New member to the forum and first time diesel owner. Just purchased an 08 Sierra 2500 HD. The truck has 116k miles and a leveling kit. Otherwise it’s completely stock. The milage is low for the year and the truck is in fantastic condition both inside and out. Hope to get many years of great service. Is there anything I should watch for in a used LMM? Common problems that I can fix if caught early? I’m a fairly decent shade tree mechanic for gas engines and I’m confident I can make it through the learning curve of switching from a Vortec to a Duramax. Any advice or pointers would be greatly appreciated.