K 2500 Truck 4WD V8-379 6.2L DSL VIN C FI (1989)
Door Module: Customer Interest
Door Module Area - Water Leaks
GMC NUMBER: 91-10A1-191
GROUP: 10A1 Doors
DATE: August 1992
CORPORATE NUMBER: 261002
WATER LEAK IN THE DOOR MODULE AREA
1988-91 C/K TRUCKS
Some owners of 1988-91 C/K trucks may comment on a water leak at the door module vent valve, at the door module, or between the door trim panel
and door onto the primary weatherstrip. The cause of the water leak may be that the door module does not provide a water tight environment.
To correct this condition, it is necessary to apply a sealer (P/N 12345739) between the door module panel and the air pressure relief valve (Figure 1), to
install a redesigned foam seal (P/N 15697102) between the door and door module panel, and install water deflectors (P/N 15697103) to the door module
Remove the door trim panel (refer to "Door Trim Panel Replacement" in the appropriate Service Manual) and water deflector.
Remove the six rivets that secure the air pressure relief valve to the door module panel (Figure 1).
Apply approximately a 2 mm (1/8 in.) bead of silicone sealer (P/N 12345739) around the perimeter of the relief valve.
Install six rivets to secure the air pressure relief valve to the door module.
Remove the door module mounting bolts.
Remove the lock and handle rods from the back of the module and tape the rods to the door.