So it would appear that 67-72 sheetmetal is originally 20 gauge 20=0.0359 , the 1988 sheetmetal would appear to be 22 or 23 gauge
22=0.0299 23=0.0269
and our replacement panels would appear to be 19 gauge 19=0.0418
GMCPaul
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Online Catalog for-GMCPauls Truck Parts.com
67 LWB GMC SuperCustom Fleetside
67 LWB GMC Stepside
67 SWB GMC Stepside
67 SWB GMC Fleetside
67 SWB Chevy CST Fleetside
67 LWB Chevy CST Fleet
67 SWB Chevy Stepside
67 LWB Chevy Stepside
68 LWB Chevy Fleet 4X4
69 SWB Chevy Stepside
71 GMC Suburban 402/400
72 LWB Chevy Camper Special
72 LWB Chevy Camper Special
Nope not a typo 2-72 Camper Specials
and no they are NOT FOR SALE MINE MINE MINE and we accept ALL 67 Refugees Looking For More Never Enough!!!