2004 Chevrolet Tahoe Questions

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All engine parameters okay. No over heating, Oil okay. Water temp ok. No leaks. Radiator fan not rubbing. No reduced performance. etc. Noise occurred for two wks then code P0420 appeared, bad O2 sensor? When driving 20mph + no noise (?)(probably can't hear), then at idle rattling again with rotation. Miles 106000, been a really good vehicle. How is a defective Catalytic converter related to following engine rotation?
My car is overheating I changed the water pump changed the thermostat and still overheats but I don't have the electric fan so it's not the fan motor what could be the problem
This just started today, there are no noises, nothing sounds or runs different, the tahoe just won't shut of when i turn the ket to off. If I cannot get someone to help me then my tahoe will be running all night long.
I have a 2004 Chevy Tahoe that is making loud popping noise when I start it up it sound like it coming from the passenger side of the truck up front
My 2004 LT Tahoe driver seat keep coming on by itself and doesn't want to turn off
Front seat a/c system is working properly, air is cool/cold but the back side row seat a/c is not working at all.
When driving stop running engine cuts off
My truck seemed to drive a little funny the past few days...I drive to work ac worked fine, go to lunch nothing but hot air. Thanks in advance.
I only had mixed gas for a weed eater with me I put some of it in my Tahoe. Then got to gas station added fuel drove a lil ways it did same thing. Hooked to computer and got the following codes what do they mean? Ui255 xfer, PO 336, po 174, po 171, po151?
Just changed the oil 4 weeks ago.
The engine light came on as I started my vehicle yesterday morning. The engine is running smoothly, all the gauges are within an acceptable range, vehicle hasn't stalled
The light truns on right after we trun on the car
light continues to be on even though it has been reset.
60 side won't go down anymore. I see where the cable broke. Can it be fixed?
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