scope:

Note: Nothing in this standard supercedes applicable laws and regulations.

Note: In the event of conflict between the English and domestic language, the English language shall take precedence.

Purpose/Material Description.

This specification defines the performance requirements for pre-treatment, paint materials, and processing required to paint/coat aluminum road wheels. This specification also applies to aluminum wheel trim. Painting/coating durability requirements are also included.

Note: For chrome plated aluminum wheels and wheel trim, refer to GMW15774. For chrome plated plastic wheel trim (including claddings) refer to GMW14668. For painted plastic wheel trim refer to GM Material Specification 9984899.

Symbols.

Not applicable.

Applicability.

Painted aluminum road wheels and aluminum wheel trim.

Classification/Wheel Types.

Type A: Wheels with any clear topcoat paint(s) over bright metal sections of the disc outer and/or rim flange, for example, bright polished wheels, machined faced wheels, mill bright aluminum overlays, or circular brushed aluminum overlays.

Type B: Fully color painted wheels without any areas of clear topcoat paint(s) over bright metal sections on the disc outer and/or rim flange.

Remarks.

This specification applies to all surfaces that are designated on the engineering part drawing to meet these requirements. Painted parts must meet these requirements prior to going into the field and must also satisfy GM's and its customers' expectations for appearance and cosmetic durability. All deviations from this specification must be agreed upon by GM and must be documented on the part drawing. Appendix B shows the typical testing required (noted with an "X") for Production Part Approval Process (PPAP), Materials Approved Source List, and color development.