GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 1999 🢒 Chevy C Silverado - 2WD 🢒 Restraints 🢒 SIR 🢒 Power and Grounding Component Views
Figure 1:

Lower LF of the Radiator Support Components
Object Number: 310809 Size: MF
(1)LH Lower Radiator Support
(2)Forward Lamp Harness
(3)Negative Battery Cable (G100)
(4)Frame
(5)Ground 100 (G100)
Figure 2:

Front Drive Axle Harness Routing (K15 Series)
Object Number: 310214 Size: LF
(1)Vent Tube
(2)Vent Tube Connection
(3)Front Axle Actuator/Switch
(4)Front Axle Actuator/Switch Connector
(5)Front Drive Axle Assembly (Mount)
(6)Ground 110 (G110)
(7)Left Inner Fender
Figure 3:

Front Drive Axle Harness Routing (K25 Series)
Object Number: 310212 Size: LF
(1)Ground 110 (G110)
(2)Vent Tube
(3)Vent Tube Connection
(4)Front Axle Actuator/Switch
(5)Front Axle Actuator/Switch Connector
(6)Left Inner Fender
Figure 4:

Lower LR of the Engine Components (4.8L/5.3L/6.0L)
Object Number: 310261 Size: LF
(1)Ground 103 (G103)
(1)Ground 103 (G103)
(2)Engine Harness- H02S
(3)HO2 Sensor connector- Bank 1, Sensor 1
(4)Fuel Line Bracket
(5)Ground 104 (G104)
(5)Ground 104 (G104)
(6)Oil Pressure Sensor Connector
(6)Oil Pressure Sensor
(7)Engine Ground Strap (G107)
(8)TP 1 Battery Cable (G106)
Figure 5:

Lower Left Side of the Engine Components (4.8L/5.3L/6.0L)
Object Number: 403980 Size: MF
(1)Engine Harness
(2)Battery Cable Junction Block Bracket
(3)LH Rocker Cover
(4)Ground 105 (G105)
(5)Negative Battery Cable
(6)Engine Coolant Temperature (ECT) Sensor Connector
Figure 6:

Lower LR of the Engine Components (4.8L/5.3L/6.0L)
Object Number: 310261 Size: LF
(1)Ground 103 (G103)
(1)Ground 103 (G103)
(2)Engine Harness- H02S
(3)HO2 Sensor connector- Bank 1, Sensor 1
(4)Fuel Line Bracket
(5)Ground 104 (G104)
(5)Ground 104 (G104)
(6)Oil Pressure Sensor Connector
(6)Oil Pressure Sensor
(7)Engine Ground Strap (G107)
(8)TP 1 Battery Cable (G106)
Figure 7:

Left Rear Underhood-Front of Dash
Object Number: 310036 Size: MF
(1)Windshield Wiper Motor Module Electrical Connector
(2)Cruise Control Module (CCM) Connector
(3)Plenum Panel
(4)Cruise Control Module
(5)P100
(6)Dash Panel
(7)Cap For Connector, Without Cruise Control
(8)Cruise Control Module (CCM) Connector
(9)Harness Pass Through
(10)Windshield Wiper Motor Module
Figure 8:

Lower RF of the Engine Components (4.3L)
Object Number: 403977 Size: MF
(1)Ground 105 (G105)
(2)Crankshaft Position (CKP) Sensor
(3)Negative Battery Cable
(4)Engine Oil Level Switch
(5)Engine Harness
(6)Positive Battery Cable
Figure 9:

Right Side of the Engine Components (4.3L)
Object Number: 310504 Size: LF
(1)Coil - Ignition
(2)Generator
(3)Ignition Coil Driver
(4)Generator Connector
(5)RH Cylinder Head
(6)Ground 103 (G103)
(7)Map Sensor Connector
(8)Map Sensor
Figure 10:

LH Rear View of Engine-4.3L
Object Number: 310499 Size: MF
(1)Oil Pressure Sensor Connector
(2)Oil Pressure Sensor
(3)Ground 104 (G104)
(4)Engine Ground Strap (G107)
(5)Engine 4.3L
(6)Knock Sensor
(7)Knock Sensor Connector
(8)Distributor Connector
(9)Distributor
Figure 11:

RH Upper Instrument Panel
Object Number: 403970 Size: MF
(1)Instrument Panel
(2)Ground 200 (G200)
(3)Ground Stud
Figure 12:

