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Re: Rear End Ratio RPO Codes Here
if you need to find your rpo codes if the list in the glovebox is worn off, take your vin into a dealer, they should be able to print you out the list.
1997 GMC Sierra 4x4 4.3L 4L60E KOSS CD player,16mpg,3.73 gears z71 skid plates 89 W/T Grille, fender flares coming.

GM trained 2nd year apprentice at a Chev Dealer
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