STARTING/CHARGING

(near left side of eng) battery cable junction block
(not used)
(on left front of engine compartment)
Auxiliary battery relay (right rear of eng compt)
B12
Battery
Charge indicator control
Computer data lines
Fuse holder
Fusible link
G100 (lower left radiator support)
G102 (4.3l: lower right front of engine block, exc 4.3l: left side of engine block)
G106 (on right front of eng block)
G203 (near left "a" pillar)
Generator
Generator field duty cycle signal
Ground
Hot in run & start
I/p relay block (near left kick panel)
Ign 1 volt
Ign e fuse 10a
Instrument panel cluster
Ipc class 2 serial data
Left battery
Logic
Pnk
Power distribution system
Powertrain control module (pcm)
Right battery
Right battery (w/aux battery)
Seo ign fuse 10a
Serial data class 2
Sp205 (in i/p harn)
Starter
Underhood fuse block (at left side of eng compt)
Volts
W/ seo
W/aux battery
W/dual batteries
W/o seo
Wrecker option

(pin 15-20 not used)
(pin 3-6 not used)
A/c system
Apo neutral
Apo phase a
Apo switch ind ctrl
Apo switch sig
Aux heater pump rly ctrl
Battery +
Battery fuse 175a
Class 2 serial data
Computer data lines system
Coolant pump rly ctrl
Cooling fans system
Crank voltage
Electric machine
Eng spd sig
Engine speed signal
Escm fuse 20a
Fuse holder
G100 (on lower left of radiator core support)
G102 (4.3l: lower right front of eng block, exc 4.3l: left side of engine block)
G103
G311 (in energy storage box)
Ground
Hch-b fuse 10a
Hcm-i fuse 10a
Hi spd gmlan srl data +
Hi spd gmlan srl data -
Hi volt interlock loop sig 2
Hi voltage battery +
High speed gmlan serial (+)
High speed gmlan serial (-)
Hood ajar sw sig
Hood ajar switch
Hot at all times
Hot in run and start
Hybrid control module
Ignition 0 voltage
Ignition 1 voltage
Instrument cluster system
Left battery
Low ref
Medium resolu- tion engine speed signal
Medium resolution eng spd
Nca
Phase 1
Phase 2
Phase 3
Pnk
Pnp start switch signal
Power distribution system
Powertrain control module (pcm) (on left front of engine compartment)
Pwr maint rly coil ctrl
Red
S103
S116
S130
S180
Starter enable rly ctrl
Starter/generator control module (right rear of eng compt)
Stator
Tan
Trans pump rly ctrl
Transmissions system
Underhood secondary fuse block (left side of eng compt, rear of battery)

(diesel)
(gasoline)
A/t
Acc
C1 a11
C1 a3
C1 a9
C1 b12
C2 a7
C2 d11
C2 f3
C2 f9
Clutch start switch (m/t) (on top of clutch pedal assembly)
Clutch start switch sign
Crank fuse 10a
Crank sign
D12
F11
G100 (on lower left of radiator core support)
G102 (4.3l: lower right front of eng block, exc 4.3l: left side of engine block)
Gasoline only
Ign a fuse 40a
Ign b fuse 40a
Ign e fuse 10a
Ignition switch
Left battery
Lock
M/t
Off
Park/neutral position switch (a/t) (on left side of transmission)
Pnk
Power distribution system
Powertrain control module (pcm) (gasoline) engine control module (diesel) (on left front of engine compartment)
Red
Run
Run off
Start
Starter enable relay ctrl
Starter motor
Starter relay
Starter solenoid
Underhood fuse block (at left side of eng compt)
Underhood fuse block (left side of eng compt)
Underhood junction block (at left side of eng compt)

STARTING/CHARGING – Chevrolet Silverado 1500 HD 2005 – SYSTEM WIRING DIAGRAMS