There is a Cummins location in Montgomery AL. We have used it before for a generator problem. The technician was very knowledgeable, the work was done quickly and reasonably priced. They had to replace our fuel lines to the generator. Call them ahead to make an appointment. We stayed at Gunter Hill Campground. If that doesn't work, there is a Cummins in Nashville that got good reviews.
Cummins Crosspoint Llc Nashville 3615
706 Spence Lane
Nashville, Tennessee 37217
United States
Phone: 800 546-3690
There is a Cummins Coach Care in Birmingham AL but it didn't get good reviews on www.rvservicereviews.com