HVAC Module Assembly (Connections)
Object Number: 310004 Size: MF
(1)Recirculation Door Motor Electrical Connector
(2)Instrument Panel
(3)Electrical Harness Connector
(4)Ground 200 (G200)
(5)Blower Motor Resistor/Relay Assembly
(6)Blower Motor Resistor/Relay Electrical Connector
(7)Harness Inline Connector (C296)
(8)Temperature Door Motor Electrical Connector
(9)Temperature Door Motor
(10)Mode Door Motor
Figure 13:

Upper Left of the I/P Components
Object Number: 310066 Size: MF
(1)Splice Pack 203 (SP203)
(2)Ground 203 (G203)
(3)Dash
(4) A-Pillar
Figure 14:

Left Side Frame Rail -- Brake Components
Object Number: 309937 Size: MF
(1)Ground 302 (G302)
(2)LH Body Mount
(3)Ground Screw
(4)Electronic Brake Control Module (EBCM)
(5)Fuel Tank
Figure 15:

Below Driver Seat Components (Driver Power Only)
Object Number: 309996 Size: MF
(1)Driver Power Seat Harness
(2)Driver Power Seat Connector
(3)Driver Power Seat Ground 304 (G304)
(4)Driver Power Seat Inline Connector
(5)Harness to IP Electrical Connector
(6)Harness to IP
Figure 16:

Below Front Seats Components (Both w/Power)
Object Number: 309991 Size: MF
(1)Driver Power Seat Electrical Connector
(2)Passenger Power Seat Wiring Harness
(3)Passenger Power Seat Electrical Connector
(4)Inline Wiring Connector (IP)
(5)Power Seat Wiring Harness Connector
(6)Ground 304 (G304)
Figure 17:

RR of the Cab Components (Regular Cab Pickup)
Object Number: 309985 Size: MF
(1)Right Rear Speaker Electrical Connection
(2)Rear Glass
(3)Rear Window Defogger Grid Electrical Connection
(4)Rear Window Defogger Grid Electrical Connector
(5)Rear Inner Body Panel
(6)Right Rear Speaker and Rear Window Defogger Grid Electrical Harness
(7)Ground 306 (G306)
(8)Side (RH) Inner Body Panel
(9)Access Hole (Panel)
(10)Right Rear Speaker Electrical Harness Connection
Figure 18:

Fuel Tank and Sensor (Typical)
Object Number: 309947 Size: MF
(1)Fuel Sender
(2)Ground 403 (G403)
(3)Fuel Filler Ground 302 (G-403)
(4)LH Frame
(5)Fuel Sender (Typical)
Figure 19:

LR of the Cab Components (Regular Cab Pickup)
Object Number: 309987 Size: MF
(1)Left Rear Speaker Electrical Connection
(2)Left Rear Speaker Electrical Harness Connection
(3)Access Hole (Panel)
(4)Left Rear Speaker and Rear Window Defogger Grid Electrical Harness
(5)Left Rear Speaker and Rear Window Defogger Grid Electrical Harness
(6)Rear Inner Body Panel
(7)Rear Window Defogger Grid Electrical Connector
(8)Rear Window Defogger Grid Electrical Connection
(9)Rear Glass
Figure 20:

Lower Center of the I/P Components
Object Number: 310152 Size: MF
(1)Ashtray Lamp Socket
(2)Bulb
(3)Ashtray Lamp Shield
(4)Instrument Panel
(5)Accessory Power Outlet
(6)Cigar Lighter Assembly
Figure 21:

Right Bussed Electrical Center (RBEC)
Object Number: 310167 Size: LF
(1)Right Bussed Electrical Center (RBEC)
(2)Instrument Panel (IP)
Figure 22:

Auxiliary Battery Relay
Object Number: 349894 Size: MF
(1)Auxiliary Battery Relay
(2)A/C Accumulator
(3)A/C Compressor Low Pressure Cycling Switch
(4)Inner Wheel Well
(5)Engine Coolant Level Switch Electrical Connector
(6)Mass Air Flow (MAF) Sensor
(7)Air Cleaner Assembly
(8)Engine Coolant Recovery Reservoir
(9)Auxiliary Battery Relay Electrical Connector
Figure 23:

