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Posted on Dec 16, 2010
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I have oil leaking from my 1993 GMC Sierra. It's coming from around the oil cooler,where the 2 steel lines run into it. It's a steady stream.

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  • Master 480 Answers
  • Posted on Dec 16, 2010
Anonymous
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Joined: Oct 02, 2010
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They should be quick disconnect connections you remove them and the plastic clip peace is what breaks and leaks.

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Related Questions:

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Oil cooler above oil filter is leaking how do you get off and fix it. The two line's will not come off

There is a spring clip that holds them in. If you buy a new line assembly, they usually come with a plastic tool to release the clips. Once the clips are released, you usually have to pull and wiggle the line to get it to come out of the fitting.
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I have a 1993 gmc sierra Z71 4wd with a 350 i started my truck and it was running for a minute and heard a gurgling sound and looked under my truck and there was a puddle of oil underneath with a steady...

You need to remove the filter and unbolt the oil cooler assembly from the block. There is a large O ring that seals the cooler assembly to the engine block. Replace it. Also examine or replace the fittings where the lines attach to the side of the cooler. It is bound to be one of those issues.
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Oil is poring out in a steady stream as it's running, and looks to be coming from right about the oil filter and housing.

check the filter,could also be the oil sending unit check that also.











TIM...................
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I have a 2003 gmc sierra 5.3 liter vortec why does my truck leak oil only under pressure

because your oil pressure rises to around 40psi when running and will leak at the weakest place,check your oil sending unit first and seals.






Tim
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My 93 gmc sierra 4.3 v6 has a hole in its oil cooler lines

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Ihave a 2000 gmc sierra that has a oil leak down

check for 2 steel cooling lines going to the radiator for leaks at the transmission....but more than likely the oil is coming from the valve covers...if you fix it use the rubber gaskets. if it doesn't leak much just hose the tranny once in a while for it is a rough and it is expensive undertaking at a garage.....it pro is not the rear main seal-which is also not a picnic....keep a check on you eng oil level.....luck to you
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Transmission fluid leaking from bottom of transmission/not transmission pan steady drip!

It is NOT the transmission pan gasket or bolts ?
You have 2 trany line coolers, 1 fill tube, and the tailshaft seal, all could be culprits.
I would say clean the botton of the trany pan off completely, and see if it leaks WITHOUT the truck running.
Then start the truck and see if it leaks, if not, then put it in drive, and see if it is leaking.
Please let me know so I may help you further.
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How do you get the oil cooler line loose at the filter housing to replace the o ring on that line on 4x4 1996 gmc k1500

there should be 1 nut and stud holding the lines to the housing. I would suggest replacing the upper o-ring for the oil filter adapter at the same time. The oil cooler hoses are also prone to leak, if so, you want to replace evreything while you are there.
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Need to replace transmission line to the cooler on a GMC Sierra

Its fairly easy, you dont have to replace the fittings at the cooler. if they are leaking up at the cooler, it needs to be replaced, but if not, its just simple line to line, not too long of a process

please rate well! hope this gives you the info you needed!
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