GMC Straight Flat Truck. 2006 GMC with 324’156 miles. It has a Duramax/Isuzu 7.8 liter, 475 CID, 300 horse power diesel engine. The transmission is a Eaton Fuller 8 speed + Lo & Lo-Lo. The GMC truck also has AC, decent front tires with like new rear tires. It’s a very clean fleet maintained great running truck.