1997 Deville - fuel level readings erratic
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Cadillac DeVille 1985 to 2005 including:
1985-1992 Fleetwood, 1993 Sixty Special, All FWD Forum Discussion, 1997 Deville - fuel level readings erratic in Past Cadillac Vehicle Discussion; Just joined this forum and i'm glad I stumbled upon it. I have a question I just bout a 97 ...
  1. #1
    caddydaddy24 is offline Cadillac Owners Member
    Automobile(s): 1997 Cadillac Deville
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    1997 Deville - fuel level readings erratic

    Just joined this forum and i'm glad I stumbled upon it. I have a question I just bout a 97 deville and it has a faulty fuel level reading. Its all over the place. How can I fix that.

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  3. #2
    dqao is offline Cadillac Owners Member
    Automobile(s): 2002 Cadillac Deville DTS
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    I had a similar problem on my 2002 Deville and I replaced the fuel sending unit on the fuel pump and the problem was solved. Not sure if that will work with your model but I'm sure someone will confirm that.

  4. #3
    Submariner409's Avatar
    Submariner409 is offline If it won't run, stick on fender vents
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    Re: what's up guys!

    Fuel level sender. Drop the tank, remove the pump module and either replace the level sender - or the entire pump unit. The pumps also have a very finite lifespan.

    Let's move this up to the Deville forum for more fuel system advice. Off we go.

    Study the entire Cadillac Techical Archive way up ^^^ in the black bar, then page through Discussions, Cadillac Tech Tips for threads of interest - including lots of advice on your fuel level problems.

  5. #4
    caddydaddy24 is offline Cadillac Owners Member
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    Re: 1997 Deville - fuel level readings erratic

    Thank you very much. If it is the sending unit should I just replace the pump while I'm at it?

  6. #5
    70cougar is offline Cadillac Owners Enthusiast
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    Re: 1997 Deville - fuel level readings erratic

    Quote Originally Posted by caddydaddy24 View Post
    If it is the sending unit should I just replace the pump while I'm at it?
    Probably yes. Do you know how many miles are on the pump? If it's original, it's definitely living on borrowed time.

  7. #6
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
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    Re: 1997 Deville - fuel level readings erratic

    Check Rockauto. You can get the entire unit for less than the sender alone, depending on the brand of coarse.

  8. #7
    caddydaddy24 is offline Cadillac Owners Member
    Automobile(s): 1997 Cadillac Deville
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    Re: 1997 Deville - fuel level readings erratic

    I want to say it is the original pump. And im currently at 119xxx on the miles. And also im going to chwck rockauto. Thanx

  9. #8
    Submariner409's Avatar
    Submariner409 is offline If it won't run, stick on fender vents
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    Re: 1997 Deville - fuel level readings erratic

    Airtex #3935M module. Probably an original DELPHI/UltraPower unit.

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