Question about 2001 GMC Sonoma Extended Cab
2001 sonoma pickup, poor gas mileage, suppose to get 22 to 28 miles per gallon, getting 17.5 (mostly freeway), also hard to start. Humming noise like fuel pump is going out.
Have you changed the fuel filter? I know it sounds weird but a plugged filter will make a truck use more gas. The computer tries to compensate for less fuel by commanding the injectors to open longer. Also a plugged filter will cause excess back pressure on the fuel pump making it loud.. Good Luck.
Posted on May 29, 2009
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Posted on Jan 02, 2017
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