The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post

**Stocker** · 05-01-2022, 01:22 PM

Have you tried pressing on the brake pedal very hard? That's supposed to center the prop valve piston, at least in some cases.

05-01-2022, 01:22 PM	#12
Stocker 20' Daredevil (Ret) Join Date: May 2003 Location: Jefferson State Posts: 13,824	Re: Proportioning valve Have you tried pressing on the brake pedal very hard? That's supposed to center the prop valve piston, at least in some cases. __________________ - Mike - 1972 K20 LWB 350/350/205 RIP El Jay