ECM DAMAGE DUE TO ISC/TPS ADJUST 4 SECOND LIMIT

WHEN PERFORMING AN ISC/TPS ADJUSTMENT ON A DFI OR DEFI-EQUIPPED VEHICLE, THE ISC MOTOR MUST NOT BE HELD (STALLED) IN THE FULLY RETRACTED POSITION FOR MORE THAN 4 SECONDS BEFORE DISCONNECTING THE ISC CONNECTOR. IF HELD FOR MORE THAN 4 SECONDS, THE ECM MAY BECOME OVERSTRESSED, POSSIBLY RESULTING IN THE NEED FOR REPLACEMENT OF THE ECM AT LATER MILEAGE.

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.