Automotive Plastic Glazing and Exterior Trim Standards: SAE J576 and GMW 2026 Updates
by
flippancy
25 Jul 2026
This report covers the latest revisions to SAE J576 (Weathering Resistance of Automotive Plastic Glazing) and General Motors' GMW14906 for exterior trim. Key changes include extended UV exposure cycles, new test panel configurations, and integration with DTC diagnostic codes for body control modules. The 2025-2026 updates also address pillar post trim installation and material compatibility for polycarbonate glazing. Testing protocols now incorporate accelerated weathering using Xenon-arc lamps per ISO 4892-2. Compliance ensures reduced risk of B0 diagnostic trouble codes related to exterior trim degradation.
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