Navigation System - Vehicle Position Indicator Inoperative or Erratic

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2004 Oldsmobile Bravada, 2004 GMC Envoy XUV, 2004 GMC Envoy XL, 2004 GMC Envoy, and 2004 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.

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	Start the vehicle and press the NAV button to switch to the navigation screen. Drive the vehicle for longer than 15 seconds with the speed above 15mph. Monitor the vehicle position indicator. Does the vehicle position indicator operate normally?	Go to Testing for 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