Hummer H2. Manual - part 417

NAVIGATION SYSTEM - VEHICLE POSITION INDICATOR INOPERATIVE OR ERRATIC 

Navigation System - Vehicle Position Indicator Inoperative or Erratic 

3

minutes.  

2. Examine the navigation display for the 

GPS icon, indicating that the vehicle 
has GPS reception.  

Does the system have GPS reception?

-

Go to Step 9

Go to Step 4

4

Inspect the front window and front door glass 
for metallic tinting or any other alterations or 
obstructions. 
Is the front window glass OK?

-

Go to Step 6

Go to Step 5

5

Remove the front window or front door glass 
tinting or other alterations. 
Did you complete the repair?

-

Go to Step 9

-

6

Test the GPS antenna line for resistance 
between the center conductor and the outer 
shield. 
Does the resistance measure near the 
specified value?

200ohm

Go to Step 8

Go to Step 7

7

Replace the GPS antenna. Refer to Antenna 
Replacement - Global Positioning System 
(GPS) . 
Did you complete the replacement?

-

Go to Step 9

Go to Step 7

8

Replace the navigation radio. Refer to Radio 
Replacement in Entertainment. 
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 3

Step

Action

Yes

No

Schematic Reference: Navigation System Schematics
DEFINITION: When using the navigation system, the vehicle position indicator does not operate or is 
erratic.

1

Did you perform the Diagnostic System Check - 
Navigation System?

Go to Step 2

Go to Diagnostic 

System Check - 

Navigation System

2

1. Start the vehicle and press the NAV button 

to switch to the navigation screen.  

2. Drive the vehicle for longer than 15 seconds 

with the speed above 15 mph.  

3. Monitor the vehicle position indicator.  

Go to Testing for 

 

2004 Hummer H2 

2004 ACCESSORIES & EQUIPMENT Navigation Systems - Hummer H2

  

REPAIR INSTRUCTIONS 

ANTENNA REPLACEMENT - GLOBAL POSITIONING SYSTEM (GPS) 

Removal Procedure 

Does the vehicle position indicator operate 
normally?

Intermittent Conditions 

and Poor Connections in 

Wiring Systems

Go to Step 3

3

Test the Vehicle Speed Signal circuit for an open.
Did you find and correct the condition?

Go to Step 6

Go to Step 4

4

Inspect for poor connections at the harness 
connector of the navigation radio. Refer to 
Testing for Intermittent Conditions and Poor 
Connections and Connector Repairs in Wiring 
Systems. 
Did you find and correct the condition?

Go to Step 6

Go to Step 5

5

Replace the navigation radio. Refer to Radio 
Replacement in Entertainment. 
Did you complete the replacement?

Go to Step 6

-

6

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

System OK

Go to Step 2

 

2004 Hummer H2 

2004 ACCESSORIES & EQUIPMENT Navigation Systems - Hummer H2

  

Fig. 4: GPS Antenna 
Courtesy of GENERAL MOTORS CORP. 

1. Remove the instrument panel (I/P) top pad. Refer to Trim Pad Replacement - Instrument Panel (I/P) 

Upper in Instrument Panel, Gauges, and Console.  

2. Remove the radio. Refer to Radio Replacement in Entertainment. 

3. Remove the GPS cable from the I/P structure.  

4. Remove the GPS antenna screw (1).  

5. Slide the GPS antenna (2) toward the passenger side of vehicle to remove the antenna from the I/P 

structure.  

6. Remove the GPS antenna (2) from the vehicle. 

IMPORTANT: Observe the routing of the global positioning system (GPS) antenna cable 

to ensure the GPS antenna cable is routed properly during installation.

 

2004 Hummer H2 

2004 ACCESSORIES & EQUIPMENT Navigation Systems - Hummer H2

  

Installation Procedure 

Fig. 5: GPS Antenna 
Courtesy of GENERAL MOTORS CORP. 

1. Install the GPS antenna (2) to the I/P bracket.  

2. Route the GPS antenna cable to the radio opening, as noted in the removal procedure.  

3. Slide the GPS antenna (2) toward the driver side of vehicle and align the screw hole. 

4. Install the screw (1). 

Tighten: Tighten the screw (1) to 2 N.m (18 lb in).

NOTE:

Refer to Fastener Notice in Cautions and Notices.

 

2004 Hummer H2 

2004 ACCESSORIES & EQUIPMENT Navigation Systems - Hummer H2