Can Someone tell me what this electrical plug is for on Oil Pan? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

65blackfleetside · 08-02-2018, 10:21 AM

You guys rock I could never finish this build without this form!!
So I am looking for an oil port to install my aftermarket electronic oil pressure sending unit. The cover plate drill and tap method next to oil filter is a no go- aftermarket header pipe is way too close.

This large plastic hex nut plug is located below the starter on the oil pan.
LS motor is 2005 Truck LS3 5.3. There is no lead from my new BP harness for this plug. Not sure what the factory GM intent was for it?

**nsb29** · 08-02-2018, 10:48 AM

Quote:

Originally Posted by 65blackfleetside

You guys rock I could never finish this build without this form!!
So I am looking for an oil port to install my aftermarket electronic oil pressure sending unit. The cover plate drill and tap method next to oil filter is a no go- aftermarket header pipe is way too close.

This large plastic hex nut plug is located below the starter on the oil pan.
LS motor is 2005 Truck LS3 5.3. There is no lead from my new BP harness for this plug. Not sure what the factory GM intent was for it?

Is for your oil temperature there is a sending unit at the back of the motor for oil pressure the same place as a small block

65blackfleetside · 08-02-2018, 12:34 PM

So this used for Oil temperature? is this port too low on the block to put an after market oil pressure sending unit? I need to install the one that goes with my after market gauge set.

Correct me if i am wrong? :

I need to run 2 oil pressure sending units: one for the OEM style LS harness -located near firewall top back of block. and the one for the after market gauge set with matching ohms range of oil pressure gauge. This other sending unit came with my gauges set.

greentruck · 08-02-2018, 01:20 PM

There is no oil pressure provision wired into the BP harness unless you specifically requested it . No need for two sensors. Just switch out the existing oil pressure sending unit with the one that came with your gauges and run that right to the gauge or control box. Read page 9 of 12 in the BP instructions.

Macdaddy1 · 08-02-2018, 01:26 PM

Just did this on my 5.3 ls swap. I had to buy an adapter for the autometer oil sending unit that screwed into the back of the block where the original 5.3 oil sending unit was located.

65blackfleetside · 08-02-2018, 02:33 PM

Got it thanks guys.
I assumed the ECM needed oil pressure readings? I will unscrew the OEM Oil Send unit and replace with the aftermarket gauge sending unit. My gauge kit came with some thread adapters.

greentruck · 08-02-2018, 02:39 PM

Yup. I used Dakota Digital gauges and both the temp sender and oil sender came with adapters. I ended up putting the temp sender for the Dakota Digital in the passenger side head and leaving the stock sender in the drivers head for the PCM.

Willie Makeit · 08-02-2018, 03:05 PM

that is an oil LEVEL sensor, not an oil temperature sensor.

NC_John · 08-02-2018, 07:24 PM

Quote:

Originally Posted by Willie Makeit

that is an oil LEVEL sensor, not an oil temperature sensor.

Yep!

**truckdude239** · 08-03-2018, 12:21 AM

Oil level

greentruck · 08-03-2018, 08:05 AM

Do any of you guys use the oil level sensor on your swaps?

ls1nova71 · 08-03-2018, 09:27 AM

Quote:

Originally Posted by greentruck

Do any of you guys use the oil level sensor on your swaps?

No. That's for people who don't know how to open the hood. The level has to be lower than any gearhead would allow his engine to get for it to turn on the light....

greentruck · 08-03-2018, 09:31 AM

Quote:

Originally Posted by ls1nova71

No. That's for people who don't know how to open the hood. The level has to be lower than any gearhead would allow his engine to get for it to turn on the light....

Gotcha. That's what I figured.

ls1nova71 · 08-03-2018, 09:46 AM

To be honest, I did hook it up on my first swap in my Nova, but it has never come on, so seems kind of pointless now!

sprint_9 · 08-03-2018, 10:08 PM

It comes in handy if you have an early gen 4 with DOD, I had one that burnt so much oil it would come on around 900 miles. Under half or more throttle conditions it would have enough oil up in the motor that it would trip that sensor, about 2 quarts low.

08-02-2018, 10:21 AM	#1
65blackfleetside Registered User Join Date: Nov 2015 Location: Central Florida Posts: 215	Can Someone tell me what this electrical plug is for on Oil Pan? You guys rock I could never finish this build without this form!! So I am looking for an oil port to install my aftermarket electronic oil pressure sending unit. The cover plate drill and tap method next to oil filter is a no go- aftermarket header pipe is way too close. This large plastic hex nut plug is located below the starter on the oil pan. LS motor is 2005 Truck LS3 5.3. There is no lead from my new BP harness for this plug. Not sure what the factory GM intent was for it? Attached Images __________________ current ride 1951 AD Chevy 5 window 2004 LS Gen 3 [/B] 1965 fleetside Sold

