Add one more person to the list of '07 tcs with the HVAC light problem. But my question is, the problem started a few months after i got my aftermarket hu installed and i am wondering will the dealer still cover it even if have an aftermarket hu? (im still under 36k)

or should i just put my stock hu back on and then go to the dealer? I just dont want to waste any unnecessary time.

 

Unless the dealer can prove your aftermarket HU caused the problem, which they can't, you will be covered under warranty.