what else could it be?
stalls in drive or in reverse.drives good for 1/2hr or so,changed thermostat,serpertine belt,tensioner,plugs,wires,distributor....after awhile it wants to stall or not start
Do you have an automatic? So after 1/2hr of driving it will stall in gear but run fine in park and neutral, and only run if you give it gas? It's your transmission shift solenoid that has failed, making your torque convertor lockup at idle speed putting a drag on the engine.
Search Chevrolet C/K 1500 Questions
Chevrolet C/K 1500 Experts