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How do I remove and test the oil pressure.

Tiny
BOBALLENCAR
  • MEMBER
  • 1991 GMC SONOMA
  • 139,000 MILES
How do I remove and test the oil pressure sending unit on the 4.3 l auto transmission with a/c. I think the needle on the dash is just flipping back and forth rapidly like there is something wrong with the guage in the dash. Do not want to replace gauge inside dash as I have had this area apart before and it is very difficult to get all of the a/c controls hooked back up. Is there a special tool required to remove the sending unit or just a tool that I need to purchase such as an open end wrench?
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Sunday, February 10th, 2013 AT 12:08 PM

3 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
There is a socket for this available at a parts store.

Use a manual gauge to verify pressure. The sender is a common failure

Roy
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Sunday, February 10th, 2013 AT 12:10 PM
Tiny
BOBALLENCAR
  • MEMBER
  • 2 POSTS
What is a manual guage, the sending unit is electrical
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Sunday, February 10th, 2013 AT 12:28 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
You can rent one from a parts store to insert where the sender goes on the motor to verify the actual pressure

Roy
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Sunday, February 10th, 2013 AT 12:30 PM

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