Express 3/4 Ton Van V8-4.8L VIN V (2003)
Hydraulic Brake Booster: All Technical Service Bulletins
Recall 04V045000: Possible Hydro-Boost Defect
DEFECT: 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. 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 also require an increase in the applied brake pedal effort to achieve the same vehicle deceleration.
REMEDY: Dealers are to replace the hydro-boost relief valve. The manufacturer has reported that owner notification is expected to begin during the
second quarter of 2004. Owners may 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.
