2011 Tahoe no crank no start need help

[davidavidd]

Yes

It appears that the truck is in protected mode, if so this sequence of steps may help you.

what do you need? > cell phone's stopwatch app and a charger to keep your Tahoe's battery alive during the process. Follow the steps in exact order, if you fail in just one, start over.

On page 4 you can identify which system your truck has based on the key, I hope this helps, sorry for my broken English, it's not my native language.

 

[Rockman101]

It appears that the truck is in protected mode, if so this sequence of steps may help you.

what do you need? > cell phone's stopwatch app and a charger to keep your Tahoe's battery alive during the process. Follow the steps in exact order, if you fail in just one, start over.

On page 4 you can identify which system your truck has based on the key, I hope this helps, sorry for my broken English, it's not my native language.

I have tried this a few times but security light never turns off just stays lit

 

[mikez71]

Solid plan. They did make new keys also.

Did try old keys?

 

[Rockman101]

Did try old keys?

I did

 

[Rockman101]

Ordered a mid level scanner. Should help

 

[Rockman101]

Found a tan/black wire towards the back wire harness that had been cut than reconnected. I believe this is a gmlan + wire. But not for sure

 

[Rockman101]

Found this interesting no codes on scanner to reference.

 

[mikez71]

Weird that is under starter relay control. I haven't heard of a bad alternator preventing starting before..

When you say you jumped the starter relay, I am assuming you activated the relay and didn't bypass the starter relay?

 

[Rockman101]

Weird that is under starter relay control. I haven't heard of a bad alternator preventing starting before..

When you say you jumped the starter relay, I am assuming you activated the relay and didn't bypass the starter relay?

Ya I jumped pin 30 to 87. It also turns over with scanner command mode

 

[Rockman101]

Does have new ignition and theft module. Something is off though cannot get security light to turn off