Hello, GM mechanics, just want to aay thanks for being here to help out fellow GM owners. My problem is I own a 2006 pontiac G6 , 4cyl. I added some accessory items into my car about 2weeks ago. I added 2 1600 watt amps, 2 12" subs rated at 800watts each, three 7inch LCD monitors and a 6.5" dvd indash player. Just yesterday I disconnected my battery for a few seconds and reconnected it. Now the odometer reads error, the electronic steering isn't working, the tranny doesn't shift into any higer gear while driving, the speedometer does not work and the engine cooling fans turns on whenever i turn on the A/C but the A/C compressor clutch will not engage. Could i have possible ruined any of the computer modules in the car? I checked the problems and solutions forum but was not able to find an answer to my problem. Any help would greatly be appreciated.