INTERMITTENT NO START CAUSED BY ANTI-THEFT SYSTEM

Some 1986-87 Corvettes have been returned to dealerships for repair because of an intermittent no-start condition. In some cases, the vehicle may start after waiting for approximately 2 minutes.

This condition could be caused by a damaged ignition lock cylinder or damaged resistor pellet inside the ignition key. This causes the VATS module to sense an intermittent resistance value or open circuit at the pellet, which then shuts the system down for approximately 2 minutes. (Refer to the 1986 Corvette Shop Manual pages 8A-133-6 through 8A-133-13 or the VATS Pro Tech PTF-1 booklet for a moredetailed description of the system.)

An improved ignition lock cylinder with a narrower keyway and an improved longer ignition key are now available from GMSPO to repair vehicles with this condition. Vehicles that come in for other mechanical lock cylinder problems should also have the improved lock cylinder installed.

PARTS INFORMATION Ignition Lock Cylinder P/N 26008775

IGNITION KEY PART NUMBERS 26009031 Code # 1 26009032 Code # 2 26009033 Code # 3 26009034 Code # 4 26009035 Code # 5 26009036 Code # 6 26009037 Code # 7 26009038 Code # 8 26009039 Code # 9 26009040 Code #10 26009041 Code #11 26009042 Code #12 26009043 Code #13 26009044 Code #14 26009045 Code #15

New keys (3) must be ordered when replacing the lock cylinder. Check the old key to obtain the proper code to order using the (J35628) VATS Interrogator. Original design lock cylinders will operate with new design keys, however, new design lock cylinder, P/N 26008775, will not operate with original design keys.

Notice: Vehicles built after VIN H5120579 have the improved lock cylinder and longer keys in them.

Use applicable labor operation.

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.