1977 gmc sierra grande 15 - 1999-2013 Silverado & Sierra
Oct 16, 2019 · Member. 1. 2,719 posts. Location:Tyler, TX. Gender:Male. Posted June 24, 2006. Hey, I was wondering if anyone knew where I could find the specs for a 1977 sierra grande 15 at. We've got one sitting here and I'm thinking of fixing it up, so I figured I better know whats it got.
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