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Re: 87 GMC Sierra R3500 7.4L TBI vacuum diagram
Quote:
Originally Posted by Captain J
Much appreciate it,
On regards to the fitting that supplies vacuum to the A/C controls and modulator on automatic transmission, should it be capped or where does go to?
Thanks
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It supplies vacuum to the modulator on the trans and the A/C controls. One port would be capped if you have a manual trans and the other would be capped if you have no AC/Heater controls.
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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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