Yes, one runs to the pcm and the other from your old engine will go to your gauges. this is the same on the temp and oil pressure.
Yes, one runs to the pcm and the other from your old engine will go to your gauges. this is the same on the temp and oil pressure.
97 GMC, 2002 LS6.
1991 GMC Syclone #1428
ok seems red told me I only need one, I broke the one off the 5.3 and he told me to just drill and tap the broken piece for the one off my 5.7
Tired ol' 5.7, 5.3 swap in progressHandle every stressful situation like a dog.If you can't eat it or hump it.Piss on it and walk away.
You can still do that if you wish, it will work either way.
97 GMC, 2002 LS6.
1991 GMC Syclone #1428
If your sensor is 3/8 NPT then you'll need a 9/16" drill before tapping. That one would not fit the block off plate above the filter without some kind of reducer.
See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709
Greg, the drill bit for 3/8-18 NPT is actually 37/64" LOL I was wondering how you get the signal to the PCM using just the vortec sensor on the 5.3 without running wires to it. It would be much simpler to run both sensors. I thought Greg just used 1 sensor, sorry for the confusion.
97 GMC, 2002 LS6.
1991 GMC Syclone #1428
I do use just one sensor. The PCM doesn't throw any codes if you don't have oil pressure. Imagine that! I would have thought it would light up every light on the dash should you have zero pressure.
See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709
This is the tap drill chart I used Lance... NPT Tap Drill Sizes - Engineer's Handbook
It seems that is the size you're supposed to use if you have a tapered pipe reamer. Works good with a hand drill too since most guys wollar a hole out as they drill, can't hold a drill straight and square ( me included )
Last edited by RedHeartbeat; 08-17-2008 at 01:11 PM.
See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709
How can I do it either way I though I had to have both on up to and one at the blockoff plate?Originally Posted by NITROUS
Tired ol' 5.7, 5.3 swap in progressHandle every stressful situation like a dog.If you can't eat it or hump it.Piss on it and walk away.
You can put a Gen3 oil pressure sending unit in the stock place at the top of the block and hook it up to the new Gen3 pcm and also have a sending unit installed into the block off plate above the oil filter hooked into the factor oil pressure wiring.
See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709
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