07 trailblazer rear hatch lock?

I put a keyless entry on a 2007 trailblazer. I used a 457gw. I have used them on TONS of chevys and have never had this problem. When u UNLOCK the truck, it works fine. When you LOCK, all the doors will lock, but the rear hatch will not lock? Has anyone else had this problem yet?"If u dont get it on the first try. Smash it"

It's a problem with all 457G's and it's only on the Trailblazer platform. DEI knows about this but i haven't had one work ever. They suggested better ground and a few other things but it doesn't help. I switched to 1700g's or 1700g1's and it cured the problem. For a while we were even adding 556lw's on top of the 457g just to lock the back door. If you want to keep it simplier you will need to add a relay in the back hatch just to lock it...Mike M2

Tech Manager

CS Dealer Services

Mike M2 wrote: If you want to keep it simplier you will need to add a relay in the back hatch just to lock it...

Simple?  really?