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Service bulletin 04006A

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10012082
Published by NHTSA2005-02-11
Manufacturer's number04006A
Manufacturer's date2004-11-23
Replaces04006B
NHTSA componentSTEERING:COLUMN LOCKING:ANTI-THEFT DEVICE

NHTSA's summary

ELECTRONIC COLUMN LOCK SYSTEM. THIS BULLETIN CANCELS AND REPLACES BULLETIN 04006A, ISSUED JULY 2004. *TT

The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

Components

Steering

Vehicles listed
CHEVROLET CORVETTE1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
04V2730002004-06-09. STEERING:LINKAGES
20040522004-02-09. Steering
04V0600002004-02-09. STEERING:COLUMN LOCKING:ANTI-THEFT DEVICE

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
PIC65222023-12-04. Service bulletin. This Preliminary Information communicates diagnostic information to dealership techs to assist them in diagnosing either a "Service Column Lock" or a "Pull Key, Wait 10 Seconds" message on the DIC.
03-00-91-001I2023-11-22. Service bulletin. This service bulletin provides a vibration analysis worksheet the technician can use in conjunction with the appropriate Vibration Analysis-Road testing procedure when diagnosing vibration concerns.
PIC3278G2017-08-15. Service bulletin. This Preliminary Information communication provides information to the technician the steps needed to diagnose and repair the vehicles that may have unwanted or phantom phone calls. Technician will need to determine what type of call the customer is having that is unwanted. The vehicle may receive an incoming call just like any other phone. Typically the customer will hear the phone ringing in the vehicle. This scenario also includes incoming Bluetooth calls. One type of unwanted call can be made if the key pad is faulty the OnStar system will try to make a blue button call for shorted voltage in the circuits. The OnStar module could have an internal fault and produce a ″Phone Unavailable″ audio message also it may have a Diagnostic Trouble Code U1500 or B1000. Refer to diagnostics for the Diagnostic Trouble Code making sure to follow any applicable Bulletins or Preliminary Information sheets. A “Ready” or “OnStar ready” audio message heard while driving. In some cases it has been found that the customer is inadvertently pressing the ″push to talk″ button on the steering wheel controls. On rare occasions, other issues in the steering column or Steering Wheel Control system may induce this concern.
PIP4404E2017-08-15. Service bulletin. This Preliminary Information communication provides information to the technician vehicles with a slight rough idle. Technician should compare the concern with a like vehicle. If the concern is worse than a like vehicle, technician should follow published Service Information diagnosis and repair as necessary.
050812006-04-25. Service bulletin. SPECIAL POLICY ADJUSTMENT-ELECTRONIC COLUMN LOCK SYSTEM. THE COLUMN LOCK MAY FAIL TO UNLOCK THE STEERING COLUMN WHEN THE VEHICLE IS STARTED. *TT
0502350042005-11-09. Service bulletin. REVISED STEERING COLUMN TURN SIGNAL CANCEL CAM AND STEERING SHAFT UPPER BEARING SPRING REPLACEMENT (MANUAL AND TELESCOPING) PROCEDURE. *TT
34752005-05-12. Service bulletin. TELESCOPING COLUMN MOVES WITH SEAT SWITCH. *TT
021220042005-04-06. Service bulletin. A CONDITION IN WHICH THE VEHICLE CAN OPERATE WHEN THE ELECTRONIC STEERING COLUMN FAILS TO UNLOCK. *TT
0402350032005-03-11. Service bulletin. REVISED STEERING WHEEL AND COLUMN DIAGNOSTICS. *TT
0302360022005-03-08. Service bulletin. REVISED STEERING WHEEL POSITION SENSOR OR STEERING SHAFT LOWER BEARING REPLACEMENT PROCEDURE AND STEERING WHEEL POSITION SENSOR CENTERING PROCEDURE. *EH