2003 tahoe engine light on solid but flashes while driving and feels like its gonna stall out coming to a stop

Any recent engine repairs ? Trouble codes ?

The Cat Converter mat be almost blocked ,this can cause this fault. To Check place your hand close to the tail pipe end, a blocked exhaust will make a hissing sound and a continuous pressure will be felt. On a good system you will feel a short pulse as each cylinder fires. The Hiss and pressure will increase with engine speed on a blocked system

I am guessing that it will start only for a second or two then stall out. Well for this you need to turn the ignition on and then try to start the engine. Then leave the ignition on while the security light flashes. It should then stay on solid after about 10 minutes. When light stays on solid then turn off ignition for about 20 seconds then try to start. It should start up. Hope this helps.

could be a bad plug even know they are new one might be bad , first check in the dark for any arcing (blue sparks) coming from wires might be a split in one of the spark boots ,make sure on there good,also a chance you put wire to wrong cylinder

the only thing i could think of is a fuel shut off switch malfunction

WHEN THE ENGINE MANAGEMENT LIGHT COMES ON YOUR MANUAL NORMALLY SAYS TAKE IT TO THE DEALER, AND THE STALLING IS PROBABLY A LIMP HOME MODE

Is it turbo, do you have the check engine light on?

Go to Advance or Auto Zone and have them run an obd scan on it and it will pin point why your light is on and could solve your problem. This is often done for free.

when the check engine comes back on get it right to a computer at your local mechanic so you can tell what the problem is

WHEN ENGINE LIGHT IS FLASHING,IT IS INDICATING AN ENGINE MISFIRE CONDITION..CHECK SPARK PLUGS/WIRES FOR CARBON TRACKING..BURNT LINES ON SIDES OF PLUGS AND IN WIRE BOOT..IF ANY PRESENT,REPLACE PLUGS AND WIRES