6.6L Duramax Deisel
Good engine? What's your experience?
Forum Discussion
My '05 LLY has 138K miles and doing fine. About 50K was towing 10,500# TT, but we've entered the MH era, so no heavy towing lately. Replaced the water pump at 90K and alternator last week. It's always had synthetic fluids in the engine and tranny. Couldn't guess what the life will be.
