GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2005 🢒 Chevy C Cab/Chassis HD (GMT 400) 🢒 Engine 🢒 Engine Electrical 🢒 Starting and Charging Schematics
Figure 1:

L18 Starting
Object Number: 650801 Size: FS
IGN A Fuse and Ignition Switch
Battery and Underhood Fuse Block
L18 Charging
Master Electrical Component List
Starting System Description and Operation
L18 Charging
L18 Charging
G105, L18, 1 of 2, All Except Ignition Coils
Figure 2:

L18 Charging
Object Number: 650802 Size: FS
Brake, Curise, SEO TP-2, and Htr-Fuses
2004 CK 400 L18 Starting
Gages Fuse and Turn-B/U Fuse
IGN A Fuse and Ignition Switch
Master Electrical Component List
Charging System Description and Operation
2004 CK 400 L18 Starting