Having trouble with the MyChevrolet or myGMC app not connecting to your T1XX? Here are the most common causes and fixes.
Symptoms:
- App shows “Unable to Connect” or “Vehicle Offline”
- Remote start fails to activate
- App shows outdated vehicle information
- Lock/unlock not responding
Common Causes and Fixes:
1. OnStar Module Connection Lost
The most common cause. The OnStar module in the truck may have lost its cellular connection.
Fix: Press the OnStar button (mirror-mounted) and speak to an advisor – they can diagnose the module status and push a reset.
2. App Needs Update
An outdated app version can cause connectivity issues.
Fix: Update the app from the App Store or Google Play.
3. Phone Bluetooth Interference
Active Bluetooth connections can interfere with app communication.
Fix: Disable Bluetooth on the phone temporarily and try the app on cellular data.
4. Account Issues
Expired subscription or billing issue breaks remote features.
Fix: Check account status at mychevrolet.com or myGMC.com.
5. Battery Voltage
If truck battery is low (under 12.4V), the OnStar module may not respond.
AstroAI Multimeter – Check battery voltage to confirm the truck has sufficient power.
Force Reconnect:
- Press blue OnStar button to verify cellular connection
- Log out of app and log back in
- Remove and re-add the vehicle to your account
Last Resort: Dealer Visit
If none of the above work, the OnStar module may need to be reset or replaced by the dealer.
Has the MyChevrolet app caused you issues? What fixed it?