Tgarner15

Bought a 2016 GMC Yukon XL with 52k on it last November, this spring it started throwing this code, we would put in Lucas and it would go away after a day and stay off for weeks to a month. In August it became an every other week deal, 3 weeks ago it also had a Cylinder 6 misfire where we changed all the spark plugs, it does run better overall since changing but has since came up with the same code once again and isn’t going away this time...husband and his uncle who is a mechanic are stumped, we are supposed to drive to Florida in 3 weeks for a family wedding so we’d really like to get this figured out, it’s not in warranty anymore with 75K on it now...anyone have any similar issues and resolutions!! So frustrating to have such a new vehicle with these big problems as we had to replace the condenser in it also this summer!