I purchased this vehicle at the first of the year. Around every 500 miles it say "cleaning exhaust, KEEP Driving". So you go on the freeway for 30 plus miles for the notice to go away. It does not give you options to delay or do at another time or anything. I talked to the dealer ship about how inconvenient this is and it has to be done right damn now. So you have a choice, you can make the damn truck happy and keep driving and miss you job interview or doctors appointment or have to take it to the dealership for repairs which is not covered by the warranty. The truck now has 5300 miles on it and it has happened (12) plus times. Has used over (12) gallons of DEF during this time. I have never heard of a car that dictates when you have to drive it and how long. What the hell. The dealership says this is normal. I spent $70k on a damn truck that tells me when and how to drive it. I had a 2015 GMC 2500HD Diesel and never had a problem in 38K miles and (4) years.