Just wanted to add a quote made here on Camaro5 by one of the Chevrolet Customer Service Reps in response to a post about warranty concerns when modifying.
Originally Posted by Chevrolet Customer Svc
Modifications or tunes do not automatically void the powertrain warranty, but in many cases they will. If there is an issue or damage, and it is found to be the result of a modification or tune, then your powertrain warranty will be found void. These products may have detrimental effects on the performance and life of the engine, exhaust, emission system, transmission, and drivetrain. I hope this helps.
Chevrolet Customer Care