im in a 2007 pontiac Grand prix GT an i have no bolts what so ever to mount a ground. i even took my back seats out an nothin. what should i do an i dont wanna drill into my trunk if i dont have to.
A Factory bolt is never a good ground Your better off using a non-factory ground (drill, sand off paint then nut and bolt)
I'll remember to NEVER take my truck there for stereo work. Now to answer your question, most factory bolts have sealers on them to prevent corrosion. This sealer prevents these bolt from providing a good ground. While you can easily remove the sealer or paint from the bolt, its nearly impossible to remove it from where the bolt screws into. Factory bolts are always a bad idea. Its even stated in the install manuals of most amplifiers that factory bolts should be avoided.
we finally got it we removed the carpet an got it bolted by the 6x9's in the rear glass. an yea we sanded down to bare metal an did it.
