[HUMMERcustoms.com/TAZ]

doc the e3 at summit does not look right on summit by your link. Call local big name parts store.

Take a rag and spray carb cleaner on it then with engine off clean inside and repeat till inside of throttle body is clean. Next spray carb cleaner through the throttle body slowly with engine running just to the point of not choking the engine down at fast idle say at about 800 to 1000 rpm. As the engine chokes stop spraying and let it get back to normal fast idle which you will need to do buy holding open yourself or someone sitting inside to watch tach holding rpm up open at a fast idle before you start spraying. This will help clean valves of carbon build up. While you have air duct system off take a Q-tip and clean the wire in your MAf sensor inline. Do not touch with fingers or put allot of pressure on it. It is not supper fragile just use caution.

doc I have never been able to go by the extend service time frame. It just seems wrong to me. Let others help advise you also. If it was my rig I would be changing plugs, wires, and coils along with the throttle body/valve cleaning I think you should be running real good. I would use almost the complete can of spray to put through throttle body and valves. Save some to just spray and clean the outside of throttle body.

Well hope I have helped a little. Oh use 2003 as year model as one website did not have 2002. I would think local part store should help.

TAZ