Still can not fill the tank, only able to get 17-18 gal.

Took the vehicle to the dealer the tech inspected all the lines and tested the fuel sender all ok.

The below was stated on the invoice sheet. They said no diagnostic charge because they (dealer) did not know "if" it would work (quoted a cost of $800 +) with no guarantee.

TESTED OPER OF 1.00 EVAP SYS. CHECKED FOR BULL. AND TAC CASES OPEN TAC CASE 802921.

Any comments ideas? I have tried to search for a TAC Case 802921 (part number, what part ?)

Lee short on a fill