GMC Troubleshooting Questions? Ask a Mechanic for Answers
Thank you...I believe you're on the right tracks, 'cus there are no leaks anywhere.
1. When you say use the ABS you mean apply the brakes at say 10MPH on gravel or ice?
2. Where can I borrow a scan tool? Or are they cheap and I can buy one? How can I look it up on the internet? E.g., "ABS Scan Tool".
OK, great thanx.
a. In regards XXXXX XXXXX gravel / ice test: If the ABS light is on and the ABS doesn't appear to be working, is this still a valid test?
b. Air in the ABS has to go somewhere, so does it get released into the brake system (pipes) and thus require bleeding again?
c. In regards XXXXX XXXXX I tried pressure bleeding, but I could never get enough pressure into the resavoir because the fluid would squirt out of the top. So I'm left with gravity or the wife on the pedal. I'd prefer gravity bleeding 'cus the wife's too busy. So my question is, is gravity bleeding 100%? I bleed into bottles with a little fluid at the bottom so not to suck up air.