I just changed the oil in my 2021 Chevrolet Silverado 3500 with the L8T 6.6 gas engine. Since the engine sits down and back compared to my other trucks I have to stand on a 3 step ladder just to fill the oil. Mine came with only a cap in the drivers side valve cover. Since it was just a cap there was nothing to support a funnel making it hard to stand on the ladder, lean in, hold the funnel and pour a 5 qt jug all at the same time. Using a long trans funnel helped a little but I still had to hold onto it.
I looked around and managed to find a fill tube that fits into the cover raising the cap about 3 inches and making it easier to hold the funnel in place.
The GM part # is 12668614 I got mine from Rockauto for less than $5.
I looked around and managed to find a fill tube that fits into the cover raising the cap about 3 inches and making it easier to hold the funnel in place.
The GM part # is 12668614 I got mine from Rockauto for less than $5.