1994 chevy silverado wont TURN OFF

Through your own admission, you need
to go to a repair shop, which one would
assume, you always go to

does it have a b2960 security code set, i bet it does, it probably has a security problem and is going into fuel shut off, try replacing the ignition switch harness, this is 98% of the time the problem

battery,or altenator

This could be a fuel pump issue try starting on starter fluid if it starts you need a pump.

We can diagnose on my site with diagrams and you speak with a mopar mechanic along with phone support if needed www.expertcaradvice.com

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The next time this happens and the vehicle won't start back up, turn you ignition switch off and when you turn it back on have someone listen near the fuel tank for the fuel pump to make a humming noise. Your problem may be a bad fuel pump or a bad electrical conection to the pump.

when you turn the key you should hear an electric clik sound from under the steering column. If not your ignotion switch is bad, not the cylinder where the key goes but the switch. If you do hear a click, then check your starter soleniod. This happened to me 3 weeks ago and it was my starter.

Your 20 amp fuse will not blow if glowplug wire shorts. each plug draws 15 amps which is 120 amps total.I think there are in line fuses for them. Try to wring out where each output from the fuse goes, disconnect all and reconnect one at a time till it blows.That should point to your problem process of illumination! Good Luck!!

Just from what you said it sounds like your vehicle might not be holding its residual pressure which means after you turn a vehicle off, your fuel injection system should hold a certain amount of pressure in the system, but if that pressure drops to fast your vehicle may have a hard time starting. Things to look for when you lose fuel pressure is the fuel pressure regulator may be leaking, fuel pump check valve,leaky fuel injector or they maybe a small leak in one of the fuel lines. I only suggested this cause i had a car with the similar problem.

there is a spot under the fuse pannel out under the hood that mice like to make nests and chew threw wires. its not a hard thing to pull the pannel. the cover comes off with a couple of snaps in between the motor and the fuse box.once you get it lifted out you then will need to unlatch the two on the pannel between the fender and the pannel. the pannel will flip up. if the truck sit alot there is were your problem probably is (you may want to check all the main and secondary fuses before you start)