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2003 Pontiac Montana w/1SA Pkg 4dr Reg WB

2003 Pontiac Montana
Trim Info:
Front Wheel Drive, 4 Door Reg WB, 2WD Minivan
19 mpg city / 26 mpg hwy
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March 24, 2011, 1:36 pm

Kevin L

Question: gas gauge not reading properly

My gas gauge on the dash is not working properly. when i start the car it always says full then it says full when i drive. If i stop at a light or anyplace for longer then 2 minutes it will go directly to empty. Thankfully I keep track of miles so I know I don't need to fill up until i drive 340 miles. (I usually fill up at 315 miles though)

March 25, 2011, 7:44 pm

Ron W
Expert Mechanic

You'll need to test the sending unit the wiring, and the gauge to figure out which on is the problem. From your description, I would tend to think it is the sending unit, but it needs to be checked before you spend money to replace it.

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