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Buick Lucerne Fuel Level Sensing and Display

30 messages,  Last post on Aug 25, 2008 at 9:58 AM

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#1 of 30 Buick Lucerne: Fuel Level Sensing and Display by b88lazer Sep 20, 2007 (9:40 am)
The fuel quantity sensing and display indicators (fuel gage and DIC Fuel Range readout) have been significantly inaccurate in my 2007 DTS since the vehicle was purchased a year ago. For example: the fuel gage indicates 7/8 to 3/4 when the tank is fully topped-off; when the vehicle is started, the fuel gage indicates a completely random level which is never the same as the level existing when powered down; while maintaining constant speed and throttle setting, fuel quantity will change rapidly for no apparent reason. In addition, the DIC Fuel Range readout shows more or less range remaining consistent with the erratic gage readings. The dealer has replaced the tank fuel level sensor but the problem remains. Any similar experiences? Suggestions? Replies to this message: rmello (Dec 18, 2007 7:05 am) philip11 (Jan 02, 2008 8:08 pm) rmello (Jan 03, 2008 6:57 am) b88lazer (Jan 08, 2008 12:08 pm) rmello (Jan 09, 2008 7:19 am) b88lazer (Jan 09, 2008 9:32 am)
#3 of 30 Re: Buick Lucerne: Fuel Level Sensing and Display [b88lazer] by rmello Dec 18, 2007 (7:05 am)
Replying to: b88lazer (Sep 20, 2007 9:40 am) I am having the same exact problem with my 2006 Lucerne -purchased new. I have complained to Buick several times, by emails, telephone, letter to President of Buick, my dealership but no results. It takes twelve miles of driving for my fuel gauge to correct itself. Needless to say I am frustrated. Buick tells me this is normal and can take up to 10 miles of driving to correct itself. If -according to my dealership- I want an accurate reading before I start a trip, I should find a level spot and pull over and restart my engine. Replies to this message: philip11 (Jan 02, 2008 8:08 pm) rmello (Jan 03, 2008 6:57 am)
#4 of 30 Re: Buick Lucerne: Fuel Level Sensing and Display [rmello] by philip11 Jan 02, 2008 (8:08 pm)
Replying to: rmello (Dec 18, 2007 7:05 am) I bought a 2008 Lucerne one month ago, and I have the same problem. GMC is giving me the same BS. The guage is suppose to move around. I drove a bus for 37 years, and I know what I am talking about. Its probly the same as the dash not being seen in the sunlight a couple years ago.. They have a defect and doint know or want to fix it. Replies to this message: rmello (Jan 03, 2008 6:57 am)
#5 of 30 Re: Buick Lucerne: Fuel Level Sensing and Display [philip11] by rmello Jan 03, 2008 (6:57 am)
Replying to: philip11 (Jan 02, 2008 8:08 pm) I have been fighting with Buick for over 1 year -no results. In Nov I sent a letter to:   Jim Bunnell General Manager, Buick-Pontiac-GMC 100 Renaissance Center Mail Code: 482-A29-D76 Detroit, MI 48265-100   I received a call from Detroit just before XMAS, I am waiting for a call back. This will be my last attempt to solve this problem. Next car will not be a Buick.   rmello
#6 of 30 Re: Buick Lucerne: Fuel Level Sensing and Display [b88lazer] by b88lazer Jan 08, 2008 (12:08 pm)
Replying to: b88lazer (Sep 20, 2007 9:40 am) This message updates and corrects information in message #1 of 5 on the above subject. The vehicle in question is a 2007 Buick Lucerne CXS, not a "DTS" as originally cited. I apologize for the inexplicable brain fade and should have corrected this error much sooner.   The fuel sensing and display gripe described in my original post still exists. The fuel tank fuel level sensor has now been replaced twice with no corrective effect. The dealer's service manager subsequently escalated the problem within GM and was advised to run electrical continuity and resistance checks on all wiring and devices in applicable fuel sensing and display circuits. No problems were found. On two occasions, I've had DIC "low fuel" warnings with well over 8 gallons of fuel remaining. I've learned that other Lucerne (and some Cadillac) owners who bought from and have vehicles serviced at this dealership have reported similar fuel gaging inaccuracies that have not been solved. This problem is apparently far more widespread than GM acknowledges and the work-around fix seems to be "fill up often". Inattentive gage watchers should keep comfortable walking shoes in the trunk. Replies to this message: rmello (Jan 09, 2008 7:19 am) b88lazer (Jan 09, 2008 9:32 am)
#7 of 30 Re: Buick Lucerne: Fuel Level Sensing and Display [b88lazer] by rmello Jan 09, 2008 (7:19 am)
Replying to: b88lazer (Jan 08, 2008 12:08 pm) Good Luck with replacing the fuel tank lever. Buick replaced mine and it did not solve the problem. I belong to AAA and according to them, the problem is with the compute(s). They are programmed with incorrect specifications and Buick does not have a fix. Replies to this message: b88lazer (Jan 09, 2008 9:32 am)
#8 of 30 Re: Buick Lucerne: Fuel Level Sensing and Display [rmello] by b88lazer Jan 09, 2008 (9:32 am)
Replying to: rmello (Jan 09, 2008 7:19 am) Do you have a link or other reference to AAAs information about the Buick fuel level indication problem? That would be helpful. Thanks
#10 of 30 AAA referral by rmello Jan 10, 2008 (9:44 am)
AAA has John Paul referred to as the "Car Doctor". He told me about the fuel gauge computer problem.   Hope this helps.

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