Hummer H2. Manual - part 1001

C104 (Black, 12 Pin) 

Near underhood fuse block. See Fig. 90 . 

C105 (Black, 1 Pin) 

Near wheelwell. See Fig. 90 . 

C106 (Blue, 12 Pin) 

Below underhood fuse block. See Fig. 90 . 

C115 (Black, 2 Pin) 

At top left rear of engine, in engine harness. See 

Fig. 53 . 

C158 (Ignition Coil Inline) (Light 
Gray, 8 Pin) 

In engine harness to odd ignition coil harness. See 

Fig. 50 . 

C175 (Gray, 20 Pin) 

At right side of automatic transmission. See Fig. 

96 . 

C200 (I/P Harness Side) (Black, 16 
Pin) 

Behind left side of dash. See Fig. 14 . 

C201 (I/P Harness Side) (Yellow, 4 
Pin) 

On left side of dash, behind left kick panel. See 

Fig. 14 . 

C202 (I/P To Steering Column 
Harness) (Black, 52 Pin) 

Attached to transfer case shift control bracket. See 

Fig. 95 . 

C203 (I/P To Steering Column 
Harness) (Yellow, 2 Pin) 

Below steering column. See Fig. 95 . 

C210 (I/P harness side) (Black, 12 
Pin) 

At bottom left side of dash. See Fig. 80 . 

C277 (Black, 8 Pin) 

In top of steering column. 

C298 (I/P To Body Harness) (Light 
Gray, 22 Pin) 

Behind right kick panel. See Fig. 95 . 

C310 (Black, 17 Pin) 

At left side "B" pillar. See Fig. 93 . 

C311 (Black, 3 Pin) 

At base of left roof rail, above driver. 

C320 (Black, 6 Pin) 

Under left rear seat. See Fig. 87 . 

C325 (Black, 16 Pin) 

Under driver's seat. See Fig. 84 . 

C326 (Light Gray, 13 Pin) 

In driver's seat harness, under driver's seat. See 

Fig. 84 . 

C327 (Light Blue, 24 Pin) 

In driver's seat harness, under driver's seat. See 

Fig. 101 . 

C328 (White, 10 Pin) 

In driver's seat harness, under driver's seat. See 

Fig. 84 . 

C329 (Black 6 Pin) 

In driver's seat harness, under driver's seat. See 

Fig. 84 . 

C330 (Gray, 6 Pin) 

In driver's seat harness, under driver's seat. See 

Fig. 84 . 

C333 (Black, 8 Pin) 

In driver's seat harness, under driver's seat. See 

Fig. 60 . 

C350 (Console Harness Side) (Light 
Gray, 22 Pin) 

Under front floor console. See Fig. 102 . 

C350 (I/P Harness Side) (Light Gray, 
22 Pin) 

Under front floor console. See Fig. 102 . 

 

2004 Hummer H2 

2004 GENERAL MOTORS Hummer H2

  

GROUNDS 

GROUNDS LOCATION 

C355 (Black, 8 Pin) 

At front of audio amplifier. See Fig. 93 . 

C375 (Black, 16 Pin) 

Under passenger seat. See Fig. 85 . 

C376 (Black, 6 Pin) 

Under passenger seat. See Fig. 85 . 

C377 (Gray, 6 Pin) 

Under passenger seat. See Fig. 86 . 

C378 (Black, 4 Pin) 

Under passenger seat. See Fig. 86 . 

C380 (Black, 6 Pin) 

Under right rear seat. See Fig. 87 . 

C390 (White, 17 Pin) 

At right side "B" pillar. See Fig. 75 . 

C420 (Medium Gray, 12 Pin) 

At top left area of liftgate. See Fig. 92 . 

C450 (Black, 2 Pin) 

At rear underside of vehicle, attached to air 

suspension assembly. See Fig. 37 . 

C451 (Black, 16 Pin) 

At rear underside of vehicle, attached to air 

suspension assembly. See Fig. 37 . 

C900 (Black, 12 Pin) 

Inside top left body opening of liftgate. See Fig. 

103 . 

Inline C148 (Light Gray, 8 Pin) 

In engine harness to odd ignition coil harness. See 

Fig. 49 . 

Component 

Location 

Fuel Tank Filler Ground 

At left rear frame body mount. See Fig. 23 . 

G100 

At left side of engine compartment. See Fig. 46 . 

G100-Forward Lamp 
Harness 

On left front frame body mount. See Fig. 10 . 

G100-Negative Battery 
Cable 

On left front frame body mount. See Fig. 10 . 

G102-Engine Harness 
Ground 

At left front side of engine block. See Fig. 12 . 

G102-Negative Battery 
Cable 

At left front side of engine block. See Fig. 12 . 

G103 

At top right rear of engine. See Fig. 53 . 

G103-Engine Harness 
Ground 

At top right rear of engine. See Fig. 11 . 

G104 

At top left rear of engine. See Fig. 11 . 

G105-Engine Harness 
Ground 

At lower left side of engine. See Fig. 78 . 

G105-Negative Battery 
Cable 

At lower left side of engine. See Fig. 78 . 

