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 MANUALSPONTIAC1989GRAND PRIX V6-191 3.1LREPAIR AND DIAGNOSISRELAYS AND MODULESRELAYS AND MODULES - POWERTRAIN MANAGEMENTRELAYS AND MODULES - COMPUTERS AND CONTROL SYSTEMSENGINE CONTROL MODULETECHNICAL SERVICE BULLETINSECM - PACKARD 32-WAY CONNECTOR IDENTIFICATION
1989 Pontiac Grand Prix V6-191 3.1L
ECM - Packard 32-Way Connector Identification
1989 Pontiac Grand Prix V6-191 3.1LSECTION ECM - Packard 32-Way Connector Identification
89Pontiac20
Bulletin Number: 90-6-4
Reference Number: 916521R
Publish Date: 9/89
Subject: PACKARD 32 WAY CONNECTOR IDENTIFICATION FOR ALL GMP4 ECM APPLICATIONS
Models
Affected: 1981-90 6000, SAFARI WAGON, FIREBIRD, BONNEVILLE, SUNBIRD, GRAND AM, FIERO AND GRAND PRIX MODELS
This bulletin has been revised to include the 1990 model year and to add reference to the 6E and 8D Sections of the Service Manual in the last paragraph.
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 connector. To properly identify these connectors, the strain reliefs must be removed. Use the lettering on the connector as shown on the attached document.
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.
Bulletin Number: 90-6-4
Reference Number: 916521R
Publish Date: 9/89
Subject: PACKARD 32 WAY CONNECTOR IDENTIFICATION FOR ALL GMP4 ECM APPLICATIONS
Models
Affected: 1981-90 6000, SAFARI WAGON, FIREBIRD, BONNEVILLE, SUNBIRD, GRAND AM, FIERO AND GRAND PRIX MODELS
This bulletin has been revised to include the 1990 model year and to add reference to the 6E and 8D Sections of the Service Manual in the last paragraph.
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 connector. To properly identify these connectors, the strain reliefs must be removed. Use the lettering on the connector as shown on the attached document.
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
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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.