LilBean1982

It’s not too loud…. for me anyways. I have flowmaster dual chamber 40 series. The noticeable gain in power is what I was after and did receive.

I realize that’s a possibility. That’s why I’m reaching out to see if there’s others out there with similar issues.

Thanks. I will look into this.

It’s my truck. I will do as I please. I’m not complaining about anything nor expecting GM to repair it. I simply came here to see if anyone else knew of similar problems along with the cause or possible fix. Thanks for your two cents anyways.

I didn’t state anything about expecting GM to pay for the repair. I myself know that the exhaust mod would void the warranty. Don’t know what post you read but thanks for your unneeded response.

The downstream O2 sensor on the driver’s side was throwing a code indicating that the corresponding cat was not working properly anymore. It appeared clogged somewhat and also discolored in some spots. The passenger side one never threw a code nor appear bad in any way. I’m considering upgrading the rings along with a few other engine components but would hate to spend all kinda money not knowing if there’s something causing the rings to go bad. I know I’m not the only person that has the flashpaq for the 6.2L but can’t find anything else online about similar issues.

I removed it and installed the factory tune and they said nothing about it.

I’m new here so bare with me. I have a 2020 Sierra with the 6.2L. Back in November I was on the interstate and while passing a few vehicles my truck started smoking like crazy. I took the nearest exit and crawled beneath the truck and noticed engine oil was leaking from the rear main seal. At the time I had around 73,000 miles on the truck. I brought it to the dealership and they changed the seal which took them two weeks. The night I got the truck back I passed up a vehicle on a single lane highway and it happened again. So the next day I brought the truck back to the dealership again and they change the rear main seal in two days. Well this time it lasted about a week and it blew out again. So back to the dealership. This go round they did more test to figure out what the cause of the problem was and Found out that #1,7,&8 cylinder rings were bad which was allowing blow by into the crank case and was blowing out the rear seal. After having the truck for one month they decided to put in a new engine. I forgot to mention during that time the modifications I had were K&N cool air intake, airaid throttlebody spacer, Flowmaster exhaust, and superchips flash pac handheld tuner. After getting my truck back with the new engine everything was fine. I decided to gut out the cats and installed 02 sensor simulators to prevent the engine light from coming on. Well here we are 10,000 miles later and the rear seal has blown again. Same scenario of punching the gas to overtake a few vehicles on the expressway. I’m so frustrated. The 100,000 mile warranty on the new engine is now voided due to exhaust mods which I think is crazy. Can’t find anything online about others with the same issue. Has anyone here experienced or know of another situation like this? Any thoughts on what the cause could be. Thanks in advance.