I smell gas in the cabin of my 2008 chevy impala, it has 70,000 miles ... the smell wont go away any answers??

SOURCE: Inside the cabin strong gas smell after fill up

One major reason for this kind of problem is filling the gas-tank too much. I suspect over-filling the gas tank in your case.
Driving within the highway speeds increase the amount of pressure created in the gas tank, which would likely result in leakage. Over-filling the gas tank should be avoided at all times, because each time the specification is exceeded, the system would not be able to handle it. So it is very likely to experience some leakage under this cirumstance.
On this car, the gas tank is located under the second row seat covered by the carpet. It could help to give the gas tank a good check to see if perhaps the fuel-pump gasket needs replacing. Another reason to check up the fuel-pump area is to make sure that no major damage had occured in the gas tank area with the previous owner that was not properly fixed. To get to the fuel-pump:
a. Start the engine.
b. Relieve the fuel pressure in the system by pulling out the fuel pump fuse. The fuse for the fuel pump is located in a box under the left side of the dash. Once the fuel pump fuse is pulled out, the engine stops, and the pressure is relieved. Turn off key in the ignition.
c. Open the hood and remove the negative terminal of the battery.
d. Take out the second row seats by activating the levers under them. Then pull back the carpets also from the second row seating area..
e. Remove the four screws holding the access cover of the fuel-pump. And then remove the electrical plug on fuel pump's sending unit.
f. Use a large pliers with rags to loosen the plastic lock-nut. Or consider a special loaner tool from a reputable autoparts store.
g. Disconnect the fuel-line hoses, noting their previous installed positions.
h. Take out the fuel-pump. Check the seals for cracks, distortions, etc.

NOTE: When returning back the fuel-pump seal, the seal must go in the hole first.(This method lets the seal avoid getting pinched or distorted). Then gently lower the fuel-pump assembly into its hole.
i. Reconnect the fuel-pump electrical connector; reconnect the fuel-pump fuse and the negative battery terminal, return back the second row seats and the carpets. Start the engine, and look for fuel leak.

SOURCE: I have a 2008 chevy impala. The car suddenly

ur vehicle is in limp mode[ a safe mode ] which will get u home trying not to cause any damage to engine --theirs a few reasons the vehicle will do this-low oil pressure-transmission problem-have vehicle scanned most auto stores such as auto zone / advanced auto [check ur local area]do this service for free the code gives u a start point towards resolving ur problem

SOURCE: how much does the 60000 mile service usually cost?

There is no timing belt. your owners manual has a list of what needs to be done at 60k I would call the dealer then another independent shop. make sure you are comparing quotes evenly.

SOURCE: how do i change the cabin air filter on a 2008

The Cabin air filter is located under the cowl on the passenger side (below the bottom of the windshield). There is just one push type retainer in the outside corner of the cowl the needs to be pulled out and the cowl cn be pulled up just far enough to remove and install the cabin air filter, which just slides in and out.

SOURCE: 2008 chevy impala ltz wont start, first message: service stabilitrak, second message: battery saver active, what can i do to get it started?

have the battery ckecked then ck. 4 security codes and alt. output should be around 13.5 eng running