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Re: 86 GMC Sierra Classic 2500 questions
Most aftermarket intakes don't have an egr valve. So you had one from the factory but when that intake was installed. They removed it. Also from your pictures you have an open vacuum port on the front of your carb. If I remember right, it should be hooked to your pcv valve.
"The distributor cap, wires and plugs have not been changed since I got the truck 4 years ago and I have no idea when they were changed previously. Should I go ahead and give that a try?" = YES
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87 V20, Vortec 350, Sm465, Np205, Dana 44, 14bff 4.10's
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