Is it possible in 92 a crew cab would get those mirrors too and not just the suvs because i have a 92 with power mirrorsSuburbans (and probably the Blazer/Jimmy) had the black plastic folding mirrors since they switched to the GMT400 platform in 1992. The pickups got 'em beginning in 1994, but not all of them, of course. You could still get dumbos on lower trim levels all the way to the end, or near it.
Reverse-history gives me the feeling that those black plastic folding mirrors started out as strictly power mirrors for the SUV's in 1992, and then in 1994 we started seeing the non-power in the same style for the pickups.
Official 1992 GMC Suburban brochure pic
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Richard
And it doesnt look to been swapped unless someone did a real professional job. But usual doesnt happen around here