Diesel owners Question

Just changed mine today. Second time in 14k miles. Once every 15k or 12 months.

I changed mine out at 1 year and will continue to do so per the maintenance schedule. I paid $110 or so for both filters but the Amazon price for the set has since dropped to $80. You'll get some diesel on you changing out the chassis filter and you need to make sure you have a big enough socket for the engine mounted filter, but beyond that it's a simple maintenance item. About akin to changing the oil in terms of difficulty.

Definitely an important item to keep up on, imo.

I just got my first diesel and not only is that an important section in the manual, the onboard computer makes you aware of it as well. Seems like more and more people these days are mechanically ignorant. Cars are not designed to be worked on by the home mechanic anymore, so people just don't have a need to learn. I'd rather have the knowledge and not need it than need it and not have it.

If they've never heard of changing the fuel filter then they've never read the manual or looked at the dash board. Eventually the filter will clog and the truck will have no power. Then they will wonder what in the world happened.
I change mine about 10,000 to 15,000 or whenever the Chevy dash display tells me too. I carry an extra with me at all times. Once when I was really busy with work the display came on and said to change. I didn't think I had the time and kept putting it off. Sure enough, the truck's power dropped all the sudden and I pulled off the road. I put the new filter on and all was good.

Changing the fuel filter is vital in a diesel engine. Hopefully the group you were speaking with had the service done and they just didn't know about it. Otherwise I fear they have trouble on their horizon.