This could be bad for GM
Feds Probing 2.7M GM Trucks and SUVs Over Braking Issue LINK
Forum Discussion
Had no idea they went back to using vacuum for power brakes. Thought the hydroboost system was the choice for Diesels. The old GM Diesel car engines used hydroboost for the brakes but had a vacuum pump for the A/C controls. Those always failed early, hydroboost always worked. Ford gas F-53 Class A chassis use hydroboost.
