Your new booster is defective. Replace under warranty. How does the brake pedal feel with engine off?
Here is a typical hydro-boost diagram:
Brake system 2001 GMC,XXXXXext. cab.Problem: passenger side front brake keeps locking up, truck has had all four calipers and pads replaced. Brake booster assembly has been replaced, brakes have been bled, same caliper keeps locking up.Thx Eric
You need to check for ABS codes and do an electronic bleed with scanner. There is no spring in the right front brake other than the disc hardware that holds inner pad to caliper piston. This will not cause the problem you mentioned. You will need a bi-directional scanner with ABS functions such as Tech2. The big round seal inside the caliper is what retracts piston with brake pedal released. For only the right front brake to be engaged there has to be pressure in that line to that wheel only or caliper piston on that wheel is not retracting. There is a restiction in that line or piston seal is not doing the job it was intended. Check rotor runout & thickness. Check master cylinder reservoir rubber seal for swelling. If RF caliper is not releasing, the rotor will become warped. Did you replace the front brake hoses?