Ok, my batt seems to be going out. If I sit with engine off and cab lights on for 5 mins I have dead batt.

Biggest problem is the dAmn idle relearn!
What is the "Exact" procedure to do this fast and easy!
I'm tired of killing my started and steering linkage, restarting and trying to steer a dead AWD Yukon! In traffic, doing the drive for 15 mins to relearn idle!

There has to be a procedure that can be done in a parking lot or driveway.
Will a BB or wheatley tune stop this mess when my batt dies?

 

This works on my 2000.

IDLE LEARN PROCEDURE

Anytime the Powertrain Control Module (PCM) or the battery is disconnected, the PCM loses power, or the PCM is reprogrammed, the PCMs learned idle position is lost. The engine idle is unstable when the learned idle position is lost.

Perform the following procedure in order to return the learned idle to the correct position:

AUTOMATIC TRANSMISSION

Turn OFF the ignition.
Restore the PCM battery feed.
Turn OFF the A/C controls.
Set the parking brake and block the drive wheels.
Start the engine.
Ensure that the engine coolant temperature is more than 80°C (176°F) .
Shift the transmission into Drive.
Allow the engine to idle for 5 minutes .
Shift the transmission into Park.
Allow the engine to idle for 5 minutes .
Turn OFF the engine for 30 seconds .

MANUAL TRANSMISSION

Turn OFF the ignition.
Restore the PCM battery feed.
Turn OFF the A/C controls.
Set the parking brake and block the drive wheels.
Place the transmission in Neutral.
Start the engine.
Ensure that the engine coolant temperature is more than 80°C (176°F) .
Allow the engine to idle for 5 minutes .
Turn OFF the engine for 30 seconds .

 

I am assuming you changed the battery to a new one right? Our trucks do some funky stuff when there is low voltage. If you did, and you are still having problems idling, it may be a vacuum leak. What year?