Good luck...

Truck was pretty nasty for sure

Thanks for watching but I didn't need to program the SRS module only set it up in the BCM which almost any scan tool could do.

@@PhillipBailey THANKS FOR THE FOLLOW UP .

Well you're very observant. I would imagine the instrument cluster receives data over the serial data or can bus from the air bag module so if it's offline the indicator in the cluster may not work. The chime you hear is actually coming from the radio speaker usually on driver front and the radio is on the network. If an aftermarket radio is installed they usually add another module to return the function of the seat belt, key in ignition and head lights left on warning. I'd start with a network scan of all controllers retrieving codes and then see if there is the ability to bidirectional control the light in the cluster and the chime function. You will need a full function scanner to do this obviously. Look at data and controls in Air Bag, BCM, Cluster, Radio. Good luck.

Best to remove the seat and lift the carpet to inspect the module. To test the wires to the sensor from the module connector use an ohm meter to check continuity of each wire, shorts between wires and shorts to ground

It is a recall not just a TSB but if it was done in 2009 there is no further action from GM.

Tests/Procedures: 1. Disconnect the harness connector at the inflatable restraint I/P module disable switch. 2. Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal B and ground. 3. If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance, if the circuit tests normal continue. 4. Verify that a test lamp illuminates between the I/P module disable switch signal circuit terminals E and A and B+. 5. If all circuits test normal, replace the inflatable restraint I/P module disable switch.

@@PhillipBailey thank you