Material Description. This standard gives performance requirements for organic coat finishes on the surfaces of underhood and underbody components. It also gives opportunity to specify the type of coating material to be used.

Symbols. Not applicable.

Typical Applications. These coatings are typically used on chassis components, as well as other underhood and underbody components. 

Remarks. This specification applies in two different ways. Either it can be used for paint materials that have been approved to other appropriate GM specifications (e.g., 998XXXX; these materials will show as APPROVED in the GM MATSPC database), or it is applicable for materials that have not been approved by GM. Depending on the material qualification status, the X's in Table A1 indicate the tests to be performed. The usage of non-approved paint materials is only permitted through the calendar year 2011.

Seven "types" of paint are covered by this specification: Types A and B are both cathodic e-coats in two different thickness ranges. Type C is dip primer other than cathodic e-coat. Type D is powder coating. If Type E is specified, the applicator is free to choose Type A, B, C, or D, but they must stay with this choice. Type F is to be further specified on the drawing using notes or a paint material specification. Type G is solvent or water-based spray-applied paint.