The backup break on my trail blazer will not work. The foot pedal feels very loose and the break will not engage. The regulare break works but the aux wont. I have tried the bleeding procedure but not sure if I have done it correctly. Is there any other meathod in adjusting this break besides the bleeding?? And if so how?

 

What year TB do you have? I have a 99 & 00 and there is no adjustment
to the AUX brake on mine. The looseness is probabley from the piston where
the pedal is attached. There is a lock nut that adjusts the travel of the piston.
That piston that pushes brake fluid to the caliper maybe out of adjustment.

 

I have a 2002

 

I had the same problem with the '01 that I had. I did the bleeding procedure like a hundred times. Eventually I got the pedal to come back a little. I never got the aux brake back 100%, but it did grab some again. I had talked to my dealer about it. I was told that because the foot brake is used so little (at least in my case) it loses prime on the hydraulics. I would suggest keep trying the bleeding some more (within reason). If it isn't going to work, it may need something else. Hope this helps.