while driving motor would quit and start back up going slow motor would quit and powr steering would fail very dangerous had auto towed 2 times to jim johnson Pontiac bowling green ky they could not get it to do it they said finally had it towed again told them to drive it to where evert it done it for them they could not figure it out they called gm gm said to try ignition switch and body control module they wanted 811 dollars to do it and said cant guarantee that would fix it i picked up car they charged me 176 dollars to check it robbery i liked to never made it home keep quiting real bad finally made it home i am going to buy parts and fix it my self not going to pay 811 to them and might not fix the problem gmotors wont help either i feel when there is a verry dangerous problem with a 2006 auto they should be concerned i wounder if anyone else with Pontiac Montana has had same problem if so please e mail me filburn43@yahoo.com also anti lock brake system went bad at 45000 miles and stablationsystem light kept coming on they fixed anti brake system under warranty but would not fix stablesystem