I have a question regarding the brake system on my 2007 Cobalt LT.
The brakes are hanging up, the brake pedal is really stiff with little to no movement when this happens.
I've performed the following:
1) removed and cleaned, re-adjusted rear shoes,
2) removed and cleaned, (all parts) of front calipers
shoes and pads are about 6 weeks old ( less than 2,000 miles )
3) inspected all hoses and metal brake lining
4) replaced the master cylinder, bled all old fluid and replaced with new fluid.
The brakes still slightly hang up, the brake pedal is no longer very still, but now the pedal does not return the whole way out when applied. The pedal can be lifted about 1 inch with my foot and the brakes are then free.
The only remaining system part that I can think of is the booster. Can anyone suggest what might be the problem?