I got a good laugh when I took my 2020 Silverado in for its first oil change which was complimentary, whoever changed the oil put the next oil change was due in 3K miles. I didn’t know my dad for father in-law (both mechanics) were still alive. Both of those men believed in 3K oil changes and they never met each other ever I their life.
When I took my pick-up in for its first oil change they put either 3000 or 5000 mile schedule on it. I reminded them the manual says 15,000 (I bought it from this dealership.) The mechanic gave me an excuse of "we can't change our computer to print 15,000." He said it would be ok to go 15,000. Since I had it under warranty I keep it at 10,000 so I don't go over.
