GM Service Manual Online
For 1990-2009 cars only

REVISED TCC/EGR ELEC.SCHEMATIC SERVICE MANUAL INFORMATION

THE ELECTRICAL WIRING DIAGRAMS PROVIDED IN THE 1982-83 "WIRING DIAGRAMS MANUAL", AS WELL AS, THE "1983 CANADIAN PASSENGER CAR AND LIGHT DUTY TRUCK SERVICE MANUAL SUPPLEMENT" FOR F-CARS WITH 2.8L V6 (LC1) DO NOT SHOW AN EGR BLEED SOLENOID. THE SOLENOID IS ELECTRICALLY CONTROLLED, ENERGIZING WHEN THE TRANS- MISSION IS IN 3RD GEAR (EXCEPT WHEN BRAKING) TO REDUCE THE VACUUM SIGNAL AT THE EGR VALVE. (SEE 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.