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2001 GMC Jimmy Diamond Edition 4dr

2001 GMC Jimmy
Trim Info:
Rear Wheel Drive, 4 Door
17 mpg city / 22 mpg hwy
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March 9, 2012, 11:18 am

Javon W

Question: my gas gauge goes up an down.

when my car is in park my gas gauge goes up an down, an when i shift into a gear other then park my gas needle stops on whatever it was on when it was in park.

March 13, 2012, 5:53 pm

Ron W
Expert Mechanic

You may have a problem with the gauge itself. Most use a 5 volt bus to power the cluster. Your regulator for the bus may be failing.

I'm not sure why it changes with the shift selector, but it may be that the load from the transmission stabilizes the voltage. You should also have the charging system and battery tested as unstable DC or leaking AC (bad diode in alternator)can cause these types of issues as well.

It could be the sender, but with it changing with the shift selector, I would suspect a voltage issue more than anything else.

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