fuel guage not registering on 2005 Buick LeSabre

the tach and speedo acted up, pulled the fuses to the cluster they were fine re started and speedo and tach worked but not fuel this car sat for 1 1/2 years b4 we purchased it. i did replace the battery yesterday

1 answer
This is likely due to the fuel level sending unit in the tank. If it has been sitting that long, the level sensor is stuck and causing this problem.