where is TCCM located on 2005 Silverado? on 2005 Chevrolet Silverado 1500

is it under dash,drivers side?

Under the dash on the driver's side clipped into a plastic bracket. it will be towards the left front firewall near the wiring harness that goes through to under the hood. It will have 2 connectors on it and the connectors will be facing the firewall and easy to get at.