Gas Mileage Way Down

[txab]

Did you go back with AC Delco parts??

 

I would change the fuel filter & drop a can of Seafoam brand fuel treatment in the gas tank.

 

Then buy a 2nd can of Seafoam to suck into the intake manifold (while running).

 

 

Isn't the fuel filter part of the fuel pump on these vehicles?

 

 

 

'04 forward, except for some flex-fuel vehicles

[rog_ski]

Wondering if the gas mileage issue could be brake related.

 

If the emergency brake is not releasing properly or back brakes are dragging at all that would reduce the gas mileage. I noticed mine was dragging when i was stopped at redlight that was on a slight grade and normally when i put it into neutral it would roll back. this time it stayed as if I had my feet on the brakes.

 

Mine has drums on the back and they needed a service.

[Rons05z71]

Dont know if you are in an area effected by this, but maybe a switch to the winter fuel blend? My mileage drops like crazy when it starts getting cold out. Either that or my alighnment just went way off

[97whitez71]

Got cats checked and they are fine. I've noticed that the low coolant light has come on a couple times but the coolant level seems to be fine. I've probably added less than a quart of anitfreeze over the lasts few months. Would a bad intake gasket cause the drop in mileage?