SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:HOSES, LINES/PIPING, AND FITTINGS
TRUCK PULLS WHEN BRAKING. TBS FIX IMPLEMENTED WITH LITTLE TO NO IMPROVEMENT. LAST TIME AT DEALER, DEALER SAID GMC HAS PROBLEM WITH 3/4TON SUBURBAN BRAKES BUT DOESN'T HAVE FIX. NOTHING HE CAN DO. TRUCK HAS HAD COMBINATION VALVE REPLACED, REAR SHOES REPLACED, FRONT PADS REPLACED (5X TOTAL), CALIPERS REPLACED, ROTORS REPLACED, TIE RODS REPLACED, IDLE ARM REPLACED, STEERING BOX AND PITMAN ARM REPLACED, FRONT BRAKE HOSES REPLACED, CONTROL ARM BUSHINGS REPLACED, AND ALIGNED SEVERAL TIMES WITH NO FIX TO THE PROBLEM. BRAKING AT HIGHWAY SPEEDS IT IS VERY DANGEROUS. YOU DON'T KNOW WHICH WAY THE VEHICLE WILL GO AND HOW HARD IT WILL TRY TO GET THERE. AS AN ENGINE DESIGNER I FIND IT AMAZING THAT GM HAS A HANDLING/SAFETY ISSUE OF THIS MAGNITUDE. THIS IS A BIG TRUCK TO HAVE SUCH A CONTROLABILITY PROBLEM. PLEASE HELP. A SHAULL
1985
SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:DIFFERENTIAL PROPORTIONAL VALVE