75gmck25
Full Access Member From Northern Virginia
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75gmck25 replied to the thread AC temp control wire.I’m not sure it’s that wire, but on my ‘75 controls there is an extra wire and two indents on the temperature slider. If you slide it... -
75gmck25 replied to the thread LED headlight upgrade.It also helps quite a bit to install a headlight relay kit that provides direct battery power to the headlights. It’s a simple plug...
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75gmck25 replied to the thread GM Delco CB Radio.Just connect a CB antenna. CB needs a good antenna that matches the frequencies, but an AM/FM radio is so simple that it could get by...
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75gmck25 replied to the thread Better illumination of gauge cluster possible?.I wasn’t sure the #168 bulbs would help that much. I decided to repaint the metal back of the cluster white, and then ordered new...
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75gmck25 replied to the thread Steering Box Screw.If you read the GM shop manual, it is definitely an adjustment point. However, there is at least one other adjustment you do before you...
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75gmck25 replied to the thread Steering Box Screw.It should have an Allen wrench fitting in the middle, and a locknut around the outside. You put the Allen wrench in to hold the...
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75gmck25 replied to the thread 1977 C20 hd emissions vacuum lines.GM didn’t put the emissions diagram and other info on the core support until sometime in the late 70’s. AFAIK, for my ‘75 the diagram...
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75gmck25 replied to the thread Deleting emissions,read this article..Rules for compliance also differ for each state. My ‘75 GMC is 8400 lbs GVW, so it’s original HD emissions equipment was minimal , and...
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75gmck25 replied to the thread Auxiliary trans oil cooler.If you buy a separate external cooler, look for a stacked plate design, not a serpentine tube if you want best cooling. Long Mfg Low...
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75gmck25 replied to the thread 1977 C20 hd emissions vacuum lines.I have a similar carburetor on my truck right now - a 17080213, so maybe you will find these pictures useful. - I use full manifold...
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75gmck25 replied to the thread CNC machined emblems.Great looking emblems! What CAD program did your student use? If you use something like SolidWorks, the initial file created is...
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75gmck25 replied to the thread 1980 C10 backfires through carb under load.Also buy a spring kit for the carburetor and try swapping to higher rated springs. Stock step-up springs on a 1406 are 5”, so the...
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75gmck25 replied to the thread Anyone use edelbrock universal EFI fuel sump Kit w 2 tanks.I have looked at using an EFI sump for my dual tanks, and the only question I have is how to handle the fuel return lines. I already...
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75gmck25 replied to the thread fuel tank swap.The tanks all interchange (although 87+ are supposed to have internal baffles for EFI), but sending units and filler pipes differ from...
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75gmck25 replied to the thread Dead battery.When you find dual batteries in a gasoline squarebody, it’s because they have the camper special package, maybe trailer towing package...
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