Non-GM Engine Calibrations Void Warranty!
 

Non-GM Engine Calibrations

General Motors does not endorse the use of aftermarket (non-GM issued) engine calibrations in any of its gasoline or diesel powered vehicles in North America. When non-GM issued engine control calibrations are detected, steps should be taken to void the Powertrain portion of the New Vehicle Warranty.

Bulletins 08-06-04-006A (diesel engine vehicles) and 08-06-04-033 (gasoline engine vehicles) outline the procedures to be used in identifying the presence of non-GM issued calibrations. Non-GM issued engine calibrations subject driveline components to stresses different from the calibrations to which these components were validated. The stresses resulting from the non-GM calibrations and equipment were not validated by GM and therefore cannot be warranted on any components that are subject to those stresses.

Where a non-GM engine calibration has been verified, current and future repairs to engine, transmission, transfer case, driveline, axle and/or other driveline components are not covered under the terms of the New Vehicle Warranty.

GM TechLink August 2008

Re: Non-GM Engine Calibrations Void Warranty!
 

If you return your tune to STOCK before service, can they still tell if it's been tuned???

Re: Non-GM Engine Calibrations Void Warranty!
 

That is pretty much SOP for any manufacturer. So, before bring it in for service, break out the tuner and reinstall the tock tune. Problem almost fixed. "Almost" because there have been cases of manufacturers, namely Subaru, visiting forums and noting mods, then using it to drop warranty coverage.

Re: Non-GM Engine Calibrations Void Warranty!
 

Beware ,the Warranty police may be watching. :lame:

Re: Non-GM Engine Calibrations Void Warranty!
 

The BASTARDS!!!!:soapbox: