David Saville

Replaced booster, all is good. I'm guessing the original vacuum pump is still good, I may hold on to it just in case, or just do the delete all together if I end up having issues with it.

Yes, I bought a 3/8 vacuum hose from Napa. My friend connected his snap on tester to the truck, I was getting 12lbs of vacuum with the vacuum pump with slow recovery, I was only getting 10 lbs with the vacuum coming from the manifold, but recovery time was quick

The brake pedal gets hard at low RPM, especially stopped at traffic lights and driving in parking lots, very bad when backing the boat down the ramp. I did allthe tests in the above video for the booster and it all passed. I do on occasion get the brake pedal to the floor and it feels like the brakes are grinding but I can't hear them, then when I rev up or accelerate, the brakes work fine. I get the brake assist light when I get the hard pedal and the floored pedal.

I have a 2018 5.3 Silverado,truck is not included in the recall, I replaced the vacuum pump, line and grommet. Still having brake issues, Yesterday I did the bypass from the intake manifold to the booster(I have a plug to disable AFM), I followed the video exactly, test drive did not go well, still have issues, any ideas on what to do next?