Trailer Receptacle
Object Number: 349942 Size: MF
(1)Platform Assembly Trailer Weight Distribution Hitch
(1)Platform Assembly Trailer Weight Distribution Hitch
(2)Trailer Wiring Receptacle
(3)Trailer Wiring Receptacle Bracket
(3)Trailer Wiring Receptacle Bracket
Figure 24:

Trailer Wiring Harness
Object Number: 349960 Size: MF
(1)Trailer Wiring Connector
(2)Trailer Wiring Receptacle
(3)Frame
(4)Trailer Hitch Receiver
Figure 25:

Underhood Bussed Electrical Center (UBEC) Cover
Object Number: 349807 Size: MF
(1)Underhood Bussed Electrical Center (UBEC) Cover
(2)Underhood Bussed Electrical Center (UBEC) Bracket
(3)Underhood Bussed Electrical Center (UBEC)
(4)Wheel House
(5)Inner Fender
Figure 26:

Rear Frame -- Rear Lamp Components
Object Number: 309877 Size: MF
(1)Rear Lamp Bussing Block Bracket
(2)Rear Lamp Bussing Block
(3)Rear Cross Sill
(4)Rear Lamps Bussing Block Electrical Connector
Figure 27:

LR Frame -- Camper Provision
Object Number: 309959 Size: MF
(1)Camper Wiring Harness
(2)Frame
(3)Camper Wiring Harness Connector
Figure 28:

Underhood Bussed Electrical Center (UBEC)
Object Number: 310806 Size: MF
(1)Underhood Bussed Electrical Center Bracket
(2)Inflatable Restraint Harness
(3)Radiator Support
(4)Inflatable Restraint Electrical Connector (IP) (C101)
(5)Inflatable Restraint Electrical Connector (Sensor) (C101)
(6)LH Battery Tray
(7)Underhood Bussed Electrical Center (UBEC) Bracket
(8)Underhood Bussed Electrical Center (UBEC)
Figure 29:

Underhood Bussed Electrical Center (UBEC) Connectors to UBEC
Object Number: 310798 Size: MF
(1)Underhood Bussed Electrical Center (UBEC)
(2)C-4 (GRN)
(3)C-3 (RED)
(4)UBEC Bracket
(5)LH Inner Fender (Shield)
(6)LH Inner Fender
(7)C-1 (LT GRY)
(8)C-2 (BLK)
Figure 30:

Underhood Bussed Electrical Center-C3 (RED) and C8 (LT GRY)
Object Number: 404499 Size: MF
(1)C3 (RED)
(2)Underhood Bussed Electrical Center (UBEC)
(3)C8 (LT GRY)
(4)UBEC Bracket
(5)Chassis Harness
Figure 31:

Underhood Bussed Electrical Center-C2 (BLK) and C5 (BLK)
Object Number: 404501 Size: MF
(1)C2 (BLK)
(2)Underhood Bussed Electrical Center (UBEC)
(3)UBEC Bracket
(4)C5 (BLK)
(5)Engine Harness
Figure 32:

Underhood Bussed Electrical Center-C1 (LT GRY) and C6 (BRN)
Object Number: 404504 Size: MF
(1)Underhood Bussed Electrical Center (UBEC)
(2)C7 (BLK) Cavity
(3)UBEC Bracket
(4)C6 (BRN)
(5)Instrument Panel (IP) Harness
(6)C1 (LT GRY)
Figure 33:

Left Hand Lower Dash
Object Number: 310145 Size: MF
(1)Left Bussed Electrical Center (LBEC) Connector
(2)Body Control Module (BCM) Connector
(3)Splice Pack 205 (SP205)
(4)Left Bussed Electrical Center (LBEC)
(5)Data Link Connector (DLC)
(6)LH IP Courtesy Lamp
(7)LH IP Courtesy Lamp Socket
(8)LH IP Support to Dash
(9)Right Windshield Pillar Trim Panel
Figure 34:

Underhood Bussed Electrical Center-C4 and Inlines
Object Number: 404508 Size: MF
(1)C4 (GRN)
(2)Instrument Panel (IP) Inline Connectors
(3)Underhood Bussed Electrical Center (UBEC) Bracket
(4)Connector Tether
(5)IP Harness Inline Connector
(6)C101 (IP Side)
(7)C101 (FWD Lamp Side)
(8)Forward Lamp Inline Connector
(9)UBEC