Dec 12, 2009 #1 E Eric Active member Joined May 11, 2008 Messages 1,110 Reaction score 0 Points 36 I have a 2001 GMC Sonoma 4.3L V6 my gas mileage is going down. I have keep up with maintenance. I have changed oil and filter, air filter, spark plugs and wires, tire pressures good. Is there something I'm missing?
I have a 2001 GMC Sonoma 4.3L V6 my gas mileage is going down. I have keep up with maintenance. I have changed oil and filter, air filter, spark plugs and wires, tire pressures good. Is there something I'm missing?