Rollin’ Coal Customs is an experienced, trustworthy company specializing in both customizing and repairing light duty diesel trucks in the Romeo, MI area. Custom is in our name, and it’s what we do best. Rollin’ Coal Customs is an experienced, trustworthy company specializing in both customizing and repairing light duty diesel trucks in the Romeo, MI area. Custom is in our name, and it’s what we do best.