99 Tahoe engine starts and stops immediately

[hekg]

Hi all,

My OBS Tahoe's battery died and I just dropped in a new one but I can't get the truck to start.

I crank it and sounds like it's starting just fine but then dies immediately. I tried about 10 times but stopped so I wouldn't drain the new battery.

Any suggestions? Can this be the stock anti theft system intervening? If so, how do I disable it?

Thanks alot!

 

[b454rat]

Fuel pump turning on? Kick the gas tank couple times n see if that works. I had a 99 and 98 and don't remember any issues with the theft BS....

 

[east302]

Is the security light on the dash flashing?


Sent from my iPhone using Tapatalk

 

[hekg]

yes I can hear the fuel pump. I did see the security light come on but it went back out.

 

[df2x4]

Sure sounds like a PassLock issue to me. I'd try the relearn procedure.

https://www.gmt400.com/threads/how-do-i-reset-the-sucurity.10772/

 

[hekg]

Thanks for your replies. It was in fact the passlock after all.

i just unlocked the door with the key, opened the door, closed it and locked it with the key again. Then I opened it with the key again and it turned right on. Thank god!

cheers

 

[Rancher]

Hi All,
I know this is an old post so hopefully it will be seen, I just wanted to thank everyone who answer post. I have a 99 Tahoe that I took to the airport. When I got back it would start then die. I found this post on my phone. I would have never thought that locking and unlocking the driver door would fix the problem. Thank you

 

[hekg]

Glad to hear that it worked out for you.