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    GM 2020 Silverado HD 6.6 Gas - Bad Transmission

    Appreciate it! And you are correct, 45k miles for that, as linked.
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    GM 2020 Silverado HD 6.6 Gas - Bad Transmission

    I'm going to have to look at my manual again for this truck. I want to say that it says the fluid level can be check, but that service is not necessary. Which to me means, the fluid is good until the part it is servicing fails, which is a bunch of crap. If it says nothing about servicing, I'm...
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    GM 2020 Silverado HD 6.6 Gas - Bad Transmission

    Okay, I saw the 3500HD in your postscript/signature and was wondering if that's what you were talking about. I saw somewhere a pairing option for the 3500HD of either GM or Alison transmissions.
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    GM 2020 Silverado HD 6.6 Gas - Bad Transmission

    I will hit 200,000 miles on the truck by the end of August. So far the truck burns no oil. The one time I took a OCI out to the 7500 miles which the manual calls for, it had burned about half or less of a quart. I would like to think if I can keep the transmission maintained and in good shape...
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    GM 2020 Silverado HD 6.6 Gas - Bad Transmission

    Is that the Allison trans, or the GM?
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    GM 2020 Silverado HD 6.6 Gas - Bad Transmission

    I have a walk-in Knapheid box on my truck. It's never done any towing. 2wd package. Weight 8,000 lbs or greater depending on how much I'm carrying.
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    GM 2020 Silverado HD 6.6 Gas - Bad Transmission

    My worktruck is a 2020 Silverado 2500 HD with the new 6.6L gasoline engine. In the summer of 2022, around 80,000 miles, I started to notice some grinding noise coming from the transmission under low revs and light acceleration. Finally, in November 2023, at 147,000 miles the transmission was...
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    Fresh Oil filter Every time?

    Want to share a few articles with all as this has helped me with understanding the basics. As to whether one should extend the use of the filter for a period different than the period a supply of oil is put into service, it will not per se help that debate, except that perhaps the debate about...
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    Using conventional 10w30 in the summer and 5w30 synthetic in the winter

    This car is not the only vehicle using my oil. I also have a truck takes 5w30, I take care of my sisters SUV, my mothers SUV, truck, and JD Gator. All take 5w30, so I figure I've got three to four years worth of oil remaining quick arithmetic, as my mother and sister take 3-4 oil changes a year...
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    Using conventional 10w30 in the summer and 5w30 synthetic in the winter

    Thank you all for the responses! Your suggestions are heard and appreciated, and your points taken. I've got a followup question, but will first try to answer any questions that were put to me. Just a meddling point, perhaps a coping mechanism to try to control something. :D I just enjoy...
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    Using conventional 10w30 in the summer and 5w30 synthetic in the winter

    (Skip to the second paragraph to get to the background of my question, and the third for my question) Hey folks, this is my first post. Realize as I write this I'm hesitant to write it, because I can already hear the obvious objections, but I gotta throw something on the wall and get my name up...
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