Question about 1999 GMC Suburban

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SECURITY LITE IS FLASHING AND TRUCK WILL NOT START. HAS NEW FUEL PUMP

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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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1 Answer

I put a new fuel pump and filter in my 99 chevy truck and it starts up for a couple of seconds and dies


make sure the security is not triggered. Is the light flashing? It is on if flashing when you are trying to start the truck.
Maybe your pump is not on? Sure way to tell is to put a fuel pressure gauge onto the test port on the fuel rail, then turn the key to on. Don't know your specs , but probably around 45-50 LBS of pressure. Do you hear the fuel pump turn on for 2 seconds when turning the key to on? If not, and you have no fuel pressure, you need to investigate the fuel pump wiring. Also there is a fuse for the pump, probably in the Power Distribution Center (the relay and fuse block) under the hood.

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Changed ignition switch now security light stays on and truck starts and kills


You need to relearn the passlock system (security). There are 2 ways. One is with a scanner, which most diy'er wont own an expensive one to do it this way, here is the manual way. Start the truck and let it run until it dies. The security light should then be flashing. Leave the key in the run position until the security light stops flashing (about 10-15mins). After the light stops flashing turn the key off. Try to start the truck again. It should do the same thing (run for a few seconds and then die with the security light flashing). Again wait for 10-15 mins for the light to stop flashing and then turn the key off and repeat the process one last time. That's a total of 3 times. Once you finish the process the 3rd time. Let the truck sit for a minute with the key off. It should now be programmed and start and run normally.

Jun 02, 2014 | 1999 Chevrolet Silverado 1500

1 Answer

Put in a new fuel pump car still won't start has a security light on what do we do to get it started


If the Security Light is on but is not flashing, the security system is fine. If the security light is flashing then turn the ignition key to the run position (do not start). Wait over ten minutes and then try to start the engine. After the ten minutes you should notice that the light stopped flashing. If the engine starts then you do have a problem with the Passlock Security System.

Feb 28, 2014 | Mercury Grand Marquis Cars & Trucks

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Truck is not starting but lights still turn on


If what you are saying the when you turn the key and all the lights come on and you go to start and the truck dose not turn over it could be you security system is your security lite flashing fast then that maybe your problem

Feb 21, 2014 | 2001 Ford Super Duty F 450

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2002 avalanche turns over but won't start, fuel pump changed and new battery. the message center keeps flashing low fuel,battery,and security in the on position. Truck has 6gals of gas, was put in after...


your ECU is playing up, probably thinking that it is stolen (security light) needs to visit a dealers computer, ring your dealer he may be able to reset for you

Dec 30, 2013 | 2002 Chevrolet Avalanche

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Chevy colorado 07......fuel pump or fuel pump relay issue?


get a test lite and pull ur relay out and test it if its not lighting up then check your fuel pump

May 29, 2012 | 2007 Chevrolet Colorado (Extended Cab) New...

1 Answer

The security light is on and the truck will not start. I changed the fuel pump and filter. Now the battery is dead. The sercurity light keeps flashing and will not turn off.


you need to find out what fault code is causing the security light to come on
that's why the vehicle will not start
repair that and the vehicle should start
hope this helps

Nov 18, 2009 | 1999 GMC Jimmy

1 Answer

Truck wont start. security lite on. doesnt seem


turn the key to the on position and pump the gas 4-5 times, this should help. My mom has a 03 silverado wich also done this and I contacted a dealer and they gave me this solution and it worked.

Aug 14, 2009 | 2002 GMC Sierra 1500

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