For 1990-2009 cars

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

#### SUBJECT: SERVICE MANUAL UPDATE - SECTION 6E3 - REVISED KNOCK SENSOR SYSTEM CHECK (CHART C-5)

#### VEHICLES AFFECTED: 1993 "A AND N" W/3300 (LG7) ENGINE

The attached revised C-5 Knock Sensor System Chart information should be used when diagnosing the knock system on 1993 "A" and "N" Carlines with 3300 (VIN N - RPO LG7) MFI engine.

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.