Well on this drive light most my check engine light came on. I have a 2016 GMC Denali diesel 3/4 ton PU 41k miles. Its been in six times in the last 18 months for a check engine light. Its always a air/ emission sensor of some sort. I think there is a short somewhere. I'll take it out in the next couple days and talk to the service manager this time. I'm tired of it. Love the truck, just fix it.
