I recently retreived codes from a 1997 gmc K1500 and it was for low 02 sensor activity and heater circuit. I actually did a live feed and watched that sensor, and it had WAY less activity then the others, so I'm going to replace it. I wouldn't waste my money relacing a post cat. sensor, it is only there to measure cat. effiency, and will have no effect on your mileage. If you're getting good mileage, and the truck is running good, just leave it alone.
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Today's Featured Article - Tuning Up Your Tractor: The Battery - by Curtis Von Fange. Buried somewhere beneath the sheetmetal, under the gas tank, or stuffed in front of the radiator is the battery. This elusive and neglected component of the tractor is the hardest to get to when it is dead and in need of a jump. But usually, the storage battery is a storehouse of electrical energy waiting to be released a the flick of a switch. A few maintenance tips and periodic cleaning will keep it charged for the duration of its life span. The battery is made up of a number of lead bas
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