For 1990-2009 cars

# SERVICE MANUAL UPDATE-SEC. 6E3 REVISED KNOCK SENSOR SYS.

#### SUBJECT: REVISED KNOCK SENSOR - SYSTEM CHECK (CHART C-5)

#### MODELS/YEARS: 1993 CUTLASS CIERA AND ACHIEVA W/3300 (VIN N) ENGINE

The attached revised C-5 Knock Sensor System Chart information should be used when diagnosing the knock system on 1993 Cutlass Ciera and Achieva models with the 3300 (VIN N - RPO LG7) MFI engine. Please update page 6E3-C5-5 of your copy of the 1993 Cutlass Ciera and Achieva Service Manual.

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.