GMW GMW16193 PDF

This specification describes the General Motors approval process for decorative chrome plating. The plater must obtain an approval for each substrate material, chemical source, finish, and facility combination. Note: Nothing in this standard supercedes applicable laws and regulations. 

Material Description. The entire Class A part surface is to meet all requirements. 

Symbols. Not applicable. 

Applicability. Chrome plated exterior and interior applications. 

Remarks. Finish suppliers (platers) should be approved before Tier 1 sourcing. The Tier 1 should select approved platers from their respective regions, otherwise contact GM Materials Engineering prior to finalizing plating source selection.

If a new plater is to be developed, the Tier 1 is responsible for (a) determining the plater's ability to meet all preproduction part submission dates utilizing production processes, (b) consulting with GM Materials Engineering, and (c) ensuring that the plater is approved before Integration Vehicle Engineering Release, typically Start of Production (SOP) – week 74. The Tier 1 should identify an approved backup plating source in these cases. Once a plater has successfully completed the approval process, their approval record (trim transmittal) will be available on the GM Supply Power web site. The trim transmittal will support the Tier 1 - GM Production Part Approval Process (PPAP).

One approval may be applicable for future parts with the same combination. Any substrate, solution chemistry, supplier, process, or facility change is subject to re-qualification (including a new trim transmittal).

Note: An approval is based on single part geometry. Subsequent parts must be tested to meet GM PPAP requirements (GM Materials Engineering reserves the right to require an additional approval if part complexity warrants).