K 2500 Truck 4WD V8-379 6.2L DSL VIN C FI (1989)
Blues, Grays and Silvers used as both the primary and "insert colors".
Action:
Refinish both high potential color surfaces above the body side moldings (or to the lower feature line on certain vehicles).
Vehicles should be repaired with the same type materials they were manufactured with; repair basecoat/clearcoat with basecoat/clearcoat materials and
monocoat with monocoat.
PAINT REPAIR PROCEDURE
1.
Some vehicle components will be removed from the vehicle while others will require masking. The list located at the end of this bulletin will
establish the removal items. Items not found on the list and non-repair areas are to be masked.
2.
Prior to removing the paint finish, clean the area to be refinished with an appropriate wax and grease remover to remove any contaminants.
3.
Remove the original finish of paint down to the ELPO primer surface using an orbital D.A. sander, leaving the ELPO surface intact. This can be
done in "stages" using 80 grit (or finer) discs to remove the majority of coating, followed with 180 grit (or finer) discs to remove the remainder of
material down to the ELPO surface and any chalky residue or degraded ELPO that may remain. Avoid sanding through ELPO to bare metal in
order to retain maximum corrosion protection.
-
An alternative in some geographic areas may be plastic media blasting such as may be provided by members of: - Dry Stripping Facilities
Network 1-800-634-9185 *
* We believe these sources and their equipment to be reliable. There may be additional manufacturers of such equipment. General Motors does
not endorse, indicate any preference for or assume any responsibility for the products or equipment from these firms or for any such items
which may be available from other sources.
Important
Additional time or payment beyond established allowances in this bulletin will not be allowed.
- The use of a razor blade on large flat surfaces is not recommended because of the potential to chip. gouge or otherwise damage the primer surface.
If razor blade technique is used, the application of a "guide coat" prior to wet sanding should also be used.
Note:
Chemical stripping is not recommended because of negative impact to moldings, non-metal components, ELPO and environmental concerns.
4.
Blow off with air to remove all dirt and sanding residue from cracks and vehicle surface.
5.
Clean sanded surface with an appropriate wax and grease remover.
6.
Tack wipe entire area to be primed.
7.
Spray entire prepared area with a coat of anti-corrosion primer to ensure maximum adhesion and corrosion resistance. Be sure to cover any bare
metal surfaces exposed during the sanding operations. Follow manufacturer's instructions and recommended dry times.
Typical materials for this application would be: DuPont 615S/616S, BASE DE17/PR8O/DA18, PPG DP4O/DP401, or equivalent.
V.O.C. materials would be: DuPont 615S/616S, BASF DE15/PA16/PRB0, PPG DCP21/DCX211 or equivalent.
8.
Apply two to three medium wet coats of primer surfacer to the primed surface of the vehicle, following the manufacturer's instructions for
application and film build requirements.
Important
Failure to apply primer surfacer will likely result in future delamination.
Typical materials for this application would be: DuPont 1120S/1130S/1125S, BASF DP20/PR80/PH36, PPG K36/DT870/K201, or equivalent.
V.O.C. materials would be: DuPont 210S, BASF HP400, PPG DCP21/DCX211, or equivalent.
9.
After allowing adequate drying time, wet sand with 400 grit (or finer) or dry sand with 320 grit (or finer) sandpaper.
10.
Repeat steps 4 through 6.
11.
Apply a medium coat of corrosion resistant primer sealer (tintable base) to the entire surface to be refinished. This will provide maximum
adhesion, uniform color coating and corrosion protection to areas "sanded through" during wet sanding. Follow manufacturer's instructions and
recommended dry times.
