I thought i read before that there is a way to do this but i cant find it now. Does anyone know how to do this? Thanks

 

To lock the rear axle, do the following:

1. Place the transfer case in the Four-Wheel-Low
Lock mode. This is the only mode which will
allow the rear axle to lock. See Full-Time
Four-Wheel Drive on page 128 for more
information regarding the transfer case and
Four-Wheel-Low-Lock mode.

2. Press the button with the vehicle stopped or
moving less than 2 mph (3 km/h).
You must wait for the light in the button to stop
flashing and remain illuminated before the
rear axle is locked.

 

He obviously knows the stock functions....

Yes there is a way. I think the thread is called rear locker bypass. On another forum someone just posted up that they did the bypass but didn't say how they did it. If I can find the thread I'll let you know. If I had to guess it would involve sending 12 volts direct to the locker.

 

thanks for the replies. Atvspeed4, if you happen to find this info would like to know how to do it. 4hi in th sanddunes works much better.

 

Here is one link:

Hummer X Forum • View topic - Rear Locker

I think there is another way too