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Old 11-18-2008, 10:35 PM
Olbird Olbird is offline
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Join Date: Oct 2008
Location: Washington
Posts: 5
Default Rear Axle Differential Lock Control

I have a new just purchased 2007 GMC Topkick, the factory build sheet shows a $375.00 option Rear Axle Differential Lock.
The book show a switch on the dash but I do not have a switch on the dash, does this mean I really do not have the Rear Axle Differential Lock.

Or does it stay in the lock mode all the time.
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