It is screewed into the drivers side head beside the first spark plug in the front.
it screws into the side of one of the heads.
THE temp sending unit 4 the inside gauge usally has 1 wire & the sending unit 4 the Computer has 2 wires.
NO they are not the same.
There is a temp sensor on the water inlet for the PCM, and sending units for the gauge on the side of the heads. Normally part stores don't carry the sending units.
Probably either the sending unit or a loose connection.
To fix the temp gauge check the temp sending unit first. A bad sending unit is a common problem with the temp system.
it is located on the bottom end of the head
Next to the thermostat housing.
check the temp sending unite on the water intake
Which sending unit? Oil pressure sending unit? Engine temp sending unit? Fuel gauge sending unit?
What fuse controls the mirror and compass and temperature in a 2003 Chevy tahoe
more then likely it could be the temp, sending unit. or a bad wire to temp, sensor!!