Re: 08 ext voided warranty
Evilx3, thank you for letting me know about the issues you are having. Unfortunately GM has a strong stance against modifications. This is the documentation that I have been able to find on modification.
The New Vehicle Limited Warranty does NOT cover any damage or failure resulting from modification, alteration or suspected tampering, to the vehicle's original equipment as manufactured or assembled by General Motors. Any changes to the GM Powertrain, Fuel, or Emission Systems that involve modifications, conversions, or the addition of non-GM approved products will void the GM Powertrain Limited. GM will not be responsible for costs associated with the repair of these vehicles due to failure of the aftermarket installed components or failures of related vehicle systems induced by these non-GM approved products. Further more, if determined appropriate, the GM Field Representative can proceed with voiding certain portions of the vehicle’s warranty.
Some dealerships will install modifications to vehicles that GM produces and some that we do not. Then some will not perform any work under warranty for vehicles that have any kind of non GM modifications which would be the servicing dealership at this point. I apologize but the coverage for you at this point would be up to your servicing dealership. What I would like to do though is to setup a case for you. If you would private message me your information I would like to do this for you.
Jeff Morris, Cadillac Customer Service