1993 GMC Jimmy brakes problems

Defect

THIS IS NOT A SAFETY RECALL IN ACCORDANCE WITH THE SAFETY ACT. HOWEVER, IT IS DEEMED A SAFETY IMPROVEMENT CAMPAIGN BY THE AGENCY. VEHICLE DESCRIPTION: CERTAIN LIGHT DUTY PICKUP TRUCKS, SPORT UTILITY VEHICLES, OR MINIVANS EQUIPPED WITH 3-SENSOR ABS (ANTILOCK BRAKING SYSTEM) EBC4 UNITS.

Consequence

THESE VEHICLES CAN EXPERIENCE EXTENDED STOPPING DISTANCES DURING ABS STOPS ON CERTAIN MULTIPLE SURFACES, INCREASING THE RISK OF A CRASH.

Remedy

DEALERS WILL MODIFY THE COMPUTER PROGRAM WHICH OPERATES THE ABS UNIT ON SOME VEHICLES, OR REPLACE THE COMPUTER ON OTHERS TO IMPROVE THE PERFORMANCE OF THE ABS ON THESE SURFACES.

Defect

VEHICLE DESCRIPTION: CERTAIN 4-WHEEL DRIVE PICKUP TRUCKS AND SPORT UTILITY VEHICLES EQUIPPED WITH ABS (ANTILOCK BRAKING SYSTEM) MANUFACTURED FROM SEPTEMBER 1989 THROUGH AUGUST 1996. UNDER CERTAIN DRIVING CONDITIONS THE SWITCH WHICH SIGNALS THE ABS SYSTEM WHETHER THE VEHICLE IS IN 2-WHEEL OR 4-WHEEL DRIVE CAN MALFUNCTION CAUSING INCREASED STOPPING DISTANCES DURING ABS STOPS WHILE IN THE TWO-WHEEL DRIVE MODE.

Consequence

IF THIS OCCURRED AT A TIME WHEN MINIMUM STOPPING DISTANCE WAS REQUIRED, A VEHICLE CRASH COULD OCCUR WITHOUT PRIOR WARNING.

Remedy

DEALERS WILL REPLACE OR REPAIR THE 4-WHEEL/2-WHEEL DRIVE SWITCH.