Complete TSB Text
#01-05-25-004 Yellow: Traction Control/Handling Lamp On, Drivers Info Center Displays Service Active Hndlg (Handling) (Repair/Reprogram ABS Module)
#01-05-22-002 Incomplete Brake Pedal Return (Replace Vacuum Brake Booster)
#01-08-58-001 Windnoise Around B-Pillar (Add Sealer)
Thanks.
Yellow: Traction Control/Handling Lamp On and Driver's Info Center Displays Service Active Hndlg (Handling) (Repair/Reprogram ABS Module)
2001 Chevrolet Corvette
Condition
Some customers may comment that the "Yellow" message, "Service Traction Active Handling", is illuminated on the Driver's Information Center.
The technician may find chassis DTC C1288 -- Vehicle Stability Enhancement System (VSES) Steering Wheel Sensor Phase A and B. When this code is set, the VSES is turned off; ABS and TCS remain operational.
Correction
Verify the Techline equipment has been updated with TIS software 20.5 or newer. If it has not been updated, do so now. This software was broadcast to dealerships on January 1, 2001. CD #1 for 2001 was mailed in early January, 2001.
1. Install the scan tool to the vehicle.
2. Enter the chassis applications.
3. Select F1: ABS/TCS/VSES.
4. Select F4: ID Information.
5. Select F1: Controller Information 2.
A. If the DE Calibration P/N is 12212175 (this calibration went into production 11/30/00 after VIN 15114788), refer to the Service Information for diagnosis.
B. If the DE Calibration P/N is 12204887, it will be necessary to update the ABS module.
Important
The update cannot be performed until fuse #25 (Body Control Module-Ignition 1, Instrument Panel Control) 10 amp is removed from the Instrument Panel fuse block which is located on the passenger's side of the vehicle (under the Instrument Panel and under the toe board).
Without removal of the fuse (prior to requesting information), unsuccessful reprogramming may occur.
3. Power down the scan tool.
4. Turn OFF the ignition and remove the key.
5. Remove fuse #25, (Body Control Module-Ignition 1, Instrument Panel Control) 10 amp.
6. Using the scan tool, perform the usual SPS reprogramming of the ABS module.
7. Power down the scan tool.
8. Turn OFF the ignition and remove the key.
9. Replace fuse #25, (Body Control Module-Ignition 1, Instrument Panel Control) 10 amp.
10. Verify the ABS DE Calibration P/N. If it is not P/N 12212175, redo the SPS programing procedure listed above.
11. Clear the codes from all the modules.
Warranty Information
For vehicles repaired under warranty, use.
Labor Operation
Description
Labor Time
N8520*
ABS Module - Reprogram
0.6 hr
*This is a unique labor operation to be used only with this bulletin. It will not be published in the Labor Time Guide.
Incomplete Brake Pedal Return (Replace Vacuum Brake Booster)
2001 Chevrolet Corvette
Condition
Some owners may comment that after the brake pedal is released, the brakes appear to remain partially applied (light brake drag) and/or that the brake lights remain illuminated.
Cause
Condition may be due to vacuum brake boosters assembled with return springs that may exhibit inadequate force to completely return the brake pedal after a brake apply.
Correction
Replace the existing vacuum brake booster with a new booster, P/N 18046267, following the procedure contained in the applicable Service Manual.
Parts Information
Part Number
Description
18046267
Vacuum Brake Booster
Parts are currently available from GMSPO.
Warranty Information
For vehicles repaired under warranty, use:
Labor Operation
Description
Labor Time
H1220
Booster Assembly, Vacuum Power Brake - Replace
0.8 hr
(Automatic)
1.0 hr
(Manual)
Add
Vehicles With Telecoping Steering Column
0.2 hr
Windnoise Around B-Pillar (Add Sealer)
1999-2001 Chevrolet Corvette (Hardtop)
Condition
Some owners may comment on windnoise around the B-pillar.
Cause
The windnoise may be caused by a void in the sealer behind the B-pillar weatherstrip retainer.
Correction
Remove the weatherstrip retainer and the B-pillar exterior molding. Seal the void with GM RTV Silicone Rubber Sealant-Black, P/N 12345739 (in Canada, use P/N 10953541).
Parts Information
Part Number
Description
12345739 (U.S.)
10953541 (Canada)
GM RTV Silicone Rubber Sealant-Black
Parts are currently available from GMSPO.
Warranty Information
For vehicles repaired under warranty, use:
Labor Operation
Description
Labor Time
C1520
Retainer (RH), Weatherstrip Body Lock Pillar
0.4 hr
C1521
Retainer (LH), Weatherstrip Body Lock Pillar
0.4 hr
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