I just purchased a 2002 Silverado, 4.8L V-,8 Automatic, 4WD, Extended Cab, Short box, tow package. I'm trying to determine my towing capacity. The manual says it depends on my Axle Ratio and I've either got a 3.73 or a 4.10. I don't have the original purchasing documents, how can I determine the Axle Ratio? Does the towing package also include the 4.10 ratio automatically?

 

look in your glove box for the rpo code:

gt4 is 3.73, gt5 is 4.10, gu6 is 3.42

those are the most common

 

Ok so, I remember those three codes but what about the G80? I got that and would also like to know around about what the ratio might be. If I were a bettin man, I'd say gafftaper has 3.73, and that I have a 3.73, But i've been known to be incredibly wrong at guessing.

 

http://www.c2e.info/rpocodes/

check out your codes here

 

G80 is just the code stating if you have the locking diff or not. you can get it no matter what the ratio is.

 

Thank You! It's the 3.73.

 

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