04 Tahoe it’s saying transmission hot on the dash what do...

Hello and thank you for using JustAnswer. My name is \*\*\*\*\* \*\*\*\*\* I will do my best to assist you. During this conversation you will be given an automated offer for a phone call. You may accept or decline that offer.I don’t personally offer this service so if you take this another tech may call I’m sorry that you’re having trouble with your vehicle. I will do my best to help you resolve them. Please understand that I do not know your knowledge or capabilities so I may need to ask questions to find out basic information to help solve your specific problem. My aim is to give you the best service possible and to help you. If you have any questions or concerns, please don’t hesitate to let me know. Sometimes it may take a moment for me to respond because I may have to look up information about your concern. I appreciate your patience and will provide responses as soon as possible. So this could be a few things but it is probably either deteriorated fluid or driving characteristics. If you drive hard or tow and the fluid is old it will get warmer than it should and make that message pop up. I would start by changing the fluid and filter. IF it keeps coming back then I would add an external trans cooler.

It's not shifting gears eitherIt won't go pass 45 mph

It wont until you clear that trouble code and fix the issue. It is in limp mode so it doesn't hurt itself.