SERVICE AIR SUSPENSION????????

[hummerNCO]

<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by Dug3x3:
And what really pissed me off is the locking rearend comes out at 20mph. WTF! Does anyone know how to make the rear locker stay in at unlimited speed? </div></BLOCKQUOTE>

The locker is not supposed to stay engaged at speeds above 20 MPH.

When I purchased my truck it came with a handy little yellow book that described its attributes and features. You can find a copy of it here:

details

"The locking rear axle will be disabled when the
vehicle’s wheel speed is greater than 20 mph (32 km/h),
if the vehicle’s battery is low and/or the transfer case is
shifted out of 4LO Lock."