NHTSA (USA)Critical

September 11, 1997

1997 GMC SONOMANHTSA Campaign #97V146001

SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:HOSES, LINES/PIPING, AND FITTINGS

Defect

VEHICLE DESCRIPTION: LIGHT DUTY PASSENGER PICKUP TRUCKS EQUIPPED WITH 4.3L ENGINES. THE FRONT BRAKE LINE CAN CONTACT THE LEFT-HAND SIDE OF THE ENGINE OIL PAN CAUSING THE BRAKE LINE TO WEAR TO THE POINT OF BRAKE FLUID LOSS DURING BRAKE APPLICATION.

Safety Risk

BRAKE FLUID LOSS CAN REDUCE BRAKING EFFECTIVENESS AND INCREASE STOPPING DISTANCES RESULTING IN A VEHICLE CRASH WITHOUT PRIOR WARNING.

Remedy

DEALERS WILL INSPECT THE CLEARANCE BETWEEN THE OIL PAN AND THE BRAKE LINE. IF THE CLEARANCE IS 6MM OR LESS, DEALERS WILL INSTALL AN ADDITIONAL BRAKE LINE CLIP AND IF THERE WAS CONTACT BETWEEN THE OIL PAN AND BRAKE LINE, THE FRONT BRAKE LINE WILL BE REPLACED.