If crappy tire is the only authorized inspection facility, then there's alot of vehicles that are in a lot of trouble. I wouldn't trust them to look at my truck from across the parking lot.
Go to the dealer, there is a DRL module that will plug into the wiring harness. I could be wrong, but I believe it is just behind the rad support on the drivers side. When you're at the dealer (and go to the parts dept, not the service side) ask them to print off a diagram of the location of the DRL module.