IDLE ROUGHNESS MORE PREVALENT IN HIGH ALTITUDES (NEW PROM)

Subject: IDLE ROUGHNESS

Model and Year: 1990 CAPRICE WITH 5.7L TBI

Condition: Some owners of 1990 B cars with 5.7L (VIN 7, L05 V8) engine may comment about idle roughness. This condition may be more prevalent at altitude.

Correction: The calibration has been refined to address idle speed control. Replace the PROM with the following part number.

Broadcast Scanner Part Code I.D. Number Body Application ---- ----- -------- --------------------------- AXWD 2831 16162838 5.7L L05 Nationwide Emissions

Parts are currently available from GMSPO.

Labor Operation: T0500

Labor Time: 0.5 Hours

Trouble Code: 92

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.