There seems to be some misinformation and a lot of guess work on this with no solid answers. So I just finished the project and thought I'd share the cost involved and part numbers so there is no more guessing. Yes the stock 2014 Tahoe reinforcement bar-rebar fits perfectly. You also need the trailer light receptacle. It just rotates in place. The job is easy. Most difficult part is the 10 HD bolts holding the support in place are very tight with some sort of plastic liner that keep them tight. So it takes a little man power if using non air tools. I have heard people paying $760 just for the support etc. this is what I paid. I walked in and they had both pieces in stock to my surprise. If anyone is looking for these parts call Jay at Jim a Ellis Chevrolet in Atlanta Ga. I have zero affiliation with these guys and was just a random walk in. Nice educated guys. They even offered a return policy as others did not if it didn't work. I will also add the wiring is underneath for trailer receptacle and the brake controller wires are also up under the dash. Everything you need is still on these trucks regardless of popular belief. Common sense says GM didn't rebuild these trucks just for no trailer option
any questions shoot them over.
Part #25938524
Part #12191503
Less than $500 for both.
I am going to sell the standard PPV reinforcement bar with block off plate if anyone is interested. Not sure why anyone would switch but I have seen some people asking for them. I'll keep it for a few weeks then it hits the garbage. It is off a 2014 with 18k miles. No damage. If you want it shoot me an offer. Pick up is obviously ideal. They weigh a ton and shipping would be stupid although I do have the box the new one came in.
Hope this helps some people get this hitch stuff sorted out. I was surprised I couldn't find any solid answers.