Central Sequential Fuel Injection (Central SFI) X1-X6 (4.3L)

WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Central Sequential Fuel Injection (Central SFI) X1-X6 (4.3L) Connector End View

Courtesy of GENERAL MOTORS CORP.

Pin	Wire	Circuit	Function
X1-1	0.5 BK	1744	Fuel Injector 1 Control
X1-2	0.5 BK	1839	Ignition 1 Voltage
X2-1	0.5 BK	1745	Fuel Injector 2 Control
X2-2	0.5 BK	1839	Ignition 1 Voltage
X3-1	0.5 BK	1746	Fuel injector 3 Control
X3-2	0.5 BK	1839	Ignition 1 Voltage
X4-1	0.5 BK	844	Fuel Injector 4 Control
X4-2	0.5 BK	1839	Ignition 1 Voltage
X5-1	0.5 BK	845	Fuel Injector 5 Control
X5-2	0.5 BK	1839	Ignition 1 Voltage
X6-1	0.5 BK	846	Fuel Injector 6 Control
X6-2	0.5 BK	1839	Ignition 1 Voltage

Connector Part Information

OEM: 12597538 Part 2
Service: See Catalog
Description: 2-Way F Sealed (BK)

Terminal Part Information

Terminal/Tray: See Terminal Repair Kit
Core/Insulation Crimp: See Terminal Repair Kit
Release Tool/Test Probe: See Terminal Repair Kit