My Hummer is mad at me!

[WPBGUY]

I removed the AirRaid intake and TBS and sold On eBay. Now I am getting an intermintent message "SERV TPM". This morming while I was backing out of my parking space, I heard a bang from the rear end. I thought I hit something, but nothing there. Then It did it again tonight. I have already been throught the washer pump and serpenine belt problems. I know mine was one of the first ones. Am I going to have to deal with more problems? Also the 4X4 modes are dificult to come on. I love my H3, but I don't think it loves me back!