Cadillac Escalade my 2002 Cadillac Escalade has a rough idle and cuts off after starting

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Question moved to model category.

If the Security Light is on, the anti-theft immobilizer is stopping the vehicle from running. What did you think its purpose was? :>D

With having wires cut, that makes things complicated.

https://www.fixya.com/cars/r29887709-gm_passlock_security_system

Security system I have a 99 cadillac escalade. The ... - Fixya

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Nov 14, 2019 - 30-Minute Learn Procedure 1. Turn ON the ignition, with the engine OFF. 2. Attempt to start the engine, then release the key to ON; the vehicle will not start.
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Question edited for clarity.
Question moved to model category.

All shown in this link. It is by the radiator.

https://www.google.com/search?q=2002+Cadillac+Escalade+TCM+location

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Could be the spark plug wires.

Check for vacuum leaks or disconnected vacuum hoses.

Yes, but it may not be the wires. Inspect carefully, and replace damaged parts.

It could possibly be a bad coil pack. Is the check engine light on? If not it could possibly be a bad injector. Injectors open and close to allow the proper amount of fuel in the cylinder. If the injector is not injecting, then it will cause a miss.

Add some gas...
Sounds like your gauge could be broken.

Anytime I see P0171 and P0174 together the first thing I look for is vacuum leaks. Specifically the upper intake plenum gaskets. The codes indicate that both banks of the engine are running lean. The rough run at start up and then gets better supports this.

With the engine running rough carefully spray carb spray around the area where the intake bolts to the heads. If the idle changes and or smooths out you found the leak. Be careful when doing this as carb spray is flammable.

I wouldn't worry about the P0102 (MAF code) until you figure out if there is a vacuum leak or not. If there is no vacuum leak than I would investigate that code further.

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

No service required unless the engine is idling to slow and stalling at red lights. This maintence is only requied on a as needed basis. Idle speed should be 550 to 650 rpm.

change spark plugs,check for valcum leaks. multiple misfire is spark plugs,coil or wires