Ignition problem making my service engine light come on. I ran a diagnostic and it said cylinder misfire on multiple cylinders...and also said oxygen sensor problems. This truck is suck a P.O.S. I have really lost my faith in Chevrolet.....I have a coolant lossn (ghost that drinks coolant), oil loss (possible gasket leak), ignition issue, and a bottom end rattle (also knocks like crazy on startup). I change my oil every 3,000 and take pretty good care of my truck. Please help?

Update from Mar 7, 2010: I took my truck to a GM dealer and they replaced Spark Plug Wires, O2 Sensor, and cleaned the entire Fuel Inject. System and guess what.....cost me $650 and the service like came on 20 miles from the dealership!!! General Motors needs to start making quality vehicles fast or I'm done! I have a Toyota Tacoma with close to 200,000 miles on it. The only thing I've ever had to replace is brake pads and rotors. Something is wrong with this picture!

The engine light has being coming off and on for about a month periodically and the truck seems like it wants to stall when idling. The truck was at the dealers service center for 3 days and they did a diagnostic test on it and it is showing something wrong. So they followed the procedures and they can't come up with anything. They took the truck to the GM dealer and they did the same thing and again can not figure it out. So now the are giving us a unrepaired truck back and telling us to pretty much hope for the best and of course a bill to go with it, since they can't fix it, it is not covered under warranty. There must be someone that knows what they are doing out there.