Component
SERVICE BRAKES, HYDRAULIC
Manufacturer
GENERAL MOTORS CORP.
What Happened
Your vehicle has a brake system issue with a small part called the brake hydro-boost housing relief valve. This part helps your brakes work smoothly.
Risk if Unfixed
If this part isn't fixed, the seal inside it might break, making it harder to press the brake pedal and increasing steering effort while braking or parking. This could make it harder to slow down your vehicle.
Free Fix
We'll replace the hydro-boost relief valve for free. You can contact Cadillac, Chevrolet, GMC, or Hummer to schedule an appointment starting June 18, 2004.
Show original NHTSA language
Original — What Happened
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.
Original — Risk if Unfixed
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.
Original — Remedy
DEALERS ARE TO REPLACE THE HYDRO-BOOST RELIEF VALVE. THE RECALL BEGAN ON JUNE 18, 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.
View full recall details →
Repairs are free at any authorized dealer. Find a dealer →