Corvette V8-5.7L VIN G (1997)
Technical Service Bulletin # 04006C
Date: 060208
Recall - Electronic Steering Column Lock System Defect
Bulletin No.: 04006C
Date: February 08, 2006
SAFETY
Subject:
04006C - Electronic Column Lock System
Models:
1997-2004 Chevrolet Corvette Equipped with a Manual Transmission
1997-2000 Chevrolet Corvette Equipped with an Automatic Transmission
2001-2004 Chevrolet Corvette Equipped with an Automatic Transmission - European Export Only
Supercede:
THIS BULLETIN CANCELS AND REPLACES BULLETIN 04006B, ISSUED NOVEMBER 2004. THE SERVICE PROCEDURE FOR U.S.
VEHICLES EQUIPPED WITH A MANUAL TRANSMISSION HAS BEEN REVISED. PLEASE REVIEW THIS NEW INFORMATION
IMMEDIATELY. ALL COPIES OF BULLETIN 04006B SHOULD BE DESTROYED.
Condition
General Motors has decided that a detect, which relates to motor vehicle safety, exists in certain 1997-2004 model year Chevrolet Corvette vehicles.
When you remove the ignition key, the electronic column lock (ECL) system prevents turning of the steering wheel. When the vehicle is started, it
unlocks the steering. Two conditions can prevent steering while the vehicle is moving:
1.
The vehicle is designed so that if the column fails to unlock when the vehicle is started, the fuel supply will be shut off if the driver tries to move
the vehicle. If voltage at the powertrain control module is low or interrupted, however, the fuel shut off may not occur and the vehicle can be
accelerated while the steering is locked.
2.
During quick cranks, the ECL lock pin may not withdraw fully and, in vehicles where there is abnormally low clearance to the lock plate, there
may be contact between the pin and lock plate. This can cause a noise or ratcheting when the steering wheel is turned, or if there is insufficient
clearance, the steering wheel cannot be turned.
If one of these conditions occurs, a crash could occur without warning.
Correction
Dealers are to remove the column lock plate on U.S. and Canadian vehicles equipped with an automatic transmission. After the service correction, the
steering column will no longer lock when the key is removed.
On vehicles equipped with a manual transmission, and export vehicles equipped with an automatic transmission, dealers are to 1) reprogram the PCM,
and 2) verify there is adequate lock plate clearance and, if necessary, replace the lock plate. After the service correction, the steering column will
continue to lock when the key is removed.
Vehicles Involved
