93, driver side, single wire, is for guage, (water pump sensor is for PCM) should be green,go to your local pick n pull for wire connector, it fits a wide variety of GM cars( go to partsamerica.com for advance autoparts for cross reference) sender is like 10 bucks. use inline splice and use heat shrink tube to seal same, beats it falling out and you overheat the aluminum head motor, also hypertech makes a fanswitch kit(195 on 175 off) that goes into the other side between cyls 6 + 8 and the connector into the main harness to PCM, that along with a 160 thermostat keeps the reverse flow LT-1 very happy( PCM fan setting is like 220), I have a 94 Firehawk and finally figured out some cool stuff, like long tube headers are a bite for speed bumps but the torque gain was awesome, I am an old motorhead, I still have my original dwell tach!!, Walt