I have a 2011 3500 dually Diesel. On an RV forum a few people with 2009-2012 have complained about getting water in diesel fuel from service station or somewhere.

1. Water in fuel sensor did not alert
2. injectors had to be changed
3. some fuel pumps had to be changed (I believe)
4. GM would not cover anything even though the sensor did not light


My questions:
- I use the Wal-mart diesel fuel additive with each fill-up – does this really help with this potential issue
- I change the fuel filter every other oil change – is this smart to do
- Is there a better fuel filter I should use
- anything else I can do to protect against damage from a bad service station with water in fuel tank