2004 Tahoe Gauge Problem

I installed a Head Unit, 6 Speakers, 3 Amps, and two subs in a 2004 Chevy Tahoe. Since the truck has Databus II, I needed to use P.A.C.'s C2R-GM24 door chime module. The truck had a Bose system in it. The problem is- When the truck is runnig, and you put it in gear, the gauges go from thier normal position to 0, then back to their normal posions. The truck also reads "check tire monitor". The owner just put 22" rims on it, could that have anything to do with it?

you should had usedthe pac os-2bose and the door chime module. both of those are needed. also for the tire pressure.did he put the tire sensors that were in the stock tires in to the new rims. if the truck doesnt seee the sensors it will triggger the light.