03 Check Engine Light Question

[TouchdownTN]

Thanks for all the help. I had a local mechanic read the codes and it is a catalytic converter problem and engine misfire. The Hummer dealer says that it should be under warranty (8yr/80k). I hope so because I was told it could be from $400 to over $1000 to fix. Thanks for the help!!!

[hummer74]

let us know what it was after the dealer is done with it. thanks

[Planohummer]

pcm and convertors are 8/80 wty with $0 ded. If the dealer tries to quote you for diagnosis up front that's fine, but once the convertor(s) is/are found at fault, the charge should go away.
The misfiring may also be intake gaskets, find out exactly what codes are present from the dealer.