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Component Locations

WARNING: This page is about a different car, the 1999 GMC Sierra and 1999 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
COMPONENT LOCATIONS

Component Location
Automatic Transfer Case (ATC) Control Module Behind Headlight Switch. See Fig 1 .
Body Control Module (BCM) On Lower Left Side Of Instrument Panel, Below Steering Column. See Fig 2 .
Body Wiring Harness Junction Block Below Left Side Of Instrument Panel, Near Left Kick Panel
Brake Fluid Level Switch On Left Side Of Brake Fluid Reservoir
C100 Connector (1) Below Engine Wiring Harness Junction Block. See Fig 3 .
C152 Connector (2) Below Engine Wiring Harness Junction Block. See Fig 3 .
Electronic Brake Control Module (EBCM) In Engine Compartment, On Left Inner Frame Rail. See Fig 4 .
Engine Coolant Level Switch In Coolant Reservoir
Engine Coolant Temperature (ECT) Sensor On Left Side Of Engine, Near No. 1 Spark Plug. See Fig 5 .
Engine Oil Level Switch On Right Side Of Oil Pan
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. See Fig 6 .
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 (Left Bussed Electrical Center) On Lower Left Side Of Instrument Panel. See Fig 7 .
Ignition Relay In Underhood Bussed Electrical Center. See Fig 10 .
Linear Shift Assembly Mounted On Steering Column Support Assembly
MID Bussed Electrical Center Under the left side of the instrument panel near left kick panel. See Figure .
Park Brake Switch Mounted On Parking Brake Assembly
Park/Neutral Position (PNP) Switch On Left Side Of Transmission. See Fig 8 .
Powertrain Control Module (PCM) In Engine Compartment, Near EBCM. See Fig 11 .
Seat Belt Switch In Seat Belt Buckle
Supplemental Restraint System (SRS) Module Under Left Front Seat
Transmission Range (TR) Switch Part Of PNP Switch. See Fig 8 .
Underhood Bussed Electrical Center On Left Fenderwell. See Fig 9 .
Vehicle Control Module (VCM) (3) In Engine Compartment, Near EBCM. See Fig 11 .
Vehicle Speed Sensor (VSS) In Extension Housing, On Left Side Of Transmission. See Fig 12 .
VSS Adapter (4WD) On Left Side Of Transfer Case
Windshield Washer Fluid Level Switch In Washer Fluid Reservoir
(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 C1 is Blue, C2 is Red, C3 is Clear and C4 is Black.
Fig 1: Locating Automatic Transfer Case (ATC) Control Module
G00214588Courtesy of GENERAL MOTORS CORP.
Fig 2: Locating Body Control Module (BCM)
G00214589Courtesy of GENERAL MOTORS CORP.
Fig 3: Locating C100 & C152
G00214590Courtesy of GENERAL MOTORS CORP.
Fig 4: Locating Electronic Brake Control Module
G00214591Courtesy of GENERAL MOTORS CORP.
Fig 5: Locating Engine Coolant Temperature (ECT) Sensor
G00214592Courtesy of GENERAL MOTORS CORP.
Fig 6: Locating Engine Oil Temperature Sensor
G00150464
Fig 7: Locating Fuse Block (Left Bussed Electrical Center)
G00100789Courtesy of GENERAL MOTORS CORP.
Fig 8: Locating Park/Neutral Position (PNP) Switch
G00214593Courtesy of GENERAL MOTORS CORP.
Fig 9: Locating Underhood Bussed Electrical Center
G00100795Courtesy of GENERAL MOTORS CORP.
Fig 10: Identifying Underhood Bussed Electrical Center Components
G00100796Courtesy of GENERAL MOTORS CORP.
Fig 11: Locating Powertrain Control Module (PCM) & Vehicle Control Module (VCM)
G98G63368
Fig 12: Locating Vehicle Speed Sensor
G00214594Courtesy of GENERAL MOTORS CORP.