I just had a shop put a new engine 6.5 Turbo Diesel in my 1996 K2500 3/4 ton 4x4 Chevy Suburban. I got it back and now I lose power to my brakes and steering at the same time. It happens most of the time when I get off the freeway. If I give it a little throttle the power comes back. I have a new engine, injectors, water pump, fuel lift pump, crank sensor, starter, vacuum pump, injection pump, belt, glow plugs and turbo. The front pads and rotors need to be replaced but I can't see how that would cause the issue I am having. Does anyone know what might be the problem? Does the power steering pump or steering box need to be replaced? Did the shop not put it back together right? I checked and the reservoir has fluid. Is there air in the system? The shop just blew me off but I don't want to pay another shop to fix something that another shop is responsible for. Also I keep hearing this strange noise it sounds like a combination of gear whine and air pressure blowing past a rubber seal. This is in addition to the whistle from the turbo the mechanic said it was normal but I have never heard this sound in any other turbo charged vehicle gas or diesel.