Just curious where people are getting the diesel oil changed? I’ve used the dealer 2x now, which is atypical for me (usually 30-50% more for standard oil changes there). But with the diesel, I feel like I’d rather use the dealer. I called Goodyear and Firestone. Goodyear had no idea “we’ve never done one”, and Firestone said $200, which is $40+ higher than the dealer. I’m not interested in a DIY for the diesel. It is a small benefit to have the maintenance records in the GM system.