For 1990-2009 cars

# DIESEL ELC WIRING ELC A/C COMP. RELAY CONN.

ELC WIRING ON SOME DIESEL C-CARS ON SOME DIESEL C-CARS, THE ELECTRONIC LEVEL CONTROL WIRING IN THE RELAY CENTER MAY BE INCORRECT, CAUSING THE COMPRESSOR TO RUN CONTINUOUSLY. THE ELC RELAY CONNECTION IN THE RELAY CENTER HAS 5 CAVITIES AND 4 WIRES; THE CENTER CAVITY SHOULD BE BLANK. THE INCORRECT AND CORRECT WIRING SCHEMES ARE SHOWN BELOW. * ILLUSTRATION *

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.