1989 Fleetwood Brougham d'Elegance|2018 Chevy Colorado Z71
After driving my Fleetwood around for about two hours doing errands today I noticed the car at highway speeds going up an incline, the Check Engine light would come on for a few seconds then go out. Something like 5-10 seconds and everytime I went up a hill at like 63-65 MPH. Also Cruise was on, what's with the CE light? The performance didnt change or anything......