Have an '01 Aztek- the fuel gauge is very sporadic- if you put gas in it goes all the way to full, then about 2 gallons before you run out, it drops to empty. Once a month, it actually shows correct amount for about 10 minutes. Any idea how to correct this?:confused:

Sounds like bad fuel sender. If Gauge reads full and you remove wire from fuel sender, and drops to empty, sender more likely, any reading may indicate sender wire shorting
Somewhere. A service manual will tell resistance of sender full tank, and empty tank.
Could measure resistance. Check sender ground also.