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75gmck25's latest activity
75gmck25
replied to the thread
New to this forum and looking for best options for a new radiator
.
I purchased a Champion all aluminum radiator from Jegs several years ago for my ‘75 K25 and it provides excellent cooling. It does not...
Mar 3, 2023
75gmck25
replied to the thread
rear A/C lines for 1978 Suburban K20
.
If you find an experienced shop, making A/C hoses is a quick job, although more expensive now because barrier hose prices have gone up...
Mar 2, 2023
75gmck25
replied to the thread
rear A/C lines for 1978 Suburban K20
.
Duplicate post
Mar 2, 2023
75gmck25
replied to the thread
Alternator not charging at idle
.
Did your truck have a factory voltage gauge, or was it an ammeter gauge? Or maybe the cluster has been swapped. The wire on the...
Feb 26, 2023
75gmck25
replied to the thread
Lights are all wonky
.
Very important - If you didn’t reinstall the cluster ground wire you will never get the instrument panel to work properly. Every gauge...
Feb 24, 2023
75gmck25
replied to the thread
How do I use the tank selector on 1973 Camper Special
.
My ‘75 K25 camper special with a 350 has a factory metal fuel return line. I have HD cooling with A/C, and the camper special...
Feb 21, 2023
75gmck25
replied to the thread
Lights are all wonky
.
You said you checked the instrument panel circuit board, so I guess you took the cluster out. Did you ensure the cluster ground was...
Feb 21, 2023
75gmck25
replied to the thread
How do I use the tank selector on 1973 Camper Special
.
Arroyo083 - I think you missed the point of the 3 vs. 6 port solenoid, and how it fits with a fuel return line. - two port fuel pump...
Feb 20, 2023
75gmck25
replied to the thread
How do I use the tank selector on 1973 Camper Special
.
If you have a fuel pump with a return line, and the fuel solenoid/switch only has 3 ports, you can’t switch both fuel feed and return...
Feb 20, 2023
75gmck25
replied to the thread
82 K10 Heater Doors and Vacuum Lines
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The vacuum ball under the hood has one side connected to engine vacuum, and the other side has a hose running to the heater controls...
Feb 19, 2023
75gmck25
replied to the thread
Calibrating speedometer.
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I’ve never changed one myself, but aren’t the gears color coded so it’s easier to tell which one you have?
Feb 18, 2023
75gmck25
replied to the thread
Fan Clutch
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My ‘75 GMC with A/C has a fan clutch and 7 blade fan, and a stock design water pump, the spacing works out fine. There are no spacers...
Feb 17, 2023
75gmck25
replied to the thread
Good LED replacement for Dash Instrument Socket and Bulb ; 5/8" ; Bayonet-Style?
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I used bulbs from superbright leds and it came out very nice, and the dimming function works fine. I’d have to look for the receipt to...
Feb 15, 2023
75gmck25
replied to the thread
Header fitment and exhaust routing with NP203
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That 2nd picture is exactly what I needed. It looks like there isn’t much room for any type of adapter (ball and socket, etc) on the...
Feb 14, 2023
75gmck25
replied to the thread
Charcoal Canister 90 Suburban
.
On the older trucks the vent line to the tank is connected to an open port on the sending unit, and you can’t get it to hold vacuum if...
Feb 14, 2023
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