LIFT GATE MOLDING CORROSION - REPAIR PROCEDURE. GMC Truck S15 Pickup - 4WD 1983

For 1990-2009 cars

# LIFT GATE MOLDING CORROSION - REPAIR PROCEDURE

#### VEHICLES AFFECTED: 1983-84 S/T Blazer/Jimmy

Poor paint adhesion accompanied by corrosion may be evident on the lift gate mouldings of some 1983 - 1984 S/T Blazer/Jimmys. These black painted parts blister on the bottom exterior surface of the moulding strip. In some cases, the upper moulding section and the surfaces on the interior of the vehicle may also show signs of paint blistering.

To repair vehicles in the field experiencing this condition, it will be necessary to refinish the affected mouldings.

Repair Procedure

#### Notice: Mouldings cannot be removed from the glass assembly. Care should be used to insure that the glass is not damaged during this repair and that surrounding areas not affected are properly covered and masked.

1. Clean the affected mouldings with a grease and wax remover (DuPont 3919 Prep-Sol or equivalent).

2. Remove the paint down to bare metal at the areas where corrosion or paint blistering has occurred. Be sure to sand beyond these areas to insure that all oxidation is removed. The lip surface on the upper edge of the bottom moulding must also be carefully prepared and painted.

3. Featheredge the paint along the surface of the entire moulding using standard paint preparation procedures.

4. Metal prep the bare metal thoroughly (DuPont 5717 metal conditioner or equivalent). Avoid contact of metal conditioner with painted surface.

5. Mask off the surrounding area and spray moulding with an epoxy zinc chromate primer (DuPont 8255 or equivalent).

6. Sand primer on total affected moulding, using 360 grit dry followed by 400 grit dry.

7. Paint the entire affected moulding using an acrylic enamel (DuPont Centari or equivalent) Fisher code WA 30, black 30 DEG. Refer to Chart A for refinish numbers.

EXTERIOR COLOUR REFINISH NUMBERS

Paint Colour Fisher Ditzler DuPont Martin Sherwin-Williams Rinshed Colour Name WAEM ------- ------ Senour Acme/Rogers Mason Code ---- Code ------ ------------ ----- ---- ---- 09 Black WA-30 9475 B8260 99-5533 32200 12864 30 EM-5118

CHART A

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.