Hi USMC0311,
Welcome to the Heartland Owners Forum.
If your unit is affected by the LED recall, you should have received a letter from Heartland.
Regardless, here's the VIN # range from safercar.gov.
VIN Range 1 : Begin : 5SFNB3024GE308222 End : 5SFNB2829HE330684 (not sequential)
If you're still not sure, call Heartland Customer Service at 877-262-8032 / 574-262-8030. Have your VIN # ready.