Hooley17

I will have to look.

How do you tell if its mexico engine or american engine. The truck was built in fort wayne indiana.

I have a 2020 GMC Sierra 1500 AT4 with the 6.2L. I have noticed while driving the truck that it blow blueish gray smoke out the back while leaving from a stop sign. Sometimes it is very large some times you can barley see it. Doesnt happen all the time. I changed my oil and after 2000 miles the low oil level light came on I was down 3 quarts of oil. I immediatly made and appt with the dealer. They told me I needed to do an oil consumtion test. So I did that. In 1000 miles I was down 1 1/4- 1 1/2 quarts of oil. They told me to bring it back in 500-1000 miles again. That was unexceptable to me. So after a few phone calls the dealer took the truck in to look at it. They had to call the GM engineers and talk with them they found that cylinder 7 had bad valve seals and valve guide. They replaced the entire cyclinder head. I picked it up on friday after them having it a week. I drove the 11 miles home. On saturday I drove 70 miles and sunday night on my way to work 23 miles it blew a big puff of smoke again. So monday morning I took It back to the dealer and told them it wasnt fixed. They look at it and on tuesday they said they vouldnt find any issues with the truck and for me to pick the truck up. So I reluctantly did. Called GM help line. I already had a case because thats the only way the dealer would look at my truck and explained the situation. The escaladed it up to their SR advisors. So I waited 2 days to hear from them just to repeat myself of everything that was said in the first 2 conversations. They tell me they have to reach out to the service manager and will call me back on monday. So yesterday they call me back just to tell me that they havent been able to get in touch with thwm and they would call me back on weds. So meanwhile I am driving a brand new expensive truck that smokes when it wants to and burns oil. The dealer has already told me its normal and wanted me to except that for an answer. So far not good customer service from dealer or GM. I guess a smoking burning oil issue isnt a safty concern. I have taken videos of it happening because the dealer cant replicate the problem and says it doesnt exsist. Showed the video to them and they say a cloud of smoke is normal.