Remote wont open hatch, also button in cab wont open hatch.

Visit an on-line parts supplier and purchase a new switch/touchpad for inside of the rear handle. Local parts supplier probably won't have it. You can replace it yourself. I did when I owned one of these part pits.

Question edited for clarity.

The remote start is tied to the Lift Hatch. Your vehicle was likely not locked, so when you double clicked the lift hatch, it did what it is supposed to do and opened the hatch. If that is not the case, take it to a remote / alarm installer to check the programming.

How To Remote Start A Cadillac Escalade? - VEHQ

https://vehq.com > how-to-remote-start-cadillac-escalade
Jan 5, 2022 - 1. Press the lock button on the key fob to secure the vehicle. 2. Press the liftgate button on the key fob twice. Take note that not ...

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It sounds like a relay or interlock is bad. Get close to the hatch and listen for a click sound while pushing the remote button. If you don't hear anything, it will be the relay under the dash or the wire has disconnected from the interlock.

It needs a latch...I am chrysler level 2 tech and have changed before with same problem...
It also happens to certain jeeps with rear hatch...although it isnt a recall yet but it should be.
The internal release mechanism wears at the pivot eventually wont open at all but should have a emergency release button at inside center..........Hope this helps Metalpoet

/the back hatch wont open without the remote. Is there another way to get it open? Most trucks have a handle or putton or something. Does this truck?

I have a problem the back door will not open with key remote or just by the touch pad. That I know of is there a release button or something to open the back hatch.

With regards to the lock bittons on the driver and passenger side its the button themselves aka switch(s) that is your culprit. Why because the remote is getting the motor to open and close them . The only thing that doesn't is the buttons /switches themselves .
Now the rear latch a little different animal. Either the locking mechanism on the door itself is defective or the motor ( the thing you hear clicking) is weak.
This one your gonna need a shop manual for to do the correct testing.But being that te remote will not move it and neither will the manual push button I would lean towards the locking mechanism on the hatch/door its self. Use the shop manual its not that bad of a fix if you have a little patience.

I found this URL on internet http://www.chefseattle.com/blog/site-news/suburban-rear-liftgate-wont-unlock-how-to-fix/ It might fix your problem. Also while you have the panel off, consider doing the fix rear wiper how to tip I have posted before it fails.

The lock is stuck in the "locked" position.
When you close the hatch, it is jamming the latch hook into the wrong area.

Manually open the hatch. Unlock the hatch (even tho the hatch is already open). there are two bolts holding the metal "loop", the loop has moved. Adjust the metal loop and close the hatch / lock it, etc.

the unlock or popper for the door needs to be replaced. the door should work with a key.