1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

Is your Gas Guage Wacky

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Old 11-12-2005, 03:30 PM
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I believe all the newer GM cars have a delay in them. My dad has an 02 Silverado 4x4 and the gas guage is very accurate, and doesn't move at all.
Old 11-12-2005, 07:37 PM
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After replacing the fuel pump in my '99 Bonneville, I think I understand why the gauge is so wacky. It'* the shape of the tank. I was always puzzled why the first half tank on the car lasted so long and then plummeted after that.

the tank is L-shaped with a pretty thick vertical bar of the "L" and a very slim horizontal part. I think that explains the problem.

Lately, my gauge has been fluttering back and forth between full and empty with a fillup, but I discovered that not completely topping it off solved that. It'* not worth the cost of a new fuel sender to me; it'* merely an annoyance.

Almost every car I've ever owned has had some strange anomaly; I guess my Bonneville'* no different.

I really watch the trip odometer more than the gauge, anyway.
Old 11-13-2005, 09:59 PM
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Originally Posted by jrw1234
Mine car has only three buttons. It has the performance shift, normal shift, and traction control.


Your sender may be hosed. My 95, virtual twin to yours (other than ccr/elc :p ) works just fine. One thing I noticed when I replaced the fuel pump in my 93 SSEi, however, is that one of the baffles had broken. Up high, just forward of the sender. It'* possible that may have happened to yours, and a piece of plastic may have lodged in the pivot.

Or your sender is just hosed. Maybe corrosion on the connector under the car?
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