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Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by skelly1, Nov 27, 2002.
Where do I find the differential number gt# to be able to tell what gear ratio you have??
Open up your glove-box. There will be a lot of RPO codes printed on a piece of paper that's glued to the inside of the flip-down door. Just find the one you're looking for.
Thanks, there's a GT4 listed which apparently means that I have 3:73 gears.
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