I have a simple question, but I have no clue... I have a sportside regular cab, 2002 silverado (black) 5.3 I don't have the 4x4 or the Z71 package but I do have limited slip... what are my stock gear ratio, is it the 3.42 or the 3.73

 

Check Fast4.8 website he has all the codes from your vin#.

 

What is his website

 

Fast4.8's RPO Codes page <---Click Here

<img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />

John

 

Where can I find my RPO codes from, I have my VIN number, I looked over that and it has nothing to do with it... I'm new to this site so can you guys help me out thanks... <img border="0" alt="[cheers]" title="" src="graemlins/gr_cheers.gif" />

 

Doh! <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" /> Just check in your glovebox. There is a little sticker in there with all the codes for your truck on it.

Look for these codes. Whatever ones are on that little sticker are what's in the truck. <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />

G80: Locking, Rear Axle
GH0: 3.54:1 Rear Axle Ratio
GMC: Pontiac East Assembly
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

John

 

Thanks guys, I have the GT4 3.73 to 1...