Tagged With "Chevy Duramax"

I have an 03 Duramax and I run the standard filter. The K&Ns let too much air and particles through for normal driving. If you are drag racing and trying to squeek every last bit of HP out of your truck, then K&N might be ok. The HP gains are actually negligable on daily driving applications. The most important filters on the truck are your fuel filters and water separators. Make sure those are new and change them on schedule. I run extra filtration from a company called FASS.

Thanks. From what I am reading, its mainly an issue with 2020 and newer Duramax’s. I am taking my truck in for an oil change this week and wanted to change the engine and cabin filter first. The last time I took it in the dealer wanted $150 for both air filters on my gasser. Thats getting a little pricey for my taste.

Until recently, the Duramax trucks did not put a lift pump in the fuel tank. The last few years, the GM trucks now have one. The FASS system, in addition to the two extra fuel filters, also included a lift pump at the tank. IMHO, this is important, as it eliminates the need for the CP3/CP4 injector pumps to pull fuel from a fuel tank. As Eric mentions above, stopping water from reaching the pump/injectors is also very important. The current FASS water filter actually stops water from going...

Thanks for all the good info. I will stay with the OEM filter. I assume the dealer will check the water separator, and change if necessary when I get the oil changed? Like I previously stated first time diesel owner. I had a diesel tractor and it had a visible water separator that I could empty when full, not sure on this truck.

I had a 2004 Duramax. K&N air filter, with a oil spray on it. Dealer told me the oil gave the air filter sensor problems. As soon as I mentioned K&N air filter, both tech's rolled their eyes. Now I just buy a quality filter.

This is my first diesel truck so no experience. I have had it for about 6 months, bought used. I went online to purchase a K&N air filter for my 2020 Duramax and saw a lot of reviews that stated the K&N will cause the engine to throw a air filter error code and that you must first disable the air filter life setting and this will prevent the error code. Secondly, I saw a bunch of others claiming the K&N is not as good as quality paper filters as it lets in too much particulate. I...