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    Cruise Control Release Switch

    My cruise control release switch went bad a few months ago and I replaced with a different style which was the only thing available and it didn't last at all. The switch that was on the truck was a black GM style with only a vacuum line connection. GM part #407437. The only thing available at...
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    No power at highway speeds

    At my wits end. 1987 1500 305 TBI engine. A few months ago, the ICM went bad. I screwed up and broke the connector inside the distributor so I ended up replacing the whole distributor. The problem the truck is having now is that it runs great speeds in town, but I've lost all power at highway...
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    Cruise Control Servo

    Trying to rebuild the cruise servo on my 87 TBI engine. The sandpaper looking stuff that wraps around the magnetic wire just disintegrates with the slightest touch. What is this material and what would be a good substitute? And what are you all using for the filter material below the plunger?
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    Oil in throttle body

    This is the amount of oil in the back of the tbi throttle body after a little over 100 miles. New PCV valve and all cylinders have 150 psi compression except for cylinder 1 has around 130. Any ideas? Can I delete this hose from the driver's side valve cover and just put in a breather or maybe...
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    Front rotor question

    1987 GMC R1500 long bed with 305. I have the JB5 code in the glove box for the bigger brakes but when the front rotors came in, the inner bearings are bigger than what came off the truck. Outer bearing and seal are same size. It appears the smaller rotors for the 2” rear shoes are the size...
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    Help identifying under dash connector

    Can anyone advise what this connector is for? It’s under dash near steering column. I have an 87 GMC with TH400 and someone did away with kickdown switch all together. So I’m trying to wire in a new one and found this connector under the dash but it’s spade terminals point a different...
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    Vent Door

    Can anyone advise what control setting is supposed to open the door at the bottom passenger kickpanel on a 87 GMC? It doesn't seem to open on any setting. I have A/C, but it is currently inoperable.
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    Headlights?

    87 GMC with the quad headlights. Driver's side top light goes out when brights activated. It works fine on low beam. I've replaced the light and verified it's the right bulb cause it's the same as on the passenger side. Any ideas?
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    Kickdown switch

    I just bought an 87 GMC 1500 with a 305 and TH400. Doing general tune-up and fluid changes the other day and I noticed a single terminal switch on driver’s side of tranny. After exploring this forum I’ve determined it to be a kickdown switch. However there’s no wiring or even the switch attached...

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