Some 2008-2009 Buick LaCrosse, Buick Allure and Chevy Impala vehicles may exhibit an inaccurate fuel gauge and/or DTC P0461.
Prior to removing the fuel level sending unit from the tank, perform a terminal drag test on terminals B, D and H in the eight-way connector at X405.
If a terminal concern is found at X405, replace the terminal as necessary. Interference is suspected between the end of the float arm where it is attached to the sending unit and the convoluted tubing that is part of the sending unit. To inspect for the potential interference it is necessary to compress the fuel sending unit on the bench to the same height as it is compressed in the fuel tank.
NOTE: DTC P0461 can also be customer-induced by refueling after only 50 or 60 miles or less.