Harmonic Balancer, Ignition Module - Revised Information

Bulletin Number:
93-6-20
Reference Number:
216524
Publish Date:
1/93



Subject:
SERVICE MANUAL UPDATE - SECTION 6E3 "DRIVEABILITY AND EMISSIONS", UPDATED HARMONIC BALANCER AND IGNITION MODULE

Models
Affected:
1993 GRAND AM 3300 (VIN N)


This Bulletin revises Service Manual Section 6E3, "Driveability and Emissions", for the 1993 Grand Am models equipped with the 3300 (VIN N - RPO LG7) Engine. This Bulletin contains information on the Updated Harmonic Balancer and Ignition Module used for the 1993 Model Year. Refer to "System Components - Crankshaft Position Sensor - Harmonic Balancer Interrupter Rings" in the 1993 Bonneville Service Manual for the 3300 Engine System which is similar to the 3800 Engine System. See Page 6E3-C4-2 for a complete description of the revised system.

Please make the appropriate change to the Service Manual from the former 1X Signal to the updated 18X Signal on the following facing pages Circuit Diagram:

3300 (VIN N) MFI Grand Am Models
Chart A-3 (1 of 2) Facing Page
Chart A-3 (2 of 2) Facing Page
DTC 42 Facing Page
Chart C-4-1 Facing Page
Chart C-4-2 Facing Page

IMPORTANT:

The 3300 (VIN N) and 3800 (VIN L) Harmonic Balancers and Ignition Modules are NOT interchangeable.