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Home >> Cadillac >> 2012 >> Escalade EXT >> Repair and Diagnosis >> External Pages >> Different car >> Section 1925 (OEM Connector End Views - Sierra & SILVERADO - Cooling System, Data Communication, Displays & Gauges, Electrical Center, Engine Control Module, Engine Controls) >> Engine Controls Connector End Views (4.3L) >> Central Sequential Fuel Injection (SFI) Connector End View X1-X6
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Central Sequential Fuel Injection (SFI) Connector End View X1-X6

WARNING: This page is about a different car, the 2007 GMC Sierra and 2007 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Central Sequential Fuel Injection (SFI) X1-X6 Connector End View
GM1903781Courtesy of GENERAL MOTORS CORP.
Central Sequential Fuel Injection (SFI) X1-X6 Connector Parts Information

Connector Part Information 
  • OEM: 12597538 Part 2
  • Service: See Catalog
  • Description: 2-Way F (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
Central Sequential Fuel Injection (SFI) X1-X6 Connector Terminal Identification

Pin Wire Color Circuit No. Function
X1-1 0.5 TN 1744 Fuel Injector 1 Control
X1-2 0.5 PK 1839 Ignition 1 Voltage
X2-1 0.5 L-GN/BK 1745 Fuel Injector 2 Control
X2-2 0.5 PK 1839 Ignition 1 Voltage
X3-1 0.5 PK/BK 1746 Fuel injector 3 Control
X3-2 0.5 PK 1839 Ignition 1 Voltage
X4-1 0.5 L-BU/BK 844 Fuel Injector 4 Control
X4-2 0.5 PK 1839 Ignition 1 Voltage
X5-1 0.5 TN/WH 845 Fuel Injector 5 Control
X5-2 0.5 PK 1839 Ignition 1 Voltage
X6-1 0.5 YE/BK 846 Fuel Injector 6 Control
X6-2 0.5 PK 1839 Ignition 1 Voltage
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