Topic: Hello from Maryland!

[EastCoastSteve]

Take a picture of the engine bay and post it.  That can give us a good idea of any mods.

I'lll try and do that tomorrow. I took a look and nothing really looks aftermarket, but then again what do I know haha.

[2kwk4u]

Look for a sticker on the fuel door that says "premium fuel required" or a bosch sensor in the charge pipe leading from the intercooler to the throttle body.  Those are telltale signs of a GMPP tune.  If I recall correctly, the GMPP tune kit also came with an updated emissions sticker for under the hood as well.  I no longer have my factory hood, though (a deer modified it in a not so attractive way), so I can't confirm.

[DeepBlueGXP]

Put your DIC in boost and hit the gas hard, if the boost reads 14-18 then it's stock, if it hits 22 or 23, then there is tune on it already.  Also look a the charge pipe on the drivers side.  Does the sensor have one or two screws bolting it to the pipe.  If it has only one screw, that will tell you if the GMPP upgrade was done. 

[Kelu]

Welcome and happy tuning

PS: I'm the big devil from the other side of the pond, many others on your side starting with little ones