08-02-2018, 12:34 PM	#3
65blackfleetside Registered User Join Date: Nov 2015 Location: Central Florida Posts: 215	Re: Can Someone tell me what this electrical plug is for on Oil Pan? So this used for Oil temperature? is this port too low on the block to put an after market oil pressure sending unit? I need to install the one that goes with my after market gauge set. Correct me if i am wrong? : I need to run 2 oil pressure sending units: one for the OEM style LS harness -located near firewall top back of block. and the one for the after market gauge set with matching ohms range of oil pressure gauge. This other sending unit came with my gauges set. __________________ current ride 1951 AD Chevy 5 window 2004 LS Gen 3 [/B] 1965 fleetside Sold

08-02-2018, 01:20 PM	#4
greentruck Registered User Join Date: Feb 2009 Location: Ormond Beach, FL Posts: 208	Re: Can Someone tell me what this electrical plug is for on Oil Pan? There is no oil pressure provision wired into the BP harness unless you specifically requested it . No need for two sensors. Just switch out the existing oil pressure sending unit with the one that came with your gauges and run that right to the gauge or control box. Read page 9 of 12 in the BP instructions. __________________ For some people driving is one long series of corrections...

08-02-2018, 01:26 PM	#5
Macdaddy1 Registered User Join Date: Dec 2017 Location: Niceville Florida Posts: 347	Re: Can Someone tell me what this electrical plug is for on Oil Pan? Just did this on my 5.3 ls swap. I had to buy an adapter for the autometer oil sending unit that screwed into the back of the block where the original 5.3 oil sending unit was located.

08-02-2018, 02:33 PM	#6
65blackfleetside Registered User Join Date: Nov 2015 Location: Central Florida Posts: 215	Re: Can Someone tell me what this electrical plug is for on Oil Pan? Got it thanks guys. I assumed the ECM needed oil pressure readings? I will unscrew the OEM Oil Send unit and replace with the aftermarket gauge sending unit. My gauge kit came with some thread adapters. __________________ current ride 1951 AD Chevy 5 window 2004 LS Gen 3 [/B] 1965 fleetside Sold

08-02-2018, 02:39 PM	#7
greentruck Registered User Join Date: Feb 2009 Location: Ormond Beach, FL Posts: 208	Re: Can Someone tell me what this electrical plug is for on Oil Pan? Yup. I used Dakota Digital gauges and both the temp sender and oil sender came with adapters. I ended up putting the temp sender for the Dakota Digital in the passenger side head and leaving the stock sender in the drivers head for the PCM. __________________ For some people driving is one long series of corrections...

08-02-2018, 03:05 PM	#8
Willie Makeit Registered User Join Date: Oct 2013 Location: Alabama Posts: 1,234	Re: Can Someone tell me what this electrical plug is for on Oil Pan? that is an oil LEVEL sensor, not an oil temperature sensor. Last edited by Willie Makeit; 08-02-2018 at 04:29 PM. Reason: spelling

08-03-2018, 12:21 AM	#10
truckdude239 Senior Member Join Date: Sep 2005 Location: Lewisville, Nc Posts: 10,237	Re: Can Someone tell me what this electrical plug is for on Oil Pan? Oil level __________________ David fuller Ase Certified Mechanic Click here to help support our board!! 1971 Chevy c-10 under going a 4.8l LSx swap Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=421305 2007 Honda Accord my daily 145kmiles 2002 Honda Accord 4 door With 330k(sisters car) 2005 toyota Avalon 228k( brothers car) 2002 Sububran 5.3 245k 2000 Tahoe 5.3l 378 General manager for Marco's Carwash & lube

08-03-2018, 08:05 AM	#11
greentruck Registered User Join Date: Feb 2009 Location: Ormond Beach, FL Posts: 208	Re: Can Someone tell me what this electrical plug is for on Oil Pan? Do any of you guys use the oil level sensor on your swaps? __________________ For some people driving is one long series of corrections...

08-03-2018, 09:46 AM	#14
ls1nova71 Registered User Join Date: Dec 2009 Location: Independence Mo Posts: 4,119	Re: Can Someone tell me what this electrical plug is for on Oil Pan? To be honest, I did hook it up on my first swap in my Nova, but it has never come on, so seems kind of pointless now! __________________ My '72 short bed build. http://www.ls1tech.com/forums/conver...6-0-4l80e.html 5.3 swap into my RUSTY '71 C10 http://ls1tech.com/forums/conversion...71-c-10-a.html

08-03-2018, 10:08 PM	#15
sprint_9 Registered User Join Date: Nov 2012 Location: 9 Posts: 862	Re: Can Someone tell me what this electrical plug is for on Oil Pan? It comes in handy if you have an early gen 4 with DOD, I had one that burnt so much oil it would come on around 900 miles. Under half or more throttle conditions it would have enough oil up in the motor that it would trip that sensor, about 2 quarts low.

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