Electrical - Service Manual Circuit Revision

File In Section: 6E - Engine Fuel & Emission

Bulletin No.: 51-65-20

Date: April, 1995

Subject:
Sections 3A, 6E3 and 7A1 4C - Driveability Emissions and Electrical Diagnosis - Revised Circuit Callout

Models:
1994 Chevrolet and GMC Truck S/T Models
with 2.2L, 4.3L Engines (VINs 4, W, Z - RPOs LN2, L35, LB4)

1993 Oldsmobile Bravada
with 4.3L Engine (VIN W - RPO L35)

This bulletin is to advise of an incorrect circuit callout in the following service manuals:

1993 Oldsmobile Bravada Service Manual, Section 6E3, pages:

6E3-A5
6E3-A11
6E3-A44
6E3-B24
7A14C-22
7A140-38
7A14C-60
7A14C-79
7A14C-84

1994 S/T Driveability Emissions and Electrical Diagnosis Manual, pages:

3A-86
3A-94
3A-135
3A-148
3A-152
3A-156
3A-162
3A-166
3A-170
3A-174
3A-178
3A-182

The correct circuit call is as follows:

PCM Connector (F) - Pin 12 circuit should be: 1697 BRN/WHT

PCM Connector (F) - Pin 13 circuit should be: 437 BRN.