"Water in Fuel " light on - how to drain water from fuel filter on 96 GMC 6.5? Help..
 

I have noticed that when I start my truck, 96 GMC K3500, the "Water in Fuel" light comes on and will stay on for about 1 minute before turning itself off. I never saw that light in my 97 Burb' - in fact I did not think we had the ability to drain water from the 6.5 fuel filter set up.

I owned a 03' 7.3 Powerstroke that had a specific water drain valve and a short piece of hose to drain the water.

What/how is the process of draining water done on the 6.5?

Do I need to drain it since the light does not stay on?

Any and all help on this topic is appreciated.
Thank you!

~GOD BLESS~

john

Very near the thermostat housing is the WIF drain Tee valve,with the engine running open that valve-water comes out on the ground first then fuel-close it when clean fuel comes.

Might want a bucket under the end of the hose or pull it up and drain into an empty container.

Excellent - I drove the truck today and will look for the T valve. Is that the same one you open up when you are running the engine and you want to see if the lift pump is working?

~GOD BLESS~

john

The very same one.