I have a 2001 Dodge Ram1500 every time I hit the brakes it pulls left. I have had it to my Chevy Dealer for 2 weeks and they can seem to figure it out. any advice?

 

Try a Dodge dealer.

 

Replace all of the brake hoses. One is probably collapsed if it isn't anything else that you've had checked.

 

Replaced every thing in the front including lines. The hoses where replaced a year ago and again last week.

 

proportioning valve?

 

flush the fluid lines as they may be contaminated
bad rubber hoses on front lines usually cause this problem

I would also try swapping the front rotors from one side to the other and see if the problem moves...

 

All that has been done already including the proportioning valve and the rotors.

 

Interesting, either it is something that was repaired (and is still a problem, bad part, etc.) or something that hasn't been checked. Do you have a broken coil spring? Could you have a problem with the master cylinder? Maybe you just need to drive it more to get the new parts to break in.
Steve

 

Is it a hard pull to the left or a mild one?