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Re: 87 GMC Sierra R3500 7.4L TBI vacuum diagram
Quote:
Originally Posted by Captain J
I’ve both, the port for the auto tranx is connected,
the AC port is capped, so where does it go or connect?
Thanks
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There should be a vacuum line coming out of the firewall, just to the passenger side of the distributor. The line comes off the fitting on the manifold to a T and one side of the T connects to the line coming through the firewall, and the other connects to the vacuum reservoir (should be tucked over by the main electrical connector on the firewall).
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87 R30 CC Dually, TBI 454, NV4500, zero rust barn find
87 Jeep Grand Wagoneer, 6.5 turbodiesel, 700R4
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