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it is apparently in limp mode and because you insisted on driving and not stopping to find the problem it has finally shut down to protect the engine or transmission
run the fault codes and fix what is showing
I suspect you have some loose connections or shorts in the wiring harness. I've had similar strange things happen with an Olds Bravada. Various transmission shifting problems, faults, etc. that all seemed to come from the engine's computer system getting incorrect voltages and readings due to wiring faults/shorts.
MAKE SURE YOUR ENGINE FINE TUNE. CHECK TRANSMISSION FLUID LEVEL.IF FLUID LEVEL OKAY.DO A FILTER AND TRANSMISSION FLUID CHANGE IF ONE HAS NOT BEEN DONE A LONG LONG TIME.SOUND LIKE TRANSMISSION SLIPPING. IF FLUID + FLUID LEVEL OKAY AND FILTER HAS ALREADY BEEN DONE.YOUR TV SHIFT CABLE LOOSE NEED ADJUSTING. IF YOU SEE A CHECK ENGINE LIGHT FLASHING LOOK FOR TRANSMISSION FAULT CODES LIKE TORQUE CONVERTER CLUTCH SOLENOID OPEN OR FAULTY TORQUE CONVERTER.YOU COULD HAVE FAULTY SHIFT VALVES.BEST GET CAR CODE SCAN.YOU HAVE MANY SHIFT VALVES.