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Re: How can I tell what gears my truck has?
Take a look at the RPO sticker (Service Parts Identification) in your glovebox and see if you have one of the following codes:
G80: Locking, Rear Axle
GH0: 3.54:1 Rear Axle Ratio
GT4: 3.73:1 Rear Axle Ratio
GT5: 4.10:1 Rear Axle Ratio
GTY: Wide Track Rear Axle
GU4: 3.08:1 Rear Axle Ratio
GU6: 3.42:1 Rear Axle Ratio
HC4: 4.65:1 Rear Axle Ratio
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