Paul2500HD
01-01-2006, 20:56
I've had my 2500HD Duramax for 5 months and on my recent fillup, I averaged 12.3 miles per gallon empty. I have also had instances when I pulled out to pass, and the engine backfired. This has happened five or six times. Any ideas or help would be greatly appreciated. I absoutely enjoy all the posts and the information provided on TDP, Happy New Year.