[Mandrax60]

Thanks all again for your help. I need the RPO'S decoded to know what calipers and other things. A GMC dealer told me my truck was an HD but no badges. Maybe someone can help me with this. Thanks. I attached a picture of my RPO's.

Respectfully,
Michael Hogan

 

[Trippblack]

https://rparts-sites.s3.amazonaws.com/dec399b0838336997484042ed2af1004/design/rpoCodes.pdf