![]() I'll let you know about this '21 once I get a few miles on it. Jus another tool for you to evaluate the truck you are considering. The average speed when I traded it in was 44MPH. My 2017 for example was used mainly in the summer months on road trips and was not a daily driver in the winter months. High average speed indicates a truck that was used on the highways on trips where it maintained higher speeds. Low average speed may indicate the truck was left idling or used around town as a daily driver. You can get a good idea how the truck you are considering was used by dividing the engine hours into the mileage and get an average speed of the truck over it's life time. I have not seen this posted anywhere before so I will share it for those looking for a used Duramax. Overall I don't think you can go wrong with the Duramax. Realize this is an older thread as I was looking for info on the '21, but wanted to share my reason for loving these trucks and yes I have not had the nightmares others have suffered or my opinion might be different. I could have kept the 2017 another few years, but why wait at these values. You just can't beat the Duramax for holding value. I just traded my 2017 Duramax with 49K and got $53K trade in value and walked away with a fully loaded 2021 LTZ, tax, license and 10-year extended warranty and rebates for $21K out of my pocket. It makes it easy to trade up when you get so much value on a trade in. If you wonder why I trade them in every 4-7 years is because these trucks are in high demand and really hold their value like nothing I have ever seen in my lifetime. I do a lot of towing going to car shows all over the country in the summer months (I am retired) and the Duramax has never failed me, not even a flat tire (knock on wood). Arriving this week, maybe today and can't wait to run that 10-speed Allison through the gears. That truck got 22MPH when not towing with cruise on set at 70MPH. Traded that in on a '17 and only issue was leaking OnStar antenna on the cab. Transfer Case Pump Upgrade and Repair Kit - Seal Driver and Pump, Duramax 261XHD 263XHD 2001 - 2007 Merchant Automotive 2 1,183 USD ARB RD197 9. Traded that in on an '12 and had a couple sensors replaced. Traded it in on an '07 which was a great truck, no issues at all. I had an '01 and solved the injector issue with a Cat Filter first out of the tank, then on to the OEM filter which was not a good filter and allowed a lot of junk through to the Injectors before I added the CAT filter. New Turbo, New EGR, bunch of new electronics, and DPF replaced (all warranty of course, but still. ![]() I got rid of it with about 7k miles on the clock. 06+ they have the 6 speed Allison I had an 2010 that was a total POS. IIRC its the 04-05's that have some issues with overheating on heavy loads. *Helps reduce backpressure and restriction for faster turbo response.I have not had a bad one, a few small issues easily solved under the warranty or a solution found on this and other sites from members who always help. 04.5-07s are generally the most favored models. *Size: 5” diameter exhaust tip - 4” diameter tube *High Temperature Corrosion Resistant Stainless-Steel Clamps *Easy installation – no welding required. *304 Stainless Steel – fully-polished exhaust tip, mandrel-bent tube, and band clamps *This product retains all factory emissions components including DPF filter* Sounds great, looks great, and upgrades your truck with long-lasting performance. ![]() Install our new reduced-restriction exhaust system to ensure your truck works at its best. Turbo-charged engines need as little exhaust restriction as possible in order for the turbo to spool up faster and work more efficiently. PPE Duramax T304 Stainless Steel,4"Inch, Cat-Back Performance Exhaust System with Polished TipĤ” 304 stainless steel high-flowing Cat-Back system single exhaust.
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