Diagnostic at AutoZone says my EVAP canister is not connected on my 2000 Buick LeSabre. Where is it located?

In past vehicles, the evaporator canister was easily accessible, but not in this one. Diagnostic at AutoZone says my EVAP canister is not connected on my 2000 Buick LeSabre. Where is it located?GM puts some of them back next to the gas tank. Although just doing a scan diagnostic cannot tell you that it's not connected to the hose.