does anyone have this problem, under moderate braking on my brand new lmm (200 miles on it) it wants to dive to the left bad and this condition is not present under light braking.It concerns me because it will move over a half lane in a split second like your swerving to go around something in the road. I am affraid to let my wife drive it as it may not have a good outcome if it happens to her (I dont want her to get hurt the truck can be replaced).

Sounds to me like something you should take it back to the dealer for ASAP!

Sounds like it could be one of serveral possibilies from low tire pressure to pinched hyd brake line. Poor alignment will cause this but usually this is a brake problem. Probaby a pad hanging up or pinched line...whatever it is , it should be taken care of before you have to make a panic stop.

first thing I checked was tire pressures on the dic and then I checked how well the truck tracked down the road and it seemed to drive straight and the tire pressures were within a pound or 2. thanks for the help. I have the truck at the dealer now

Let us know what they find. Inquiring minds and all that. :D

sometimes one can fix this by sinking the brake peddal all the way to the floor. if there is a calliper stuck you may get lucky and this will free it...