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Component Locations

NOTE: For connector terminal identification, see Fig 1-Fig 5 .
COMPONENT LOCATIONS

Component Location
Automatic Transfer Case (ATC) Control Module Behind Headlight Switch
Body Control Module (BCM) On Lower Left Side Of Instrument Panel, Below Steering Column
Body Wiring Harness Junction Block Below Left Side Of Instrument Panel, Near Left Kick Panel
C100 Connector (1) Below Engine Wiring Harness Junction Block
C152 Connector (2) Below Engine Wiring Harness Junction Block
Electronic Brake Control Module (EBCM) In Engine Compartment, On Left Inner Frame Rail
Electronic Variable Orifice (EVO)/Passlock™ Module Below Center Of Instrument Panel
Engine Coolant Temperature (ECT) Sensor On Left Side Of Engine, Near No. 1 Spark Plug
Engine Oil Pressure Sensor (OPS) In Top Rear Of Engine, To Left Of Center
Engine Oil Temperature Sensor On Left Side Of Engine, Above Oil Filter
Engine Wiring Harness Junction Block Left Side Of Engine Compartment, Near Battery
Fuel Pump In Fuel Tank
Fuel Level Sender On Fuel Pump
Fuse Block On Lower Left Side Of Instrument Panel
Linear Shift Assembly Mounted On Steering Column Support Assembly
Low Engine Coolant Level Indicator Module Below Right Side Of Instrument Panel
Low Engine Coolant Level Indicator Sensor Front Of Engine Compartment, Under Engine Coolant Recovery Tank
Park/Neutral Position (PNP) Switch On Left Side Of Transmission
Park Switch Part Of Linear Shift Assembly
Supplemental Restraint System (SRS) Module Under Left Front Seat
Transmission Range (TR) Switch Part Of PNP Switch
Vehicle Control Module (VCM) (3) In Engine Compartment, Near EBCM
Vehicle Speed Sensor (VSS) In Extension Housing, On Left Side Of Transmission
VSS Adapter (4WD) On Left Side Of Transmission
(1) C100 connector is a Black 16-pin connector.
(2) Information on C152 connector color and number of pins is not available from manufacturer.
(3) VCM connector may also be referred to as Powertrain Control Module (PCM). VCM connector C1 is Blue, C2 is Red, C3 is Clear and C4 is Black.
Fig 1: Identifying Engine Oil Pressure Sensor (OPS) Connector Terminals
G00016235Courtesy of GENERAL MOTORS CORP.
Fig 2: Identifying EVO/Passlock™ Module Connector Terminals
G98E00764Courtesy of GENERAL MOTORS CORP.
Fig 3: Identifying Instrument Cluster Connector Terminals
G99G08344Courtesy of GENERAL MOTORS CORP.
Fig 4: Identifying Vehicle Control Module (VCM) Connector Terminals (4.3L)
G98H00866Courtesy of GENERAL MOTORS CORP.
Fig 5: Identifying Vehicle Control Module (VCM) Connector Terminals (4.8L, 5.3L & 6.0L)
G97E28443Courtesy of GENERAL MOTORS CORP.