passkey, 2003 chevy impala

 i have a 2003 chevy impala i removed my remote start/alarm the problem that i am have is something i causing the caR not to crank and when the key is in the on position my gauges do nto register correctly full tank of gas i will say low fuel. if i dissconnect the battery and  let the car sit for 10 min the gauges will regidter correcty until i try to start it does this have somrthing to do with the passkey as far as i saw all the wired lookrd to be intact

if the car does not start on the inatial start i have to disconnect the neg battery terminal and i wait about 20 min and then it might start i totally uninstalled the system and i am going to start over.

GM Passslock systems lock down the car when an invalid attempt is made, happened to me when I hooked up the bypass wrong, it locks out the fuel as well if I recall correctly.

That may be why the guage reads wrong? (That did not happen, but the car refused to start for 10 or so mins). If the guage worked before, it is the R/S that caused the issue most likely, so start all over and hook up the R/S w/ out bypass and try to R/S with a key in igntion (on, run,etcc..), then do the bypass to see if it is the unit or bypass creating the headache.