Power Brake Pedal Seems Stiff - The 1947 - Present Chevrolet & GMC Truck Message Board Network

sick472 · 04-19-2021, 10:46 AM

I'm new to power brake troubleshooting and not even sure if I have a problem. The truck just hit the road and the brake pedal seems stiff to me. It stops the truck fine and I can lay into the pedal an lock the wheels, but it takes a lot more leg muscle than my 85 K20. So much more that when I drove the 72 for a week and then hopped in the 85...I about threw myself through the windshield.

Where should I begin looking to make an improvement?

Note: It has a new master cylinder, prop valve, and 11" booster from GMC Paul's with stock 72 front disc brakes.

04-19-2021, 10:46 AM	#1
sick472 Registered User Join Date: Jul 2015 Location: Sedalia Mo. Posts: 1,130	Power Brake Pedal Seems Stiff I'm new to power brake troubleshooting and not even sure if I have a problem. The truck just hit the road and the brake pedal seems stiff to me. It stops the truck fine and I can lay into the pedal an lock the wheels, but it takes a lot more leg muscle than my 85 K20. So much more that when I drove the 72 for a week and then hopped in the 85...I about threw myself through the windshield. Where should I begin looking to make an improvement? Note: It has a new master cylinder, prop valve, and 11" booster from GMC Paul's with stock 72 front disc brakes. __________________ He who is without oil shall throw the first rod. Compressions 8.7:1 1972 C10 1976 C10 (parts truck) 1985 K20



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