I have a 2015 GMC Sierra. I locked my keys in the pickup. could you unlock remotely?

Try this forum in link below, may be helpful.
press the helpful button
Programming Remote Start Key Fob Page 2 Ask the GM Technician

Running with no oil is death for the motor ( Seized). When the alternator stopped working because the engine stopped the door lock control opened the door locks as it said you were below the required speed to have them locked

Problem could be the brake switch or the solenoid that locks the shifter in park.
You may be able to turn the key switch past lock but not on, and then take the shifter out of park. The lock solenoid would need to be tested.

Here is the way to do it.
1. Close all doors
2. Insert key into ignition
3. Hold down the power UNLOCK button on the driver's door panel, continue to hold down
until instructed to release in step 9.
4. Perform steps 5 through 8 in a fairly rapid succession.
5. Turn the ignition to the ON position (as far as you can go without starting the engine.)
6. Turn the ignition to the OFF position.
7. Turn the ignition to the ON position (as far as you can go without starting the engine.)
8. Turn the ignition to the OFF position.
9. Release the power UNLOCK button on the door panel. The vehicle should respond by
door locks locking and unlocking automatically. (If locks do not cycle after you let go,
not before you let go of the unlock button, then the vehicle has not entered programming
mode and you must start procedure over. Remove key from ignition, open drivers door
and return to step 1 ). If the locks do cycle automatically then proceed to step 10.
10. Hold down the LOCK and UNLOCK buttons on the remote until the doors lock and
unlock. This may take up to 30 seconds.
11. Repeat step 10 NOW for each additional remote. (Including any existing remotes).
12. Turn the ignition to the ON position to exit the programming mode.
13. Test remote(s).

you will need to get the panel off, there are screws in the armrest, if window crank will be clipped/screwed on then its just a matter of popping off the sides with a flat tip, lifts up and out, once panel is off you should be able to unlock door. Tim

unlock it with remote whit key in on position.

Open hood ,over headlamp assy lens there are two L shaped metal pins locked in plastic clips.Turn pin out of clips and pull them straight up,that will unlock headhamp assy so you can remove it and get to bulbs.

You will need to take it to a dealer to have it unlocked

1. Close all doors
2. Insert key into ignition
3. Hold down the power UNLOCK button on the driver's door panel, continue to hold down
until instructed to release in step 9.
4. Perform steps 5 through 8 in a fairly rapid succession.
5. Turn the ignition to the ON position (as far as you can go without starting the engine.)
6. Turn the ignition to the OFF position.
7. Turn the ignition to the ON position (as far as you can go without starting the engine.)
8. Turn the ignition to the OFF position.
9. Release the power UNLOCK button on the door panel. The vehicle should respond by
door locks locking and unlocking automatically. (If locks do not cycle after you let go,
not before you let go of the unlock button, then the vehicle has not entered programming
mode and you must start procedure over. Remove key from ignition, open drivers door
and return to step 1 ). If the locks do cycle automatically then proceed to step 10.
10. Hold down the LOCK and UNLOCK buttons on the remote until the doors lock and
unlock. This may take up to 30 seconds.
11. Repeat step 10 NOW for each additional remote. (Including any existing remotes).
12. Turn the ignition to the ON position to exit the programming mode.
13. Test remote(s).

Sounds like the button to unlock doors on the fob is worn out. You can purchase a new one or used from your local recycle yard.