A/C VACUUM SOLENOID MODULE TESTING PROCEDURE

WHEN DIAGNOSING THE A/C SYSTEM ON AN STE, THE A/C VACUUM SOLENOID MODULE MUST BE TESTED WHILE BEING HELD IN THE SAME POSITION AS MOUNTED IN THE CAR.

IF TESTED IN ANY POSITION OTHER THAN THE MOUNTING POSITION, THE A/C SYSTEM WILL NOT WORK AND FALSE READINGS WILL RESULT.

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.