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1999 Cadillac Deville Fuel filler neck installation.

Tiny
CREAKY
  • MEMBER
  • 1999 CADILLAC DEVILLE
  • 4.1L
  • V8
  • 2WD
  • AUTOMATIC
  • 136,000 MILES
I have removed the original rusted out gas filler neck. The vent tube on the old neck was rusted off and hanging. I cannot find the filler neck vent tube connection to the tank. Also, the connection for the charcoal canister is hanging loose, can't figure out where it attaches. The vent tube on the old neck is about 1/8", the new one is 3/4".
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Tuesday, May 12th, 2015 AT 12:39 PM

7 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
There will be 3 connections for hoses at fuel tank where pump mounts one is feed to engine other is return from engine and third one is for evap pipe you' will probably have to drop tank down to connect evap pipe it is at sender pump connection. The pic I'm sending is of filler neck and the hose to that will be by the filler neck entrance on tank.
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Tuesday, May 12th, 2015 AT 1:12 PM
Tiny
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I appreciate the help, but your answer does not tell me where the filler neck vent tube attaches to the tank.
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Tuesday, May 12th, 2015 AT 1:20 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Well I'd give a pic if I could it may be at the top I can't find a pic of one but it should be near where the filler neck connects both have rubber hoses to them. I ham including two pics one is an access panel in trunk that can be removed and other is of A tank I have put arrows where I think the vent tube may connect. It's been a long time to mess with one of these but it should be fairly easy to spot if not then drop the tank down and you'll find it.
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Tuesday, May 12th, 2015 AT 1:29 PM
Tiny
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Thanks very much, wasn't aware of the inspection hole in the trunk. Think I can deal with it now. Thanks again.
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Tuesday, May 12th, 2015 AT 1:32 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
It still may require you to drop the tank at least on the one side to see where it actually goes.
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Tuesday, May 12th, 2015 AT 3:22 PM
Tiny
CREAKY
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  • 4 POSTS
There is no fuel pump inspection hole in the trunk. After feeling around above the tank, I found the vacuum connector for the vapor canister and also the fitting for the vacuum line to the filler vent pipe. Looks like a PO probably replaced the fuel pump at some point and neglected to hook the vacuum system up. About your advice, I hope you get more out of the $10 donation than I did.
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Wednesday, May 13th, 2015 AT 5:59 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Were you dissatisfied? If not don't reply
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Thursday, May 14th, 2015 AT 7:30 AM

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