Is there any way around voiding my car warranty when i install subwoofers?

What GMC doesn't know can't hurt them. Anyone that adds anything aftermarket has gone through this same dilemna. Typically, car audio is the least offensive of add-ons. If you're at all concerned about having a warranty claim denied, just be sure that when your car audio install is done that it can be reversed to look like it was never there.

you spoke to a retard, it will not void the warranty....if you do it right, or get it done right. when i went to my dealership for work, they were looking for the key to my wheel lock for changing tires and they said "we thought it could be in the trunk, but we were NOT going to touch all that stereo equipment!" they knew i had "modified" the audio system, but they didnt care. also, there usually isnt a warranty concerning stock car speakers or sound system, but only if parts are damaged, i.e. stock radio, amp (if applicable), speakers, etc. for example, if your radio blows through normal use, they will replace it under warranty. but if you add a radio, speakers, subs, etc., you will be fine. my advice is to speak to the actual service MANAGER at the dealership. or, you could install aftermarket speakers behind the paneling (if thats how yours are now) and they wont even know they are aftermarket. and if you are good enough, "hide" a 4-channel amp somewhere for the speakers. good luck

No. WOW, LISTEN TO THE PEOPLE AT CUSTOMER SERVICE.

yeah because you will most likely be useing a aftermarket amp for the stock speakers, witch mean they will cut some wire and void the warranty.

Just install it in such a way that it doesn't alter the car. For some cars this is tough, mainly when it comes to routing the power cables from the battery in the engine to the amp in the trunk. Some cars have existing holes in the firewall and/or trunk that can be used, some require drilling. The next area that causes trouble is if you decide to bolt the box into the trunk somehow. If theft isn't a huge concern you might be able to just strap them in. In other words, what they don't know won't hurt them ;-)