Question about 2000 GMC Denali

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I change the fuel pump, and when i finish a security light appears on the dash and wont start

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Ok,you will need to hook up a battery charger to it.turn the key on and leave it on for 10 minutes,turn it off for no longer than a minute,turn it back on for 10 minutes,then turn it off for no longer than a minute,then turn it on for ten minutes then turn it off,then it should start.somehow you lost your pragram in the key.this will take 30 minutes or so,thats why you need the battery charger,dont try to start it between cycles or you will have to start over again

Posted on Jan 31, 2010


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Why doesn't car turn over or start?

Your battery is very low, enough to light the dash but not to start the engine. Get your self a volt meter that plugs into the cigarette lighter (any good auto store have them). You can now see the voltage of your battery. If it is less than 10 volts, then it will need to be charged/jump started. If the battery is good with 12 volts, then check the ground cable for a good contact to frame and check that the cables are secure on the battery.

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I have a 1995 buick lesabre custom it wouldnt start and the fuel pump wasnt comin on changed the fuel pump it crunk once but wont no more and all the lights on my dash are on again

If you see a light that says "security", this would explain the entire problem. Here's a link with info and "do it yourself" options.

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Im not sure if you got your alero to start yet. But heres an Idea, The alero comes with a security feature that if you have 3 failed starts it activates. a good sign of this is while having the key turned does your security light flash on the dash. if so turn the key forward with out starting the car and leave it on for 10 minutes and then the security light on the dash should stop flashing. Now turn the key off and remove key stick key backin and turn over to start car. Did your car start ??

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You will have to have the dealer reset the security light to restart vehicle.Check all engine and chassie grounds because this is where the lighting would exit the vehicle.It sounds like a ground burnt through.

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No electircal power to Fuel Pump

some cars have an emergency fuel shut off switch located in the trunk of the vehicle check to see if that switch kicked itself off.

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