Rear End Gear Ratio on 97 Seirra

[newh68ss]

Hello,I am new to this ,but i have a 97 gmc seirra 4x4 with 373. gears and the rear end is going .i went to my local gmc dealer and i told him my vin number and he told me what my gear ratio number was .doe's any one know where i can get that info with out taking off the basket cover on the rear end .or how i can tell by reading the vin.what number to look for that would tell me that the truck would have the same ratio is to what i have .thank you in invance for any and all help.geno

[Jeremy-WI]

There is a sticker inside your glove box with the RPO codes, you should find a GT4 on it. GT4 is the RPO code for the 373 gear ratio and any vehicle made with that gear ratio should have that code

[sudsy49]

Any time you don't know your gear ratio, an easy way to find out is to jack up the truck and turn the rear wheel one complete turn, have a buddy count the # of turns the driveshaft turns around and that is your axle ratio. Remember, if your truck is non- posi, make sure both rear wheels turn together or the differential will give you a false reading!

[slacker_53]

Check your glovebox for the build sticker.

GT4 3:73
GT5 4:10
GT7 3:33
GT8 4:10
GU2 2:73
GU4 3:08
GU5 3:23
GU6 3:42
GV2 5:83
HC4 4:56
HF8 4:88
GN9 4:11
GH0 3:54
GK9 4:63
GL3 6:17
GM1 2:59
GM3 3:45
GM8 2:56

Your Ratio should be located somewhere right of center about the second or third row down from the top and most of the time begins with a 'G'. Your truck should either be a GT4 or GT5.

-slacker