GM Repair Problems? Ask GM Repair Expert Now.
How much pressure in psi do you have after cranking for 12 seconds?
I've never seen this. Honestly for me to help you need a acantool that view data and check codes because if all it need is a shot of starting fluid and it runs great either the injectors are returning too much fuel to the tank meaning bad injectors or a engine control module not controlling FPR correct. So this meanwhile, crank the engine for 15 seconds 3 times in a row, if it start you need new injectors. Remove the glow plugs and the ignition 1 relay, crank the engine over with a white napkin by the glow plugs ports, if you get a mist replace the injector. Not much else we can do with out a scanner. Thanks