75gmck25's latest activity
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75gmck25 replied to the thread Heat and AC.Why don't you try downloading this repair manual and taking a look through the PDF document. This is part of the reference library on... -
75gmck25 replied to the thread Replacing K20 fuel tank.I deopped my tanks a few years ago to replace the sending units. It was a PiA, but with a nearly empty tank I could put a 2x8 under it...
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75gmck25 replied to the thread Oil Pressure and Temp.Also check the gauge panel ground. It’s a black wire grounded to a post on the emergency brake mechanism. Gauge panel wiring uses a...
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75gmck25 replied to the thread FUEL TANK CAPACITY 1982 K10 4x4.The older tanks are not baffled, so how low on fuel you can go may depend on the angle of the truck and whether you are turning a...
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75gmck25 replied to the thread Manifold and ported vacuum.Your description, and the use of the terms fast idle and normal idle, are confusing. Now that I think of it, let's simplify your setup...
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75gmck25 replied to the thread Dual tank install.The wiring and switching valves changed over the years, so your best bet is to find a donor truck of a similar year and swap everything...
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75gmck25 replied to the thread Blend Door Panel.The blend door is inside the plenum, behind the glove box. Do you mean the door in the kick panel for the max cooling / recirculate...
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75gmck25 replied to the thread Manifold and ported vacuum.I have aluminum heads and I run manifold vacuum with 15 degrees base timing and 20 degrees mechanical (in by 2000 rpm). My vacuum...
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75gmck25 replied to the thread Stock Cold air intake performance upgrades.You have the tall air filter, which flows plenty for any SBC. Most trucks (like mine) have the standard height filter. Dual snorkel...
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75gmck25 replied to the thread 84 K10 full exhaust replacement.If you ever swap to aftermarket heads, watch out for brands that use a 1/2” higher exhaust port, and different spacing on the spark...
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75gmck25 replied to the thread 14 bolt brake cleanup.When I had my ‘75 14 bolt FF rehabbed by a local shop many years ago (2003?), the shop manager said he had to buy multiple brake parts...
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75gmck25 replied to the thread AC Troubleshooting 1976 GMC C15.My condenser is right up against the radiator, with only some thinstrips of rubber cushioning between them. I am using the stock 7 blade...
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75gmck25 replied to the thread AC Troubleshooting 1976 GMC C15.Where is your orifice valve located? On my ‘75 the metal tube coming out of the bottom of the evaporator has a fitting large enough to...
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75gmck25 replied to the thread which bench seat is best? 75? 80? 81?.I installed new seat foam and velour upholstery on my ‘75 a couple of months ago. Found one broken spring on the drivers side and had...
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75gmck25 replied to the thread 84 K10 full exhaust replacement.On my ‘75 the NP203 transfer case support has lots of exhaust space on one side and much more limited on the other. Had to carefully...
