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Hello guys, I am having trouble with a 99 Tahoe with 175,000 miles. First of all, a little background. Shortly after purchasing the truck, it blew a head gasket. Well, one of the heads had a crack and needed to be replaced while the other was machined. After completing all these...

Hey guys! A couple of questions for those in the know. My wife's Tahoe started running rough and smoking slightly. I took it to the auto parts store and had it scanned it detected multiple misfires and bank one too lean. Well, I changed all the plugs and wires and found 1,3,5, & 7 all (bank...