2007 Silverado Wont Start After Installing Ignition Switch

rmmotocrosser4 · June 7, 2011

Hey everyone I installed an ignition switch in my 2007 silverado new body and now it wont start is their some type of relearn procedure that I'm suppose to follow. It started before I installed it but sometimes it wouldnt before the installation. I also installed a new starter and battery.

nickvrebel · June 7, 2011

what are the symptoms? does it turn over? start then stop? security light on?

truckofwinandawesome · June 11, 2011

and more to the point, is it a GMT800 or a GMT900?

Duelin · June 11, 2011

Did you replace the ignition switch or the ignition lock cylinder? If it was the ignition lock cylinder You might want to try the following relearn sequence. I found this on another site. So I don't know if it will work for you not. But it is worth a try.

1.Turn ON the ignition, with the engine OFF.

2.Attempt to start the engine, then release the key to ON, vehicle will not start.

3.Observe the SECURITY telltale. After approximately 10 minutes, the telltale will turn OFF.

4.Turn OFF the ignition, and wait 5 seconds.

Repeat steps 1 through 4 two more times for a total of 3 cycles/30 minutes. The vehicle is now ready to relearn the Passlock Sensor Data Code and/or passwords on the next ignition switch transition from OFF to CRANK.

Important: The vehicle learns the Passlock Sensor Data Code and/or password on the next ignition switch transition from OFF to CRANK. You must turn the ignition OFF before attempting to start the vehicle.

Start the engine. The vehicle has now learned the Passlock Sensor Data Code and/or password.

With a scan tool, clear any DTCs if needed. History DTCs will self clear after 100 ignition cycles.

spunkerg · December 28, 2015

Check the starter fuse. I had the same issue, wound up blowing a fuse. It ran, changed out the ignition switch and could not get it to crank. I would up be a fuse. I was getting a 1682 code, which I thought was because of the bad ignition switch, but what I found after changing the ignition switch and still getting the error was a bare wire in the wiring harness above the emergency brake.