Thread: Gauge cluster
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Old 01-27-2015, 08:05 PM   #2
ray_mcavoy
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Join Date: Nov 2009
Location: Sherman, ME
Posts: 2,373
Re: Gauge cluster

Like SS Tim said in this post --> http://67-72chevytrucks.com/vboard/s...d.php?t=558552 the vacuum gauge was used in medium duty trucks with Hydrovac brake boosters.

And as also discussed in that thread, a vacuum gauge can be used as a fuel economy gauge but the size and placement of the factory gauge isn't well suited for that purpose.
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