OK, so I bought this 97 Chevy Silverado 1/2 ton EXT Cab truck. The head on the left bank was cracked from who knows what. It has a 350 FI engine in it (not TPI) and I tore it down, had the block checked and all the right stuff done. Slapped some new heads on it and Voila!, so I thought. I plugged everything in to the proper ports (so I thought), yet I have 1 plug still missing a home.It is round, not oval, with 2 prong ports. It part of a brach from the main harness along with both A/C plugs, coolant neck temp sensor, harness ground, both plugs for T/B and some funky thing next to the thermstat neck. It has got to be for the A/C because my clutch isn't kicking in but there are no more ports that I can see. Can anyone help me with this problem?

 

it goes ointo the BACK of the compressor...small..black....careful,the pins are DELICATE...don't force anything.

 

where on the back, I already have 2 plugs in there, 1 by clutch and 1 by by hard hoses in the back.

 

Right on the ***..

You have THREE plugs...the clutch coil...the sensor (green) on the hoses...and hi-pressure cut-off....opposite end of the belt.....route the plug over the compressor,there is a "clip" for the harness on your right..and sort of follow the path of your upper hose....on the BACK of the compressor itself

 

FOUND IT! was looking at it all along. thanks for the info.

 

cool..she chills now?