I had a computer to go down on my 2004 Chevrolet silverado and I replaced it with a used one. How can I get the old memory off of it and reset it for mine

To do a reset you just disconnect the battery cables an touch them together or a jump wire between the cable ends . Let it hooked up 10 min. How To Clear Your PCM Memory On Fords After Repairs You don't need to bother with the PCM

Replacing TPS will reset the light but will stay in memory until the computer is reset. For help to change throttle body sensor check out you tube :How To Install Replace Throttle Position Sensor Chevy Silverado GMC Sierra.

No
Is the TPS slotted and needs to be adjusted?

New TPS in your old throttle body?

There would be no reason to replace the
entire thing!!

Disconnect the battery negative cable for ten seconds but make sure you get the car radio code before you do this.

the blower motor twists into case turncounter clockwise to remove there is a locking tab you may have to pull down to release

you got to hold the oil change menu button down for atleast 5 secs to clear the computer and go to 0 percent oil life used

Should not have any problems to replace battery, but do make sure you have a code for a radio before you attempt.

Seems like a lot of people have problems, but I have never had an issue changing a battery. I always drive the vehicle to the auto parts place, change i out in their parking lot. So vehicle is not without battery for very long.

Yes take your battery terminals off and hold them together for about 10 seconds that will reset your computer.

You have a bad temperature control actuator on the driver side. Before you change it make sure that it has not lost its memory . You can reset the system by diconnecting the battery for 10 minutes hook it back up and then start the truck. Turn the system on and let it go thru its reset it will do it all by its self do not touch any of the controls for about 5-6 minutes if it still acts up replace the actuator . Remember to do the reset after you put the new one in.

Talking about the "Change Oil" notification when you first turn on the key? You need to reset the indicator, by (guessing from memory, check your owners manual) turning on key, and pressing the brake 4 times in 5 seconds.
Hope this helps.
Don G.