[hatzie]

Originally Posted by 72velle

Are the parts #s listed GM part #s?

All of them except the Pico number are GM part numbers.

Download the GM parts books and look up the temp sender for your rig.

The gauge will work.with the wrong sender. However. It will not work as intended. The needle position will be off.
No automobile or truck temp gauges were/are highly accurate but using the wrong sender makes em much worse. You can just "get used to it" or put in the correct sender.

And the Idiot light switches will not work at all for a gauge... it's unfortunately pretty common to find that too.

Language is important... it avoids confusion. For instance gauges take senders but idiot lights take switches and manual transmissions have flywheels but automatics have flex plates. The parts goons and retailers use the tower of Babel approach mixing up the wording and it's predictably confusing. One of my pet peeves.