This is for the guy with the dim airbag light. The problem sounds like its in the instrument cluster. Although, if wires are shorted out because you changed the radio, you could have pinched them going back in. If there are no shorts for sure, them the cluster is to blame. The fix is to send it out and get it repaired, buy new or black tape over the light. i don't recommend it tho.

 

it's a possibility but there's no sense in making the truck inoperable and spend that much $ with no promise it will get fixed.... lets see if he comes back with anything that he's tried now.