Does anyone know how to program keyless entry on an 05 Trailblazer?This is the factory keyless,had to change the body module,now keyless inopereable. Any help would be greatly appreciated!

 

Not sure about the Trailblazer, but here is how to do it for "some" GM vehicles including the Silverado:

1. Get in the truck with the doors closed.
2. Hold down the unlock button on the door.
3. Turn the key from on to off 3 times without cranking the motor or until the horn sounds and the locks cycle.
4. After the locks cycle then release the unlock button on the door.
5. Hold the lock AND unlock button down on the remote until the lock cycle, this should not take longer than 30-45 seconds.
6. Once all remotes are programmed turn the key on and the programming mode will end.

Hope it helps. You should know by the time you turn the key on/off three times if it's going to work. I'm thinking it will.