Forum Discussion
KD4UPL
Apr 30, 2016Explorer
donn0128 wrote:
2004 was probably the worst of the Duramax motors. You need to find out what motor it is. Hopefully they installed a later version.
Since '04 could be had with either an LB7 or an LLY this statement is too general. The LB7 would have a 1 as the 8th digit in the VIN. These were the worst Duramax engines but really the only problem is the injectors. If the '04 is a latter version it will have an LLY Duramax. This would be indicated by a 2 as the 8th VIN digit. Many people claim the LLY overheats but this was apparently only some of them. My own LLY that I purchased new now has over 207,000 miles on it. It does not overheat and has been about the most reliable vehicle I've ever owned.
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