release the arm retainers and lift the arms from their pivots.
Remove the cowl
Remove the firewall weatherstrip and cowl screws, including the corner panels. Lift the cowl and disconnect the washer hose before removing it.
Remove the wiper motor
Loosen the linkage nuts and separate the arms from the motor stud. Disconnect the electrical connector, remove the three motor bolts, and lift the motor away.
Install the replacement motor
Position the motor and reinstall its mounting bolts. Reconnect the electrical plug, seat the linkage arms on the motor stud, and tighten their fasteners to the vehicle's specification.
Reinstall cowl and wiper arms
Reconnect the washer hose and reinstall the cowl, corner panels, screws, and weatherstrip. Align the wiper arms with the windshield marks and secure them on their pivots.
Test wipers and washer
Run the wipers briefly and confirm both sweep and park correctly without contacting each other or the cowl. Verify washer spray and check for loose fasteners.
Check your vehicle’s repair manual for exact specifications and fit.