Bonneville V6-3800 3.8L Supercharged (1992)
Wheel Speed Sensor: All Technical Service Bulletins
Brakes - Pedal Pulsation When Applying ABS
Bulletin Number: 92-5-19
Reference Number: 105002R
Publish Date: 7/92
Subject:
ABS BRAKE PEDAL PULSATION WHEN APPLYING BRAKES (NEW WHEEL SPEED SENSOR)
Models Affected:
1991-92 BONNEVILLE MODELS
THIS BULLETIN IS BEING REVISED TO ADD 1992 MODEL YEAR, ADD NEW PART NUMBER FOR WHEEL SPEED SENSOR, MODIFY
THE CONDITION AND DIAGNOSIS AND CORRECTION SECTIONS, AND ADD WARRANTY INFORMATION. THIS BULLETIN CANCELS
AND REPLACES BULLETIN 91-5-12 ISSUED 5/91.
VIN BREAKPOINTS INVOLVED ARE:
1991
1992
ALL W/JM4
SOP-N1308405
CONDITION:
Owners may notice brake pedal vibration (ABS cycling) and the pedal may drop approximately one inch at the end of a brake stop. This usually happens
when decelerating below 10 mph and the brakes are not applied hard enough and road conditions are not such to activate the Antilock System.
CAUSE:
This condition may be caused by moisture intrusion into the rear wheel speed sensor.
DIAGNOSIS AND CORRECTION:
The pedal vibration (ABS cycling) due to moisture intrusion may or may not set a trouble code. Use a Tech I or CAMS to read any trouble codes that
may be stored in the EBCM. Follow the service manual procedure to repair any stored codes.
If any of the rear wheel speed sensor codes are stored or if no trouble codes are stored, replace both rear wheel speed sensors, clear codes, and road test
the vehicle before replacing any other Antilock System Component.
REPLACEMENT PARTS:
A new rear wheel speed sensor kit, Part No. 10457166 (1 per box) has been released for service. This sensor can be identified from previous (grey)
sensor by the BLACK color.
Parts are currently available from GMSPO.
WARRANTY INFORMATION:
Labor Operation No.:
T5305
Labor Time:
1.2 hr.
