Hummer H2. Manual - part 2089

Replacement - Rear No. 2 or Seat Cushion Frame Replacement - Rear in Seats. 

Emergency Locking Retractors 

1. Fasten the seat belts, an assistant is needed when the retractor under test is not part of the driver seat belt. 

2. Accelerate the vehicle slowly to 16 km/h (10 mph) and apply the brakes firmly.  

3. Verify that the seat belt locks when braking firmly.  

4. If the belt does not lock, proceed with the following steps. 

1. Remove the seat belt retractor assembly.  

2. Tilt the seat belt retractor slowly. 

Fig. 3: Tilting Seat Belt Retractor 
Courtesy of GENERAL MOTORS CORP. 

3. Ensure that the seat belt webbing can be pulled from the retractor at an inclination of 15 degrees or 

less and cannot be pulled from the retractor at an inclination of 45 degrees or more. 

CAUTION: Perform this test in an area clear of other vehicles or obstructions. Do not 

conduct this test on the open road. A large, empty parking lot is suitable. 
Failure to observe this precaution may result in damage to the vehicle and 
possible personal injury.

 

2004 Hummer H2 

2004 RESTRAINTS Seat Belts - Hummer H2

  

4. If the seat belt retractor does not operate as described, replace the retractor assembly. Refer to the 

following procedures: 

z

Seat Belt Retractor Replacement - Left Front  

z

Seat Belt Retractor Replacement - Right Front .  

z

Seat Belt Retractor Replacement - No. 1 Rear  

SYMPTOMS - SEAT BELTS 

Visual/Physical Inspection 

z

Inspect for aftermarket devices which could affect the operation of the Seat Belt System. Refer to 
Checking Aftermarket Accessories in Wiring Systems.  

z

Inspect the easily accessible or visible system components for obvious damage or conditions which could 
cause the symptom.  

Intermittent 

Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for 
Intermittent Conditions and Poor Connections in Wiring Systems. 

Symptom List 

Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom: 

z

Fasten Safety Belt Indicator/Chime Always On  

z

Fasten Safety Belt Indicator/Chime Inoperative  

FASTEN SAFETY BELT INDICATOR/CHIME ALWAYS ON 

Fasten Safety Belt Indicator/Chime Always On 

IMPORTANT: Review the Seat Belt System Description and Operation in order to familiarize 

yourself with the system functions. Refer to Seat Belt System Description and 
Operation .

Step

Action

Yes

No

Schematic Reference:Seat Belt Schematics 
Connector End View Reference:Seat Belt Connector End Views

1

Did you review the Diagnostic Starting Point - Seat Belts?

Go to 

Step 2

Go to Diagnostic Starting 

Point - Seat Belts

2

Did you perform the Diagnostic System Check - Instrument 
Cluster?

Go to 

Step 3

Go to Diagnostic System 

Check - Instrument 

Cluster

1. Install a scan tool.  

2. Turn ON the ignition, with the engine OFF.  

 

2004 Hummer H2 

2004 RESTRAINTS Seat Belts - Hummer H2

  

FASTEN SAFETY BELT INDICATOR/CHIME INOPERATIVE 

Fasten Safety Belt Indicator/Chime Inoperative 

3

3. Fasten the LF seat belt.  

4. With a scan tool, observe the seat belt buckled 

parameter in the instrument panel cluster (IPC) data 
list.  

Does the scan tool indicate that the seat belt is buckled?

Go to 

Step 8

Go to Step 4

4

1. Disconnect the LF seat belt switch connector.  

2. With a scan tool, observe the seat belt buckled 

parameter in the instrument panel cluster (IPC) data 
list.  

Does the seat belt parameter change state?

Go to 

Step 5

Go to Step 6

5

Replace the LF seat belt switch. Refer to Seat Belt Buckle 
Replacement - Front . 
Did you complete the replacement?

Go to 

Step 9

-

6

Test the signal circuit of the seat belt switch for a short to 
ground. Refer to Circuit Testing and Wiring Repairs in 
Wiring Systems. 
Did you find and correct the condition?

Go to 

Step 9

Go to Step 7

7

Replace the inflatable restraint sensing and diagnostic module 
(SDM). Refer to Inflatable Restraint Sensing and 
Diagnostic Module Replacement 
Did you complete the replacement?

Go to 

Step 9

-

8

Replace the IPC. Refer to Instrument Panel Cluster (IPC) 
Replacement in Instrument Panel, Gauges and Console. 
Did you complete the replacement?

Go to 

Step 9

-

9

Operate the system in order to verify the repair. 
Did you correct the condition?

System 

OK

Go to Step 2

Step

Action

Yes

No

Schematic Reference:Seat Belt Schematics 
Connector End View Reference:Seat Belt Connector End Views

1

Did you review the Diagnostic Starting Point - Seat 
Belts?

Go to Step 2

Go to Diagnostic 

Starting Point - Seat 

Belts

2

Did you perform the Diagnostic System Check - 
Instrument Cluster ?

Go to Step 3

Go to Diagnostic 

System Check - 

Instrument Cluster

1. Turn ON the ignition, with the engine OFF.  

2. Observe the seat belt indicator illumination during 

 

2004 Hummer H2 

2004 RESTRAINTS Seat Belts - Hummer H2

  

SEAT BELT SERVICE PRECAUTIONS 

3

bulb check.  

Does the seat belt indicator illuminate during bulb 
check?

Go to 

Symptoms - 

Seat Belts

Go to Step 4

4

1. Install a scan tool.  

2. Unfasten the LF seat belt.  

3. With a scan tool, observe the seat belt buckled 

parameter in the instrument panel cluster (IPC) 
data list.  

Does the scan tool indicate that the seat belt is 
unbuckled?

Go to Step 5

Go to Step 6

5

Replace the IPC. Refer to Instrument Panel Cluster 
(IPC) Replacement in Instrument Panel, Gauges and 
Console. 
Did you complete the replacement?

Go to Step 11

-

6

1. Disconnect the LF seat belt switch connector.  

2. With a scan tool, observe the seat belt buckled 

parameter in the instrument panel cluster (IPC) 
data list.  

Does the seat belt parameter change state?

Go to Step 7

Go to Step 8

7

Replace the LF seat belt switch. Refer to Seat Belt 
Buckle Replacement - Front . 
Did you complete the replacement?

Go to Step 11

-

8

Test the signal circuit of the seat belt switch for an open 
or high resistance. Refer to Circuit Testing and Wiring 
Repairs in Wiring Systems. 
Did you find and correct the condition?

Go to Step 11

Go to Step 9

9

Test the ground circuit of the seat belt switch for an 
open or high resistance. Refer to Circuit Testing and 
Wiring Repairs in Wiring Systems. 
Did you find and correct the condition?

Go to Step 11

Go to Step 10

10

Replace the inflatable restraint sensing and diagnostic 
module (SDM). Refer to Inflatable Restraint Sensing 
and Diagnostic Module Replacement 
Did you complete the replacement?

Go to Step 11

-

11

Operate the system in order to verify the repair. 
Did you correct the condition?

System OK

Go to Step 2

IMPORTANT: If the vehicle has been in a collision, refer to Repairs and Inspections 

Required After a Collision for additional information.

 

2004 Hummer H2 

2004 RESTRAINTS Seat Belts - Hummer H2