IMPROVED DRIVEABILITY NEW PROM RAISES TCC ENGAGE SPEED

A NEW PROM PART NUMBER 1226662 HAS BEEN RELEASED FOR SERVICE TO CORRECT THE FOLLOWING CONCERNS: - REDUCES DRIVEABILITY CONDITIONS WHILE COLD AND AFTER START. - RAISES TCC ENGAGEMENT SPEEDS TO 49 MPH TO REDUCE CHUGGLE COMMENTS. SHOULD YOU HAVE A CUSTOMER WITH THE ABOVE DRIVEABILITY CONCERNS, PROM PARTS NO. 1226662 SHOULD BE INSTALLED ONLY AFTER INSURING THAT ALL OTHER FUNCTIONAL ITEMS SUCH AS CHOKE SETTINGS, TIMING, ETC. ARE SET TO SPECIFICATIONS. PROMS ARE TO BE ORDERED FROM WDDGM IN THE NORMAL MANNER.

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.