2000 Buick Park Avenue Fuel Gauge

BUICK PARK AVENUE
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TOMMYMAC
  • MEMBER
  • 1 POST
I have a 2000 Park Ave with 175k+ miles on it. 3.8 L and she runs like a champ.

The fuel gauge has a mind of its own when the fuel drops below the 1/4 mark; the nearer I get to empty the frequency seems to increase. Sometimes the gauge reads completely full, then will drop to the correct reading somewhere below 1/4. Is there a concern for a future repair, or should I simply fill 'er up when I drop below 1/2 full?
t
Apr 9, 2007 at 7:58 AM
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MIKE H R
  • MEMBER
  • 3,094 POSTS
sounds like the fuel guage float, located in the gas tank, sound like it could be going bad.
Apr 9, 2007 at 12:36 PM
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LSUSSEL
  • ✓Experienced Mechanic
  • 252 POSTS
As my understanding, this car we speak of doesnt have a float, its got the sensor and an anti sloush module. Try this,

get a bottle of chevron techron, its about 8 bucks from any auto parts store, pour it in on an close to empty tank and then fill up with a higher grade fuel, this should fix the problem, it has worked many times for me for the cars i worked on as well , and my car did the exact same thing as you, just below 1/4
Apr 20, 2007 at 3:52 PM

Suggested Repair

Add a bottle of Chevron Techron to a nearly empty tank, then fill with higher-grade fuel. The expert said this model uses a fuel-level sensor and anti-slosh module rather than a float, and that this treatment has corrected the same low-fuel gauge behavior.

Conversation Summary

The owner of a 2000 Buick Park Avenue with a 3.8L engine reported that the fuel gauge becomes erratic below about 1/4 tank, sometimes reading full before returning to the correct level. One reply suggested a failing in-tank float. An expert said the system uses a sensor and anti-slosh module, not a float, and recommended pouring Chevron Techron into a nearly empty tank and filling with higher-grade fuel.

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