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Re: Where to find rear axle code for 2015 GMC
GM always used RPO codes beginning with the letter G for axle related information. You can go to the below website and see the various GM axle codes and compare to your label. Also, you can always go to your GM dealership parts counter and they can print you out a build sheet from your VIN. Someone told me you can also contact GM customer service and get the build sheet that way but I never tried it.
http://www.rpocodes.com/
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Customization is what you want it to look like -- not what other people think it should look like
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