3" x 20 1/2" Outlet - Right with TOC holes, top vent conn.
and center vent conn.
Fits: 01- 02 Sierra/Silverado Pickup, Suburban, Yukon w/ 8.1LV8
Gasket: GM-1521G
Note: For tank without TOC holes use GM-2537T
Check top vent conn. inside diameter is 1/16".
For 1/4" inside diameter top vent conn.use GM-520.