RPO Codes for an '03 Envoy XL SLT

[sgiangregorio]

I tried to find the RPO codes, but can't. I have a few questions about the codes for a locking diff (not sure if the Envoy SLT has this), what rear axle gear ratio it has, and the actual paint color code.

 

We just bought this for my wife, a 2003, but we have these questions.

 

Thanks

[Envoy Fan]

The RPO codes are in the glove box on a label. Guess you bought it used, so no window sticker. You can go to a local GM dealer and talk to the parts department. Give them the complete vin # and they can print out how the vehicle was built at the factory.

 

If you have the code G80 in the glove box label, you have the locking differential. If you have the code GT5 you have a 4.10 rear axle ratio. If you have the code GU6 you have the 3.42 ratio.

[sgiangregorio]

Yup, bought it used. Thanks for the codes, I should haev guessed that they were the same as other GMs. I don't know why I thought they would be different. Couldn't you get this truck with 3.73s too? Do you know the code for that?

 

Thanks for the help.

[blue2kzr2]

GT4 for 3.73....