Been over at duramax forum since I bought my truck back in February. Have decided to look into other forums.
I have a 2007 GMC Sierra classic 2500hd, SLT, LBZ, CC/SB, 4x4. Had a 4 inch exhaust, Alpine Type R door speakers, Alpine 100.4 4 channel amp, cowl hood, and tonneau cover on it when I...