Author Topic: Oil Pressure Sending Unit?  (Read 45799 times)

Offline Shawn0331

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Oil Pressure Sending Unit?
« on: May 12, 2012, 12:36:44 AM »
My oil pressure gauge hasn't worked since I got my truck. I'd like to know what's going on. The gauge is pegged all the way out and doesn't move.

Will this solve my problem?

Or is there a different solution?
1987 Chevy V10 Silverado SWB 5.7 on 33x12.5's
http://www.shawnseeley.com

Offline bd

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Re: Oil Pressure Sending Unit?
« Reply #1 on: May 12, 2012, 02:13:59 AM »
If you have factory GM gauges, you have an open in the sender, sender wiring or gauge connection to PC board.  With ignition ON try jumping the sender wire directly to a good ground and see if the gauge drops to zero.
Rich
It's difficult to know just how much you don't know until you know it.
In other words... if people learn by making mistakes, by now I should know just about everything!!!
87 R10 Silverado Fleetside 355 MPFI 700R4 3.42 Locker (aka Rusty, aka Mater)

Offline VileZambonie

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Re: Oil Pressure Sending Unit?
« Reply #2 on: May 12, 2012, 08:27:17 AM »
Agreed, is the wire connected?
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Offline Shawn0331

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Oil Pressure Sending Unit?
« Reply #3 on: May 12, 2012, 08:50:39 AM »
I'm headed to my dad's today to do the passenger-side ball joints. I'll take a look then.

On an '87 I need to look behind the distributor and by the oil filter, right?
1987 Chevy V10 Silverado SWB 5.7 on 33x12.5's
http://www.shawnseeley.com

Offline bd

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Re: Oil Pressure Sending Unit?
« Reply #4 on: May 12, 2012, 09:51:55 AM »
Look both places, but gauge sender should be the one near the oil filter.
Rich
It's difficult to know just how much you don't know until you know it.
In other words... if people learn by making mistakes, by now I should know just about everything!!!
87 R10 Silverado Fleetside 355 MPFI 700R4 3.42 Locker (aka Rusty, aka Mater)

Offline Shawn0331

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Re: Oil Pressure Sending Unit?
« Reply #5 on: May 12, 2012, 10:48:48 AM »
Looked under the truck just now. Is this it?


1987 Chevy V10 Silverado SWB 5.7 on 33x12.5's
http://www.shawnseeley.com

Offline bd

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Re: Oil Pressure Sending Unit?
« Reply #6 on: May 12, 2012, 11:29:00 AM »
You're pointing at the O2 sensor.  I don't see the oil sender in your pix.  Do you see a wire dangling loose anywhere near the oil filter?  Take a look next to the distributor and snap a pic.

Is that freeze plug showing a little rust?   :o
Rich
It's difficult to know just how much you don't know until you know it.
In other words... if people learn by making mistakes, by now I should know just about everything!!!
87 R10 Silverado Fleetside 355 MPFI 700R4 3.42 Locker (aka Rusty, aka Mater)

Offline jason d o

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Re: Oil Pressure Sending Unit?
« Reply #7 on: May 12, 2012, 11:34:45 AM »
That looks like the oxygen sensor. I have an 86 model myself and my sending unit is by distributor. I'm sure mine is different from yours. I'm sure somebody will chime in here and give you a good picture at where it is.

Offline Shawn0331

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Oil Pressure Sending Unit?
« Reply #8 on: May 12, 2012, 08:50:45 PM »
This maybe?

1987 Chevy V10 Silverado SWB 5.7 on 33x12.5's
http://www.shawnseeley.com

Offline 454Man

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Re: Oil Pressure Sending Unit?
« Reply #9 on: May 12, 2012, 09:10:49 PM »
Its right behind the distributor... To the right alittle

Offline Irish_Alley

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Re: Oil Pressure Sending Unit?
« Reply #10 on: May 13, 2012, 12:48:27 AM »
drivers side right behind the distributor, that second one is the knock sensor
If you can’t tell yourself the truth, who can you tell it to?~Irish_Alley

When you have eliminated the impossible, whatever remains, however improbable, must be the truth ~Sherlock Holmes

Offline Shawn0331

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Oil Pressure Sending Unit?
« Reply #11 on: May 13, 2012, 08:06:46 AM »
Really appreciate all the help. I'm learning a lot!
1987 Chevy V10 Silverado SWB 5.7 on 33x12.5's
http://www.shawnseeley.com

Offline Fairlane514

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Re: Oil Pressure Sending Unit?
« Reply #12 on: May 13, 2012, 09:55:36 AM »
Thats also the wrong part from Oreilly's you refer to in your first post. You will need the one for the factory GM gauge, not Auto Meter.

Offline Irish_Alley

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When you have eliminated the impossible, whatever remains, however improbable, must be the truth ~Sherlock Holmes

Offline Shawn0331

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Oil Pressure Sending Unit?
« Reply #14 on: May 28, 2012, 01:27:57 PM »
Trying to find this elusive oil pressure sending unit to the right of the distributor... Is this disconnected wire supposed to connect to it?

I'm not seeing anything else interesting to the right of the distributor.

1987 Chevy V10 Silverado SWB 5.7 on 33x12.5's
http://www.shawnseeley.com