G106 

At right rear of engine compartment, on forward dash panel. 

See Fig. 13 . 

 

2004 Hummer H2 

2004 GENERAL MOTORS Hummer H2

  

SPLICES 

SPLICES LOCATION 

G200 

On left side of dash, near left kick panel. See Fig. 14 . 

G203 

At lower right side of dash, near right kick panel. See Fig. 

15 . 

G300 

On left side body mount, in front of driver door. See Fig. 8 . 

G302 

At left inner center "B" pillar. See Fig. 18 . 

G304 

Under passenger seat. See Fig. 19 . 

G306 

At right inner center "B" pillar. See Fig. 20 . 

G308 

At right frame body mount, near right rear door. See Fig. 21 . 

G310 

At left body mount. See Fig. 22 . 

G401 

At left rear frame body mount. See Fig. 23 . 

G402 

Attached to front of air suspension mounting bracket. See 

Fig. 91 . 

G405 

At right rear frame body mount. See Fig. 24 . 

G410 

On right rear inner side body panel. See Fig. 25 . 

Component 

Location 

SP205 

In I/P harness, on left side of dash, near footwell courtesy lamp. See Fig. 

16 . 

SP206 

In I/P harness, on left side of dash, near steering column in-line connector. 

See Fig. 9 . 

SP207 

In body harness, on left side of dash, near left kick panel. See Fig. 17 . 

SP410 

Inside right rear cargo area, at middle of right rear "D" pillar. See Fig. 25 . 

S100 

In forward lamp harness, 28 cm from junction of left horn harness to 

forward lamp harness. See Fig. 98 . 

S101 

In forward lamp harness, 5 cm from ambient temperature sensor harness. 

See Fig. 99 . 

S102 

In engine harness, 4 cm from knock sensor connector. See Fig. 97 . 

S103 

In engine harness, 10 cm from junction of fuel injector No. 3 harness to 

engine harness. See Fig. 97 . 

S104 

In engine harness, 30 cm from junction of fuel injector No. 3 harness to 

engine harness. See Fig. 97 . 

S140 

In ignition coil harness. 

S141 

In ignition coil harness. 

S142 

In ignition coil harness. 

S160 

In ignition coil harness. 

S161 

In ignition coil harness. 

S162 

In ignition coil harness. 

 

2004 Hummer H2 

2004 GENERAL MOTORS Hummer H2

  

S210 

In I/P harness, 8.5 cm from junction of instrument cluster connector harness 

to I/P harness. See Fig. 94 . 

S211 

In I/P harness, 15 cm from junction of instrument cluster connector harness 

to I/P harness. See Fig. 94 . 

S212 

In I/P harness, 29.5 cm from junction of instrument cluster connector 

harness to I/P harness. See Fig. 94 . 

S213 

In I/P harness, 45.4 cm from junction of instrument cluster connector 

harness to I/P harness. See Fig. 94 . 

S214 

In I/P harness, 50.4 cm from junction of instrument cluster connector 

harness to I/P harness. See Fig. 94 . 

S215 

In I/P harness, 5.5 cm from junction of air temperature sensor. See Fig. 94 . 

S216 

In I/P harness, 2.5 cm from junction of air temperature sensor. See Fig. 94 . 

S217 

In I/P harness, 25.4 cm from headlamp panel dimmer switch. See Fig. 94 . 

S218 

In steering column harness. 

S219 

In steering column harness. 

S290 

In I/P harness, 6.5 cm from junction of I/P compartment lamp to I/P 

harness. See Fig. 94 . 

S300 

In headliner harness, 10 cm from junction of courtesy/reading lamp center 

harness to headliner harness. 

S301 

In headliner harness, at top of left "A" pillar near corner of windshield. See 

Fig. 83 . 

S302 

In headliner harness, near middle of left "A" pillar. See Fig. 83 . 

S303 

In roof-marker harness, 22 cm from right front marker lamp connector. See 

Fig. 64 . 

S304 

In chassis harness, 21.5 cm from G300. See Fig. 8 . 

S305 

In headliner harness, 5 cm from top mounting clip. See Fig. 83 . 

S306 

In left rear seat harness. 

S307 

In body harness, 37.5 cm from C312. See Fig. 92 . 

S310 

In body harness, 8.5 cm from right "B" pillar courtesy lamp harness 

junction to body harness. See Fig. 93 . 

S326 

In driver seat jumper harness, 5 cm from junction of C330 & C328. 

S327 

In driver seat jumper harness, 10 cm from junction of C330 & C328. 

S328 

In driver seat jumper harness, 4.5 cm from memory seat module C3. 

S345 

In roof marker harness, 16.5 cm from junction of right center roof lamp 

connector to roof marker harness. See Fig. 64 . 

S350 

In console harness, 7 cm from junction of body harness in-line C355 to 

floor console harness. See Fig. 89 . 

S351 

In console harness, 28.5 cm from junction of body harness in-line C355 to 

floor console harness. See Fig. 89 . 

S375 

In chassis harness, 63.5 cm from rear differential lock actuator, on chassis 

harness. 

 

2004 Hummer H2 

2004 GENERAL MOTORS Hummer H2