My 99 Tahoe is not firing.

liljack2

done replace distributor coil ign module pcm what is can some one help

I have  replace distributor coil ign module an pcm an it still has no spark help please

Mr_Shiftright

Do you have a tachometer reading when you crank the engine? (this tells you if the crankshaft sensor is working)

If that's okay, have you checked the ECM fuse?

If the fuse is good, put a test light on it while you crank the engine. If the light goes OUT when cranking, you probably have a bad ignition switch.