Have a 1997 gmc k1500,5.7liter tbi.starts fine

Check the fuel pressure at the shredder valve, the valve is along the fuel line by the distributor cap and there should be 62 to 65 PSI. Anything different will give you a not start or run, The other things too that would stall the engine would be a faulty oil pressure sending unit, anything less then 4 psi will shut the engine down and a faulty ignition module will do this too. Once the module heats up it fails, it's common for moisture to develop in the distributor and corrosion occurs to the wires leading to the module. Start with the simple and check the fuel pressure and then to the gauges, like the oil and then the ignition module. Good luck and keep me posted, be glad to help you resolve the issues to your GMC.