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