2008 DTS After fueling and parking the car, the next morning fuel is down by 1/4 tank, sometimes 1/8 tank, and other times

Asked by May 30, 2012 at 04:12 PM about the 2005 Cadillac DeVille DTS

Question type: Maintenance & Repair

Loses fuel after siting overnight.  Sometimes it loses 1/4 tank, sometimes it loses none.  Cadillac says the car is
working OK.  Any help appreciated as I have a new car warranty. Just bought a few months ago.
dickturner1@hotmail.com  Autoway Cadillac

3 Answers

12,495

If you are losing this amount of fuel I would be very concerned. If it is still under warranty I would have them repair it. Bring the car to them full and have them let it sit in their shop overnight. Any leaks should be apparent to them.

223,515

It also could be a bad fuel level sensor or fuel gauge that reads higher one time and lower the next. If you were leaking fuel, you would be able to smell it when you approached the car.

2 out of 2 people think this is helpful.
12,495

Either way have dealer repair it under warranty.

1 out of 1 people think this is helpful.

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