2 parter! Where did my power brakes go? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Tom · 01-22-2023, 07:55 PM

First Q- I recently removed the engine from my truck to re-seal it and change a torque convertor. Everything went back together fine, only to find out I have no power brakes. Nothing in the brake system was touched while the engine was out. I confirmed vaccum to booster. So, I threw a new booster at it. Still no power brakes. 1 way valve works good too. Where could my power have gone?

Second Q, whats the box that attaches to the brake rod coming from the booster, goes where the pedal meets the rod? Brake light switch?

**Palf70Step** · 01-23-2023, 09:11 AM

The only thing I can think of is the ABS module or the Master cylinder it self. Both of those are knownweak spots in these year trucks.

Since I no longer have one to crawl and look at I cannot visualize the second question.

v30crewcab · 01-26-2023, 08:40 PM

yes thats the brake light switch.

01-22-2023, 07:55 PM	#1
Tom driving is in my blood Join Date: Dec 1999 Location: Mesa AZ Posts: 5,690	2 parter! Where did my power brakes go? First Q- I recently removed the engine from my truck to re-seal it and change a torque convertor. Everything went back together fine, only to find out I have no power brakes. Nothing in the brake system was touched while the engine was out. I confirmed vaccum to booster. So, I threw a new booster at it. Still no power brakes. 1 way valve works good too. Where could my power have gone? Second Q, whats the box that attaches to the brake rod coming from the booster, goes where the pedal meets the rod? Brake light switch? __________________ -78 c10 short/step: 388cid, M20, 5/5 drop, lots more. Playtoy and first vehicle. -98 c1500 x-cab: 5.7L, 17" rims, 5/6 drop, flowmaster, helper bags,NBS rear disk brakes. -02 Suburban 4x4: leveled front -CBR600F4i, CBR600RR, CBR1000RR, and standup skis DISCLAIMER: I cant spell for the life of me.

01-23-2023, 09:11 AM	#2
Palf70Step State of Confusion! Join Date: Jul 2002 Location: Gulfport, MS USA Posts: 46,611	Re: 2 parter! Where did my power brakes go? The only thing I can think of is the ABS module or the Master cylinder it self. Both of those are knownweak spots in these year trucks. Since I no longer have one to crawl and look at I cannot visualize the second question. __________________ Bill 1970 Chevy Custom/10 LWB Fleetside 2010 Toyota Tacoma PreRunner SR5 Double Cab - DD Member of Louisiana Classic Truck Club (LCTC) Bill's Gallery Life isn't tied with a bow, but it's still a gift. Live simply. Love generously. Care deeply. Speak kindly. Leave the rest to God! Last edited by Palf70Step; 01-26-2023 at 09:07 PM.

01-26-2023, 08:40 PM	#3
v30crewcab Registered User Join Date: Apr 2012 Location: Chatt Tn Posts: 957	Re: 2 parter! Where did my power brakes go? yes thats the brake light switch. __________________ 88 military v30 crewcab shortbed 5.9 cummins, nv4500, 205 86 k30, 89 diesel burb, 76 gmc pathfinder 71 longbed 5.3 4l80 http://67-72chevytrucks.com/vboard/s...d.php?t=522535



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.