Hummer H2. Manual - part 1205

2. Install the ground strap nut to the stud at the front of dash. 

Tighten: Tighten the nut to 9 N.m (80 lb in). 

3. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information. 

Fig. 38: Ground Cable Bolt At Engine Block 
Courtesy of GENERAL MOTORS CORP. 

4. Position the ground strap and engine wiring harness ground.  

5. Install the engine wiring harness ground bolt. 

 

2004 Hummer H2 

2004 ELECTRICAL Engine Electrical - Hummer H2

  

Tighten: Tighten the bolt to 16 N.m (12 lb ft).

6. Install the left hand catalytic convert. Refer to Catalytic Converter Replacement (Right Hand) in 

Engine Exhaust.  

7. Lower the vehicle.  

STARTER MOTOR RELAY REPLACEMENT 

Removal Procedure 

Fig. 39: Starter Motor Relay 

 

2004 Hummer H2 

2004 ELECTRICAL Engine Electrical - Hummer H2

  

Courtesy of GENERAL MOTORS CORP.

1. Remove the underhood bussed electrical center (UBEC) cover.  

2. Remove the starter motor relay. Refer to Relay Replacement (Within an Electrical Center) or Relay 

Replacement (Attached to Wire Harness) in Wiring Systems.  

Installation Procedure 

Fig. 40: Starter Motor Relay 
Courtesy of GENERAL MOTORS CORP.

 

2004 Hummer H2 

2004 ELECTRICAL Engine Electrical - Hummer H2

  

1. Install the starter motor relay. Refer to Relay Replacement (Within an Electrical Center) or Relay 

Replacement (Attached to Wire Harness) in Wiring Systems.  

2. Install the underhood bussed electrical center (UBEC) cover.  

STARTER MOTOR REPLACEMENT 

Removal Procedure 

CAUTION: Refer to Battery Disconnect Caution in Cautions and Notices.

 

2004 Hummer H2 

2004 ELECTRICAL Engine Electrical - Hummer H2