Chevrolet 6.6 burning oil
Been a diehard Chevrolet gas, engine truck person my entire life. Use them very hard in my landscaping business, and the 6.0 gasoline never missed a beat. unfortunately the 6.0 gasoline is nonexistent...
Forum Discussion
Grit: 2024 has the 10-sp. Personally, I am keeping my '21 6.6L with the 6-sp. Unless you have driven this truck with this engine - the tranny is dialed in perfectly on the 6-sp.
As for oil burning - I think about 10% of the users on the Facebook 6.6L gasser group complain about it. There was a TSB issued by GM in 2020 about it but it only mentioned the 2020 models and was never extended to 2021 etc. I am not sure that this detail matters, given that it is the same engine. My '21 is not consuming oil, for example, however, I have been told by a dealer that some oil consumption is normal. Check your oil regularly like with any other vehicle you have ever owned?
Other than that - I think everyone who has towed/hauled with one of these trucks has been pleasantly surprised, myself included - and I came from an '06 Duramax/Allison and a '16 6.7L Powerstroke. Like some people here seem to have a visceral hate of GM - after owning the Powerstroke - I now have a deep disdain for Ford's quality control. If you are looking into gassers, Ford's 7.3L Godzilla sounds like a better/bigger/stronger engine but if you have ever been burned by owning a Ford that had all sorts of problems, well, the GM is the ticket. BTW, if you are worried about oil consumption - this is the only "problem" with these engines. Spend some time on Facebook on the 7.3L Godzilla groups to see the litany of issues they have been having with everything from spark plugs to transmissions to.... Same with the 6.4L HEMIs - the 8-sp ZF tranny may sound great but then ask about the lifter issues. I conducted a survey on the 6.4L HEMI FB group when I was doing research on the gassers and 11% of the owners on the group reported a lifter problem early into the truck's ownership.
As for oil burning - I think about 10% of the users on the Facebook 6.6L gasser group complain about it. There was a TSB issued by GM in 2020 about it but it only mentioned the 2020 models and was never extended to 2021 etc. I am not sure that this detail matters, given that it is the same engine. My '21 is not consuming oil, for example, however, I have been told by a dealer that some oil consumption is normal. Check your oil regularly like with any other vehicle you have ever owned?
Other than that - I think everyone who has towed/hauled with one of these trucks has been pleasantly surprised, myself included - and I came from an '06 Duramax/Allison and a '16 6.7L Powerstroke. Like some people here seem to have a visceral hate of GM - after owning the Powerstroke - I now have a deep disdain for Ford's quality control. If you are looking into gassers, Ford's 7.3L Godzilla sounds like a better/bigger/stronger engine but if you have ever been burned by owning a Ford that had all sorts of problems, well, the GM is the ticket. BTW, if you are worried about oil consumption - this is the only "problem" with these engines. Spend some time on Facebook on the 7.3L Godzilla groups to see the litany of issues they have been having with everything from spark plugs to transmissions to.... Same with the 6.4L HEMIs - the 8-sp ZF tranny may sound great but then ask about the lifter issues. I conducted a survey on the 6.4L HEMI FB group when I was doing research on the gassers and 11% of the owners on the group reported a lifter problem early into the truck's ownership.
