fuel pump

I just replaced the fuel pump in my OBS '99 Tahoe 4WD but the guage is not returning accurate fuel levels. For instance, yesterday it said I was empty
but when I filled up I could only put 20 gallons in a 30 gallon tank.
Does the fuel guage need to be recalibrated to account for the new fuel pump?
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here. All logos and trade names are the property of their respective owners.