I'm late to this thread for sure. But unless any of the "void your warranty" folks have actually been denied service/warranty work...well, you know the old saying about opinions. I have been down this road with 2 diesels over "plug and play" tuners. One of the tuners ABSOLUTELY changed the calibration of fuel and air. The other one didn't do ANYTHING, except monitor PIDS that weren't on the dash! Also, went to war with GM over defeating the AFM on a Surburban...it still killed two lifters and they said NOT allowing it to shut down lifters is what killed them! I was only about 1200 miles from being out of warranty and finally just gave up. Bought a $600 AFM delete kit off Amazon and then had it completely re-tuned. Completely different Burb after that! I didn't even want to get rid of it. That dang thing has 230K on it and has been through two of my friends, at this point. But yeah...don't really see just turning something on, that already exist...to ever become an issue.Whew!!! I was worried for a moment that installing keyless entry might have been later used to deny my warranty should my engine shit a valve!
Can you imagine if programming the homelink or saving a radio preset voided your warranty because it wasn't set to a factory value?!?
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