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.

2005 GMC Jimmy Part Time, StandardFACTORY OEM SERVICE PROCEDURE

Ignition Control Module (ICM) Connector End View

Ignition Control Module (ICM)

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		12162189 4-Way F Metri-Pack 150.2 Series, Pull-to-Seat Sealed (BLK)
Pin	Wire Color	Circuit No.	Function
A	PNK	439	Ignition 1 Voltage
B	WHT	423	IC Timing Control
C	BLK/WHT	451	Ground
D	WHT/BLK	1847	Ignition Coil Control

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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.