Have a Car Question? Ask a Mechanic Online.
No problem, just trying to give as much assistance as possible.
Here is a website to check out: http://www.rpocodes.com/
Ignore the advertisements in the middle, just use the list on the left hand side. So for example, if you want to decode G80, click on the link "RPO Codes G through M"
Take note that some codes have several meanings (LG4 is a 5.0 gas engine and a diesel) so you kinda have to see what the code says compared to what you have. Also, due to "packages" and internal options, some codes do not have a meaning and will not be listed. Even when we pull options up through the dealer site, some codes descriptions are blank because they do not correspond to any serviceable component.