These 90 degree fittings work well when making custom transmission cooler lines for your 2001-2016 Duramax. This set includes 1 long and 1 short fitting setup for 10AN hose. Use the option menu to select Bellhousing port size.
Fitment:
2001-2002 Small Port Bellhousing (3/4-16)
2002-2016 Large Port Bellhousing (7/8-14)