Is your Bowtie Straight?
First things first. Have you done all the proper maintenance? New plugs-Delco or OE type from Auto, Champ, or NGk, new ignition wires-BWD or Taylor, switched to any Synthetic oil-0W30 or 5W30, ran fuel system cleaner thru gas tank to clean combustion chamber of carbon build up, checked Distrib Cap and Rotor for signs of defect or excessive wear, ran a can of Cat Cleaner thru gas tank to clean carbon build up from EGR, O2Sensor, and Cat Conv, installed a new Air Filter, a new PCV valve, a mid range thermostat, and changed your AntiFreeze-Dexcool should be changed every 2 years or 36,000 miles. 5 years or 150,000 miles is for suckers that want their intake gaskets to blow. When you have done all this and still have said problem then and only then would I consider major surgery. You can pay me now, or you can pay me later. Long live Chevrolet.
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