Question about 1999 Chevrolet C/K 2500
There was also a problem with the hydro boost - master cyl. union. It's been a year or so since I read it, but there was a TSB or recall covering up to 1998 as I recall. But it's still the same design in 1999.
Do you have signs of fluid leaking on that side under the master cyl. / boost? I just replaced mine last week, but I spent a year adding power steering fluid every 3-4 weeks, having soft brakes (though never as bad as what you describe) and leaving power fluid puddles everywhere I parked.
The prescribed solution is to replace the booster and master cyl. I figured I'd replace the PS pump while I was going through all that trouble, and it had a lot of sludge and filings on the magnet inside. I'd do the trifecta if I were you.
Posted on Jan 27, 2009
Appreciate the "Ask Me" and my compliments, scary driving one of those in our roads.
Might you have to check the Brake Booster. Normally, there would be a vacuum line to the booster from the intake manifold. Common design calls for a PCV type valve at the entrance to the booster. Pls check this. It also operates on the same principle and therefore checks the same, you can blow one way but not the other; would have a sliding ball inside that acts as the valve. In some instances, it could be the diaphragm inside that might have a tear.
Of course, the Proportioning valve system must likewise be checked. I have heard a lot of brake problems with K2500 especially the rear drum.
Incidentally, there was a recall order of some sort. TSB 99-05-24-001A SEP 99 which addressed brake pull/wear, the recall involved replacing the proportioning valve.
Good luck and kind regards. Thank you for using FixYa.
Posted on Aug 10, 2008
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Posted on Jan 02, 2017
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Manufacturer GENERAL MOTORS CORP. Recall Date: 02/04/2004 Potential Number Of Units Affected: 68,875 Description SERVICE BRAKES, HYDRAULIC Summary CERTAIN SPORT UTILITY VEHICLES, PICKUP TRUCKS, AND PASSENGER VANS FAIL TO COMPLY WITH THE REQUIREMENTS OF FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 135, ?PASSENGER CAR BRAKE SYSTEMS.? SOME OF THESE VEHICLES WERE PRODUCED WITH AN OUT-OF-SPECIFICATION BRAKE HYDRO-BOOST HOUSING RELIEF VALVE BORE. Consequence CONSEQUENTLY, THE VALVE O-RING SEAL MAY FRACTURE. STEERING EFFORTS MAY BE SLIGHTLY INCREASED WHILE BRAKING OR PARKING. UNDER CERTAIN DRIVING CONDITIONS, A FRACTURED SEAL MAY REQUIRE A SLIGHT INCREASE IN THE APPLIED BRAKE PEDAL EFFORT TO ACHIEVE THE SAME VEHICLE DECELERATION RATE AS PRIOR TO THE SEAT FRACTURE. Remedy DEALERS ARE TO REPLACE THE HYDRO-BOOST RELIEF VALVE. THE RECALL BEGAN ON APRIL 26, 2004. OWNERS SHOULD CONTACT CADILLAC AT 1-866-982-2339; CHEVROLET AT 1-800-630-2438; GMC AT 1-866-996-9463; OR HUMMER AT 1-866-486-6376.
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