2011 CADILLAC SRX WILL NOT START. LIGHTS AND REAR HATCH WILL OPEN SO DOESN'T SEEM TO BE THE BATTERY???

Steve Pack has a good point, but I will take a stab at the answer anyway.

Did you disconnect the battery when you were playing with all the lights? If so, you have to reset the security system and engine immobilizer.

However swapping bulbs to LED seldom works and this is why. Your lights are monitored by the Body Control Module. You know that little light on the dash that tells you that you have a light out, well that comes from the BCM rather than the ECM. Also LED bulbs have an electronic control circuit in them and that sends back signals to the BCM that it doesn't understand. Your high end vehicle is fully computerized and you can't play with electrics, especially adding anything that is connected to ECM or BCM. Your vehicle has a complicated 5 volt computer bus network in it.

Put the bulbs back, see if that fixes it.

https://www.google.com/search?q=2011+cadillac+srx+computer+bus+system

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Klinketo open
You can also cable Slot to fully engage

Several possible causes: If the rear hatch is not closed properly, or the "closed" sensor on the hatch is malfunctioning, the lights will stay on. They will also stay on if the dimmer control on the dash is turned all the way on, or if there is an interior lights switch on the headliner light is in the on position.

Could be the remote(have it checked) or the receiver in the vehicle. Have the codes checked.

I am betting your alternator is shot and not charging the battery. The symptom would be everything is dead on the dash and lights. Battery will need to be fully charged and alternator replaced. Make sure to have the alternator checked for free at an auto parts store first.

Testing would need to be done , scan tool hooked up checking DTC'S - diagnostic trouble codes . View data etc...
Keyless Entry System Description and Operation - Active
The keyless entry system is a vehicle entry device. The keyless entry system is used in conjunction with the door locks to unlock the vehicle. Keyless entry will lock/unlock a door or open the rear compartment lid when a corresponding button on the keyless entry transmitter is pressed. This is accomplished by the transmitter sending a radio frequency to the remote control door lock receiver (RCDLR). The RCDLR interprets the signal and activates the requested function via a serial data message. A low transmitter battery or radio frequency (RF) interference from aftermarket devices, such as 2-way radios, power inverters, computers, etc., may cause a system malfunction. High RF traffic areas, such as gas stations that use pay-at-the-pump RF transponders, may also cause interference that could lead to a malfunction. Keyless entry allows you to operate the following features:
• Door lock/unlock
• Rear compartment lid release
• Illuminated entry lamps
• Panic alarm/Vehicle locator
• Remote vehicle start

Your best bet , take it to a qualified repair shop . Dealer

Have you tried to change the batteries again?

Hello! In the Left Rear Fuse Block is the Reverse lamp fuse (10A)....The Reverse lamp relay is also located in that box...If the fuse doesn't fix it replace the relay...The relay is low cost....$6...See picture below...guru...saailer



ACDELCO Part # D1755A

I’m happy to help further over the phone at https://www.6ya.com/expert/david_6df67de3b14de867

The battery might need replaced in your remote.

Hi, my 2005 Cadillac SRX rear hatch is locked and will not unlock, do anyone have an idea or have come across the same proble. Thanks