Welcome Jon, nice truck. thumbs_up The sheet metal looks to be in good shape. I don't have the answer to your question, but I'm sure someone will come along and enlighten us both.

FYI: I believe your truck may be a 3/4 ton based on the extra side support on the bed. Mongo is a GMC expert, I bet he knows for sure.

John

~ J Lucas
2006 GMC Envoy 4.2 I6
2023 Ram 2500/Cumins 6.7 I6
2010 Jeep Grand Cherokee (Wife’s)
2002 Silverado 2500 Gas 6.0
1941 Chevy 1/2-Ton
1942 Chevy 1.5-Ton SWB
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