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I may have the same problem. I have a '02 Silverado 4.3, automatic 2wd with 47,000 miles. Last week, I noticed a slight surge while on the interstate. The next day, on the way home from work I noticed the service engine soon light was on. Hooking it up to a code reader said random misfire.
My truck idles fine and so far, I've only noticed the misfire when the engine is warmed up. The shop I took it to told me to run some injector cleaner throught it. Any help from anyone would be great. If you've had this problem and fixed it, let us know. Thanks.
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