Welcome to iRV2. The numbers sound like the model of coach. However, your best chance at a fast and correct answer is to post this question in the Thor Owner's Forum. This includes Damon coaches. On the iRV2 main page scroll down about 1/2 way. Look for the Thor Owners Forum. I suggest this because nobody knows your coach like someone who owns one just like yours.
2005 Newmar KSDP 3910 + GMC ENVOY XUV 37K lbs Moving Down The Road
The Avatar Is Many Times Around The USA
Nobody Knows Your Coach Like Somebody Who Owns One Just Like Yours