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Home » Public Forums » GMCnet » Vacuum Brake Lock (Are these the parts that make up the 'Vacuum Brake Lock'?)
Vacuum Brake Lock [message #311760] Mon, 02 January 2017 10:34 Go to previous message
Russell K. is currently offline  Russell K.   United States
Messages: 178
Registered: October 2016
Location: Dunedin, Florida
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Senior Member
On the list of upgrades found for our coach "Harry", there is an item called "Vacuum Brake Lock". I assume it is some type of vacuum assisted parking brake, but I cannot find another GMC that has one, or any information about it. Does anyone have experience with this system? I think the following pictures show the system.

http://www.gmcmhphotos.com/photos/data/7009/medium/What_is_this.jpg

http://www.gmcmhphotos.com/photos/data/7009/medium/zoomed_in.jpg


http://www.gmcmhphotos.com/photos/data/7009/medium/Found_this_switch_cover_in_a_box_in_the_GMC.jpg

http://www.gmcmhphotos.com/photos/data/7009/medium/Vacuum_Brake_Switch.jpg

http://www.gmcmhphotos.com/photos/data/7009/medium/Auxiliary_vacuum_booster.jpg

http://www.gmcmhphotos.com/photos/data/7009/medium/side_view_auxiliary_vacuum_booster.jpg

1978 Eleganza II, Dunedin, Florida

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