1995 GMC Jimmy factory recall on abs brake problem

1995 GMC JIMMY
111,000 MILES • 6 CYL • 4WD • AUTOMATIC
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JWM54
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The factory has a recall out to repair an abs braking problem.

JUL 19, 1999 | Recall ID# 59283 Hide Details
Recall Reason SERVICE BRAKES, HYDRAULIC:ANTILOCK
Recall Date JUL 19, 1999
Model Affected JIMMY
Potential Units Affected 1125749

Recall Summary
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.

Notes
GENERAL MOTORS CORP. 99041

I took my GMC to a dealer to have this recall done. They did not replace the 2wd/4wd selector switch on the dash. The service manager said they replaced a vacuum switch, a wire harness and 2wd/4wd switch under the hood. This did not fix the problem. Can you tell me if they should have replaced the dash switch. The part number for the dash switch is 15152504.
Jan 11, 2008 at 7:50 PM
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MASTERTECHTIM
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you say it did not fix the problem. what is the problem?
Jan 11, 2008 at 7:59 PM
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JWM54
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The problem is, when in 2wd when you brake on slick surfaces you can hear the ABS system ratcheting or clicking and all the brakes are locked. the car just slides. The reason I asked my original question was to see which parts the dealer was supposed to replace. I bought a new 2wd/4wd selector switch (the one on the dash) and installed it, the system seems to be working correctly now, but I will have to wait until we get some more weather to really see if she's fixed.
Jan 12, 2008 at 8:15 AM
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MASTERTECHTIM
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NOW I UNDERSTAND. THE 4WD SWITCH IN THE DASH SHOULD HAVE NOTHING TO DO WITH IT. WHAT THAT RECALL DOES IN REPLACING THE VACUUM SWITCH AND ACTUATOR SENSOR. ITS BECAUSE WHEN YOU HAVE THE TRUCK IN 2WD THE VACUUM SWITCH DOES NOT RELEASE THE FRONT DIFFERENTIAL. THE TRANSFER CASE IS NOT CONTROLLING THE FRONT DIFFERENTIAL BUT BECAUSE THE VACUUM SWITCH FAILS IT KEEPS THE FRONT DIFFERENTIAL LOCKED. WITH THE FRONT DIFF LOCKED THE FRONT DRIVE SHAFT WILL SPIN BUT IT IS NOT ENGAGED IN THE TRANSFER CASE. I HOPE THIS MAKES SENSE.
Jan 12, 2008 at 10:30 AM
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JWM54
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Yes that makes sense. Well maybe now that the recall has been done, all the front axle hardware not spinning will give me a little better mileage. Thanks for the help.
Jan 12, 2008 at 11:42 AM