Mitchell27fadely
New User
I just bought a 1991 gmc topkick with a 366 engine. Most of the information tags are faded but I think it s a c70. It s been sitting for 3 years but I got it running by jump starting it fairly easy. There wasn t much fuel left in it so I added a fuel cleaner and then fresh gas. It doesn t run great but it s not running to rough either. I think it s running rich but don t know how to adjust that. The next issue is all 4 brakes are locked up. If I disconnect the brake lines it can be towed and rolls just fine, but if I bleed it and reconnect it, I can drive it anywhere because the brakes lock up again. Any help would be greatly appreciated.