Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET1983BLAZER FULL SIZE V8-350 5.7LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSENGINE CONTROL MODULETECHNICAL SERVICE BULLETINSECM - PACKARD 32 WAY CONNECTOR IDENTIFICATION
1983 Chevrolet Blazer Full Size V8-350 5.7L
ECM - Packard 32 Way Connector Identification
1983 Chevrolet Blazer Full Size V8-350 5.7LSECTION ECM - Packard 32 Way Connector Identification
9214chevy01
Number: 90-56-8
Section: 8
Date: September 1989
Corporate Bulletin No.: 916521R
Subject: PACKARD 32 WAY CONNECTOR IDENTIFICATION
Model and Year: 1980-90 A, B, F, G, J, L, W, Y CARS AND ALL TRUCKS WITH GMP4 ECM APPLICATIONS
TO: ALL CHEVROLET DEALERS
This bulletin serves to clarify the labeling of the Packard 32 way connectors used on the GMP4 under dash ECMS.
Currently a common strain relief is used in both the C-D 32 pin and the E-F 32 pin connectors. To properly identify these connectors, the strain reliefs must be removed. Use the lettering on the connector as shown on figure.
The colors used at this time for the 32 pin E-F connector are yellow, mint green or orange.
This updates any previous information released concerning identification that indicates any of these colors as being C & D connectors, found in the 6E and 8D Sections of the affected Service Manuals.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.