JohnZ71

Hey I have a 2020 gmc 1500 at4 with 29,000 miles on it. About 5 weeks ago I got a check engine light that cleared on its own but yesterday it came back so I was able to take it to the dealer ship. They said it was codes for running lean on Bank 1 & 2. I don't have the code #s. They tried blaming my air filter being dirty but running leans means it's getting to much air. I have an S&B intake that has about 22,000 miles on it that has been on the truck for 14 months with no issues. I'm kind of lost. Possibly a small vacuum leak? Or dirty MAF sensor? Let me know if anyone has had these issues. They said they recommended putting the factory intake back on and see what happens. Truck never felt like it missed a beat. No rough idle or power loss. My MPG has been lower ~15 mpg but I live in ohio so the Temps havnt been to friendly. I do hear a slight "hiss" on the right side of the intake manifold but it's very slight and I can't seem to find exactly what it is.

I had the same issue back in December. Dealer looked at it and ordered me a new one to install.

After searching for months and looking through thousands of pictures I finally pulled the trigger on some tires and wheels. I kept the stock tire size 275/65/18 in Toyo Open Country AT3 and went with fuel blitz in 18x9 +1. I will say I have the gm accessory mud flaps and if I would have went any bigger they definitely would have rubbed. Overall I'm happy with the set up. Wanted to keep it factory ride height. I'll post more pictures once I get it cleaned up.