It's an absolute joy to drive, and the engine is fantastic Unfortunately, with barely 3k miles on the truck, i've had significant two issues that have required return trips to the dealer A forum community dedicated to chevy and gmc duramax diesel owners and enthusiasts Come join the discussion about modifications, towing, classifieds, troubleshooting, maintenance, and more! I have a 2023 gmc sierra hd3500 6.6 duramax March of 2025 the valve body failed after 23,000 miles, which around 6,000 miles was hauling 3,000lbs, no more
The failure happened when the transmission had an extremely hard shift at 55 mph and then went into 5 gear limp mode Computer through code p0700 and p0747. I have a 2022 3500 dually duramax now and haven't had any problems so far and was wondering if there is any advantage to buying a new truck Thanks in advance for any pointers Notably, all affected units covered by gm safety recall number n242454440 are equipped with duramax diesel engines Vehicles from the same nameplates and model years that are equipped with gasoline engines use a different transmission and are not affected.
The tech said it was a recall. Come join the discussion about modifications, towing, classifieds, troubleshooting, maintenance, and more Just read this article, and it sounds like 2025 will be the last year for the 3.0 duramax I hope it’s not true I only have 17k on my 23 and was hoping to trade it in for another in a few years The beloved duramax engine has just gotten killed.
(still working as of october 2025) i got tired of people asking me for wiring diagrams You will not be able to find it by searching.
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