GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2003 🢒 GMC C Sierra - 2WD 🢒 Engine 🢒 Engine Electrical 🢒 Engine Electrical Component Views
Figure 1:

RH Front of 4.3L Engine
Object Number: 403977 Size: MF
(1)Ground 102 (G102)
(2)Crankshaft Position (CKP) Sensor
(3)Negative Battery Cable
(4)Engine Oil Level Switch
(5)Engine Harness
(6)Positive Battery Cable
Figure 2:

LH Side of Engine 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 102 (G102)
(5)Negative Battery Cable
(6)Engine Coolant Temperature (ECT) Sensor Connector
Figure 3:

Auxiliary Battery Relay
Object Number: 349894 Size: MF
(1)Auxiliary Battery Relay
(2)A/C Accumulator
(3)A/C Low Pressure 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 Connector
Figure 4:

Generator
Object Number: 349757 Size: MF
(1)Generator
(2)Battery
(3)Battery Cable Bracket
Figure 5:

Dual Generators
Object Number: 741105 Size: MF
(1)Generator - Primary
(2)Engine - 6.6L
(3)Generator - Auxiliary
Figure 6:

Auxiliary Battery
Object Number: 349908 Size: MF
(1) Battery - Right Positive Cable Fuse Housing
(2)Dash Panel
(3) Battery - Right Relay (TP2)
(4) Battery - Right Positive Cable Connection Shield
(5) Battery - Right Positive Cable
(6)Battery Tray
(7)Battery