I installed a H&S Race tuner with 5'' straight pipe's and a EGR Delete and the exaust brake stoped woking. I know what you are thinking its the tuner. I thought it might be to So I put the factory program back on but the brake still does not work. I got two codes

U011A - Lost communication with the exaust gas sensor module
U010C - Lost cummunication with the turbo charger/supercharger Control Module

I have met people with the same set up and their exaust brake works normal so I know it should work. I also talked to H&S and they said the kit should not mess with the exaust brake. I rechecked the installiton about five times I cant see anything I unpluged or anything I broke. The turbo is spooling up and the truck does run great The brake not working is the only problem I notice.

I know if I cant find the problem Im going to have to put everything back to stock and take it to the dealer but I would like not to for many reasons in witch you all prob. know.

Well if anyone has any information That would be awsome.

Thanks
Riggs