This is usually due to the GPS signal being weak and needing to have a stronger lock. Please try the following steps:

1. Drive around to sync the satellites with your unit. This could take up to 24 hours.

2. Unplug, then plug your GPS antenna connector – push hard to verify a good connection. Do not severely bend the cable since you might break the internal wire.

3. Re-position the antenna for better signal reception – verify no metal object is above the antenna. Window tint can also affect satellite reception. You could temporarily place the antenna outside of the vehicle just to illuminate any obstructions.

4. Change your region: select “DEST”, then touch the map (right side of the screen). Now select your region.

5. Eject the Map Disc and reinstall it.

If you're still having issues, please feel free to to contact the support department for additional assistance.

First, please check your unit's balance/fade settings (left & right, front & rear)

If you have a Bose amplifier in the vehicle, make sure you have a GM tech program the unit to properly match the amplifier.

If you're having any of the issues below, you may need to install the VSS kit (brown connector) which should have been included in your kit along with a set of pictured instructions.

Not all vehicles require a VSS kit. The VSS Kit was developed to solve two potential problems that might occur after installation. 1. GPS Tracking: •The navigation display doesn’t accurately follow me down the highway. •My current location vs. what’s being displayed on the navigation screen seems to be different. 2. Voice Commands: •After I input a destination and while I’m driving to that destination – the navigation system only gives me two voice commands saying “Proceed to the highlighted route” and “You’ve reached your destination”.

The navigation unit will need a hard reset.

Remove the positive and negative battery cables from your battery, touch them together, and then reconnect them to the battery.

This will resolve several potential issues with the navigation system.

If this does not fix the issue, there may be a possible hardware/software related issue that may need to be addressed. Please reach out to support for further assistance.

If your navigation does not accurately follow you, (a street or two off/not aligned properly) please follow these tips:

•Check the VSS plug which is the brown plug with the green wire.

This may not be getting a good connection.

•Check that the GPS antenna is not covered by any metal.

You can put the antenna on the dash temporarily and drive around a little to prompt the unit to update to your location, then relocate it just below the dash.

If the navigation system only gives you two voice commands saying “Proceed to the highlighted route” and “You’ve reached your destination”. Please follow the documentation below.

For installations that received only the brown plug with a green wire:

Check the VSS plug to make sure the green wire is getting a good connection.

If it is and you still do not receive the prompts, check the settings to makes sure the voice prompts option is turned on and the volume is turned up.

For installations that received the brown plug with a green wire and a purple and brown or purple and grey wire:

Please follow procedure 2 in the installation guide: