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#1
08-19-2011, 08:07 PM
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security light on, truck wont start
Hi, I have a 2000 Chevy silverado. I recently was having problems with the transmittion not switching correctly. Long story short the shop told me to fix the problem I had to put in
A new transmition as well as a new computer which I did, from another Chevy. It worked for a few days then The truck was not starting and had security light on. Had alarm specialist take look and he said the computer had to be reprogrammed. It was reprogrammed at merles. And was still not working. Its unable to start, starts at random once in a long while. ignition switch was changed and still gave same problem. Took to another shop they had a specialist take a look and he said the computer had to be reprogrammed again. Does anybody have any ideas or ran into something similiar. Also would it be possible to bypass the anti theft system by adding a remote start, or cutting some wires. I just really need to get this truck running, Thanks all help is much appreciated 
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#2
08-20-2011, 03:05 AM
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Re: security light on, truck wont start
Quote:
Post back code no. If you have a aftermarket add on security or remote start system remove it and see what it does.
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Remember proper testing gives us the answer to many problems. MT
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#3
08-20-2011, 03:07 AM
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Re: security light on, truck wont start
What is engine and model size and transmission and 2/4W?
__________________
Remember proper testing gives us the answer to many problems. MT
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#5
08-20-2011, 04:20 AM
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Re: security light on, truck wont start
We also need the code no from body computer security system.
__________________
Remember proper testing gives us the answer to many problems. MT
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#6
08-20-2011, 08:33 AM
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Re: security light on, truck wont start
explain the no start .. does the engine crank ?
changing the computer and transmission is not a common repair with shifting issues..what were the shifting issues ? where is the old computer ? what vehicle did the replacement computer come from ? since I am familiar with your area , you do need a secure properly working anti thieft system for your vehicle ...trucks like ours are the pick for being stolen. just to be sure about whats going on measure the fuel pressures..53-62 psi is required..if below 50 psi it will not start..also you will get no DTC failure codes.....
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#7
08-20-2011, 09:21 AM
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Re: security light on, truck wont start
Yes after the new tranny was bought it continued to have shifting issues
The guys i took it to told me it was the computer , that mine was not working anymore. So I got one Off of another Chevy truck I found in a junk yard. The shifting issue went Away but soon the security light came on and truck was unable to start. The engine cranks But it won't start. Now these new guys say I need to have computer reprogrammed again. I'm starting to lose faith tho, and might just take it to the dealer. Before doing so and being charges a fortune aside from what ive already paid I just wanted to see if anyone else had similar issues or just advice on How to get it started, we know its the passlock anti theft system just gettin the same Suggestion from a second shop, on having comp. Reprogrammed. Already did that , bit they said that's what it is. They ruled out. Ignition switch, so what's left
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#8
08-20-2011, 11:38 AM
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Re: security light on, truck wont start
Quote:
The dealer is the only good place to get a VCM reprogramed. I would suggest you dump the aftermarket remote start and anti theft in the trash can.
__________________
Remember proper testing gives us the answer to many problems. MT
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#10
08-20-2011, 02:17 PM
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Re: security light on, truck wont start
Quote:
Or get body computer codes and post back codes.
__________________
Remember proper testing gives us the answer to many problems. MT
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| The Following User Says Thank You to MT-2500 For This Useful Post: | ||
gmtech1 (08-20-2011)
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#11
08-20-2011, 07:32 PM
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Re: security light on, truck wont start
Quote:
still as I stated before check the fuel pressure..this must be 53 -62 psi just key on engine off..... WHAT IS THE PRESSURE POST BACK WHATS UP ! AUTO ZONE SHOULD HAVE THE PRESSURE GUAGE FOR YOU TO USE ! I've been out to your town many times ..
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#12
08-20-2011, 08:53 PM
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Re: security light on, truck wont start
Low battery voltage on starting will sometimes set off the security on the truck. Had a 98 s-10 that sometimes it would start but most times let the engine spin over but not start. Come to find out at starting the voltage droped just enough to let engine spin over but not enough to start. Security kicked in on the low voltage stopping the fuel pump from working. Put new battery on and no problems after that. Security light came on about half the time. Also the computer you got, is it 2 or 4wheel drive chiped. They may be different, don't know thats out of my league but just a suggestion that someone else may know answer to. Good Look
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#13
09-06-2011, 11:05 PM
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Re: security light on, truck wont start
a bad ignition switch can cause similar issues.
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4x4Junkie 2012 silverado 1500 ext. cab LT Z71 4x4 with allstar package 5.3L V8 Flexfuel with 6 speed AT Onstar / Sirius XM Factory Tow Package Electric Brake Controller Silver Ice Metallic 265/65/18 Wifes Vehicle 2014 Kia Sorento EX AWD 3.3L V6 Toys 2007 Yamaha VStar Silverado 1086cc 45 degree vtwin Grey and Silver GPS positioning locator installed
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#14
09-07-2011, 07:16 PM
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Re: security light on, truck wont start
I had similar no start issue , a while back and j cat got me squared away with dirty and wet pcm , that is located near battery , had it opened dried cleaned and repacked , not a problem since, however that may not be your problem because here in maine we have 10 months and 2 months of bad sledding, and roads are crappy most of time
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