Fuel gauge not accurate after replacing fuel pump

[Knotjohn]

Hi,
I recently replaced my rotted out fuel pump with a Delphi "correct" part numbered fuel pump module and now the gauge is appearing to be inaccurate showing faster fuel consumption so when it is getting low, it's only taking 14-16 gallons instead of 20+. Any one else experience this? The Tech that installed it did not confirm the number on the pump to the number on the box....

 

[Knotjohn]

By the way, 2005 Tahoe LT 5.3 non-flex with a 26 gal tank....

 

[01ssreda4]

Mine did this as well. Luckily there is a section in the pcm that allows you to alter the fuel level needle. I adjusted it until it was accurate. I think I had to lie and say the tank was smaller to get the needle to move to the correct position. Retarded I know, just glad I have hptuners. No clue why it read wrong.

 

[treehan77]

How'd you do this

 

[01ssreda4]

HPTuners software, maybe a tech2 could do it also.