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2008 Chevrolet Tahoe Questions

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I have change hoses,thermostat,cap,all relays,radiator temperature sensor,water pump...it looks like my truck inside reads 220 and some did a laser test and looks like it was 197 degrees I really don’t have any clues... some mention computer....?.. doesn’t get hot when a.c is turn on...only when heavy traffic... Please help
Is this programmed to come on just like the oil change message?
Changed the wiper switch, motor and transmission. Check fuses, put power to the motor and motor worked. Still don't get power to the wipers.what can it be? 2008 Chevrolet Tahoe
TAHOE STARTS SHUDDERING WHEN DRIVING. DOES AT DIFFERENT SPEEDS. I CAN LET OFF GAS PEDAL JUST A TAD AND IT GOES AWAY. IF I GIVE IT A LITTLE GAS AND GET BACK TO SAME SPEED IT COMES BACK. I CALL IT SHUDDERING, BUT IT IS A SMALL VIVRATION YOU CAN FEEL IN CAR AND PASSENGER CCAN HEAR AND FEEL TOO. IT MIGHT BE 30, 40, 50, OR 60 MPH. NO CERTAIN SPEED. MOTOR MOUNTS GOOD, TRANS MOUNT GOOD, NEW BRAKES FRONT AND REAR, NEW TIRES WERE ROTATED AND BALANCE CHEC KED.
I can hear it engage but I don't see my front tire pulling
Making a 'whining' noise as revs move up and down,
while driving, all of a sudden all of the interior and exterior lights and gauges started to flicker and the door locks started to lock and unlock automatically.
They dealership calls it transmission cooler lines that were rubbing together causing fluid to run low.
which caused the transmission to go bad. There were no indicators to tell me something was going wrong. The only thing was a burning smell which caused the truck to drive slower. I pulled over to the side of the road and called a tow truck. All this happened July 11th of 2015.
when car is a idle the noise is very soft but increases with rpm.
took to a local shop and said it is coming from the timing chain area nee to know if the tensioner starts to go bad will this cause the noise or is the chain or what else it could be.

thanks
I have a 79 international scout that I did an LS swap in. The engine is a 5.3 out of a 2008 Tahoe. The trans is a 4L60 out of a 2007 Tahoe (supposedly). The transfer case is a NP241c. Today is febuary 7. Since Christmas the tranny has failed 4 times. The tranny shop said the trans oil pump is being destroyed each time. They have tried shimming the torque converter, changing out the bell housing and some other stuff. I just had the scout dyno tuned today. The Scout is running good for now but, on the way home code P0741 came up. I did some research and it says that it could be the torque converter locking up, bad valve control body or a bad lock up sensor. Can anyone please help me with this? I did this swap so I can have a more reliable vehicle. I cant even enjoy my Scout because I'm afraid of it breaking down on me. I live in el mirage, az. If you can recommend a good shop that can fix the issue, that would be a great help also.
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