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Old 12-14-2011, 11:23 AM
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'89 GMC K1500 vacuum diagram?

The heat in my '89 GMC K1500 (5.7L EFI) stopped working a while back and I've finally gotten around to looking at it. It appears that the vacuum reservoir has a line missing and I can't find a loose hose anywhere. Has anybody got a vacuum hose diagram for one of these? The sticker on the fan shroud only shows the emissions related vacuum lines, not the vacuum reservoir or the heater control valve.

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Old 12-23-2011, 08:58 AM
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public library

When I lived in Calif I used to go the the largest public library in the area. they had an automotive reference section . Do the research and then use the copier to make enlargements.
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