Other than the dealer, is there anywhere I can go (internet or otherwise) to find out how my Blazer came equiped from the factory? I know the easy stuff, but I would like to know what rear end ratio and type of diff. I have. Also is it possible to retro fit the outside spare tire carrier to a Blazer that didnt come with it?

 

RPO code list in your glove box will list everything that originally came on your truck.

Regular Production Option (RPO) Codes

 

Thank you! I now know that my Blazer came with a 3.42 rear end, N60 wheels, trailer harness, and a 100amp alt.

 

You are welcome!