You do need to provide more information-does the engine crank? have you checked it to see if it is getting spark? is it getting fuel? you can check the check engine light codes by bridging terminals on your OBDI connector and 'reading' the number of flashes on your check engine light-please provide more detailed information, and i am certain we can help you.
Hello
The Check Engine should come on and go off when the key is turned to on, then it should go off after start up and stay off unless the engine control computer senses a problem, then the light is turned back on. In the case of a no start you will need to check a few things, first check the system computer for fault codes, you can do this by reading and following the instructions at the website link below.
http://www.extreme-check-engine-light-codes.com/GM%20OBD1%20Decoder.htm
Start here, also check to see if you are getting fuel to the engine, buy a can of Starting fluid and spray it inot the air intake of the engine, if it starts and quickly dies out then you have no fuel delivery.
Hello
It would have been nice if you had mentioned all the facts, which you didn't and that means I wasted your time and mine with my comments. When the key is held in the crank position do you have battery + to the purple wire at the starter solenoid?
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Engine that wont start might fall to a lot of contributing factors e.g fel distribution, dead battery, alarm problem. Could yo give me more information on what is happening when you turn key to start position? Are you hearing click sound, engine cranks etc... Here's a link/guide for you to detect and resolve common issue for engine NOT STARTING.
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Sorry for the late reply. Sounds like there is a problem with the ignition system. To test it, turn on your headlights then have someone infront look at the headlights while you star the engine. The headlight should go DIM. If nothing happens with the headlight then you need to check the ignition system.
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when i turn the key on all gages come on turn key to start nothing . fuses are good ,also i replaced the starter cables are good .i even got under the truck with a screwdriver and the starter cranks that way. but with the key go to the start and nothing remember everything comes on but no start. i even put the truck in neutral no start
when i turn the key on everything comes on go to start nothing ,got under truck with a screwdriver jump starter it cranks that way .but turn key to start nothing put gear in neutrol and nothing
1990 gmc sierra wont crank turn key on everything comes on cables are good ,so i replaced starter and no start so i go under truck with screwdriver jumpstart and it cranks but with the key nothing fuses are fine got power but nopower with the key
1990 gmc wont crank when key is in start mode dash lights up but no start replaced starter still no start went under truck with scrowdriver jumpstart engine cranks but with key nothing, all fuses are good
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