98 dont have this.. probably like Z28/2002 said, its the air connector 
What is this connector for???
What is this connector for??? I cannot for the life of me figure out what this connector is for. I have tried the searches and come up with nothing... see attached pics. 99 TA ls1 location is the rear of the motor on driver side.
thanks in advance
thanks in advance
omar
opsu= oil pressure sending unit correct? and also i see the white connector in your picture all the way on the right side i belive that is the one that i need the info on.
opsu= oil pressure sending unit correct? and also i see the white connector in your picture all the way on the right side i belive that is the one that i need the info on.
okay look, there is the oil pressure sending unit connector, and the sensor next to it. those are the only 2 sensors at the back of the intake, am guessing your white connector is for the coils harness. if so how did you manage to get the white connector that far back! heres another pic from ls1how tos. red arrows for the opsu and the other sensor and the circle is what you need i THINK..hope that helps
i just confirmed that the white connector is for the OIL PRESSURE SENDER!!!!!!!! Went to the parts store and looked at a new part and sure enough. Now i just spent a half hour trying to plug it in and no luck yet dang lol..... Have to get a mirror and flashlight and some smaller hands..Thanks guys!!!
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i just confirmed that the white connector is for the OIL PRESSURE SENDER!!!!!!!! Went to the parts store and looked at a new part and sure enough. Now i just spent a half hour trying to plug it in and no luck yet dang lol..... Have to get a mirror and flashlight and some smaller hands..Thanks guys!!!
thanks to my tiny hands 
i suggest you look at some pictures to locate the way to it and then try feeling it but watch out its very fragile! you dont want to break it while the intake is on..good luck LS1 Tech Stories
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Verdad Gallardo dam!!! i cannot plug it in because the top 80% is broken off and has been this way since i got the car... oh well one more thing to replace.... can i take the opsu off and install a new one with this wilson fast intake installed?
depends how tight is the place..you need the oil pressure sending unit socket to remove it. i ordered it off ebay for like 4 or 5$ just take your time and watch out for the pcv hose, its very prone to breaking..
Tried to remove it without removing the intake. No go! There is something covering part of the opsu. I think it may be the valley cover? I have a wilson fast intake on there and no idea which valley cover but obviously it is not stock. I did not do any motor work to this so i really have no idea. I said screw it, dont want to remove the intake so i started the car and the broken opsu didnt leak oil so I drilled and tapped that thing above the oil filter, extended the one wire connctor and installed the opsu there above the filter. Works perfect and 70ish psi of oil pressure on the guage now WOOT WOOT!!!!!! 
yea my gauge moves. its not a dud sensor. I had lots of pressure at first cold start of the new motor (70psi). Now that i have been driving it, My oil pressure is between 30 (hot slow idle) and 50 psi (cruising), and it is still at 60 psi for a minute after a cold start. Does this oil pressure seem good?
left one is your cam positioning sensor, right one is oil pressure sending unit..
and 10psi is not fine in a ls1. expect 40 at aidle, higher when you first start it as oil is cooler. and up to 65/75 at WOT.
and 10psi is not fine in a ls1. expect 40 at aidle, higher when you first start it as oil is cooler. and up to 65/75 at WOT.
