Steel Spot And Plug Weld Nugget Size: GM - UPDATE

I-CAR · February 12, 2021 · General Motors, Chevrolet, GMC, Buick, Cadillac

Summary

This article outlines General Motors' requirements for spot and plug welding during collision repairs. GM does not specify a unique spot weld nugget size but mandates squeeze-type resistance spot welding (STRSW) equivalent to factory welds wherever accessible, allowing 8 mm (5/16 in) MIG/MAG plug welds only when STRSW access is not possible.

What to do on the job

Use squeeze-type resistance spot welds (STRSW) equivalent to factory welds where accessible, and only substitute with 8 mm (5/16 in) MIG/MAG plug welds when STRSW access is impossible.

How to use it

Use this document to justify the necessity of using STRSW equipment on GM vehicles, as GM mandates it where accessible. If STRSW is not possible due to access constraints, use this document to support the inclusion of 8 mm (5/16 in) MIG/MAG plug welds on the repair estimate.

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