Originally Posted by swartlkk

IO, it definitelly sounds like there is something amiss in your engine/computer control somewhere. When was the last time you did a full tune up (plugs and wires)? Is your engine running good? My Bravada has what seems like surges in acceleration. I replaced the plugs, wires, cap and rotor and it did wonders for the engine, but the surging was still there. I cleaned the throttlebody and Idle Air Control motor and it got even better. I even went so far as to completelly clean the EGR system, which again helped, but like I said before, I have confirmed that my O2'* are very slow to respond with my autotap. Your problem with mileage could be anything from bad gas to O2 sensors that are on their way out. I always recommend when it'* time for a full tune up on most vehicles to replace O2 sensors when you do the rest. A bad O2 sensor could foul new plugs over a shorter period of time as well. You should get it checked out because you are just wasting money on gas right now! Figure around $200 for a full tuneup (probably would be less - and only get AC Delco O2 Sensors which are cheaper from GMPartsDirect.com). If after the tuneup you get 22mpg, that'* 7mpg better. You'll pay off that $200 in less than 500 miles (with a premium fuel price of $3/gal - it'* higher here now).

Good luck!

Originally Posted by laylowcustoms

I have an SLE and get an adverage of 27-28 with city and highway driving. I know I dont have the supercharger but I feel that I have enough power the way it is.

I have a question though. Are SLEs a limited edition? I eithere see SEs or SSEIs. Its like I'm hte only SLE