Lightning Performance
Here For The Long Haul!
- Local time
- 3:33 PM
- User ID
- 677
- Joined
- Jan 26, 2016
- Messages
- 10,991
- Reaction score
- 28,058
- Location
- East of Philly
Beat you to it with ginger ale.lol going to the couch in the ac with coffee
I pulled of the kellsy Kelly whatever control head for the ABS unit in my 97' gmc pu. Mines right next to the master cylinder on the skirt. So it's a closed system valve oooo. That did nothing

Next, I might just pull that two wire brake switch on the block. Just to make sure that value is popping up under the switch. I can cycle the brake light now by pump it but no flow ya know?...
I Usually just bleed it by the pedal like any other car. The brake system still sucks imo but never had this issue before. The worst thing it does is the front will go off in the rain even with new tires on certain roads under light braking empty. No big deal really. Drove home on it on time from north Jersey with a blown rear line. Simple common fix both times. The truck has 330,000 on it now. Few issues besides brakes.
The master has been replaced sometime ago. Zero issues with it. The blown line was hell to get the air out last time but things worked correctly. Odd mfer.
Vacuum bleed might be worth a shot now or is this system better dealt with with master cylinder pressure?
IDK too much bs on the web to read. Opinions most times.