I am at 36% life of diesel exhaust fluid in my car. When is the best time to refill that fluid? do i need to drain that fluid before i add the new fluid in? and what are all the brands i can get besides The original GM Fluid?
No need to drain. It's a consumable fluid. Visit your dealership and they should be able to sell it there. Most shops have it in stock as it is used for diesel pickup trucks.
my father has a durmax desiel, he uses the stuff he buys on amazon, works perfectly as long as it is the blue fluid it should work.... but there is one tip that people have been giving us on the blue fluid... DO NOT RUN IT ALL THE WAY DOWN, refill it before it goes dry, it allows the old fluid to mix with the new stuff... a freind drains its and the refills it, and it has issues often.
hope that helps.
btw sorry that the refill place is in the trunk under the mat, really sucky place for it
It was designed such that it would not have to be filled before the oil is changed, so your dealership would just top it off for you at oil change time. The tank lasts quite a while as it is a very efficient vehicle.