Recent Posts

1

Welcome / Re: Hi!

« Last post by Shifty on Today at 12:39:12 pm »

Fine looking GMC!  Love the wheels, and welcome from Tucson AZ!

2

Welcome / Re: Hi!

« Last post by bd on Today at 08:51:09 am »

Hello and welcome from California.  Nice truck!  Looks proud and right at home.  It should prove a worthy project.

3

Welcome / Hi!

« Last post by 1980BBT on Today at 07:36:21 am »

Just joined. Looking forward to browsing, learning, posting, and buying essential supplies 

Inherited a 1980 GMC Sierra Classic 25. Will someday detail it's current status and future plans. Right now, we'll just say that "She may not look like much, but she's got it where it counts, kid."

4

General Discussion / Re: Some cool old cars

« Last post by jeremy.farlow on April 23, 2026, 08:14:25 pm »

This beauty is sitting out in front of a Chevrolet dealership just up the road from my shop:



They also have a K-20 in similar shape sitting out front.




Be safe



Jeremy

5

Engine/Drivetrain / Re: Motor Mounts

« Last post by VileZambonie on April 18, 2026, 06:41:13 pm »

I just did a set of C10 motor mounts today and had to use my home made wrench. Tech Tip, wrap the flange nut in dum dum (butyl tape) and it will not fall out.

6

Heating, Ventilation & Air Conditioning (HVAC) / Re: Noisy AC Compressor

« Last post by Shifty on April 17, 2026, 10:03:57 am »

Most excellent!  Enjoy the cool breeze! 

7

Electrical / Re: Door switch for courtesy lights on 1974 c10

« Last post by fiddler on April 16, 2026, 08:10:07 pm »

I have the correct switch and some bullet terminals coming.  I get now what you are driving at.  It is indeed a self adjusting switch!  Clever those americans!!

8

Electrical / Re: Door switch for courtesy lights on 1974 c10

« Last post by bd on April 16, 2026, 05:51:51 pm »

Yes, the OEM switch used a bullet terminal.  And, I agree, it sounds like the switch was replaced with a newer design configured for two spade terminals.

9

Electrical / Re: Door switch for courtesy lights on 1974 c10

« Last post by bd on April 16, 2026, 05:48:46 pm »

Maybe I'm not duplicating your question or the problem.  Look at the attached image.  The sleeve (or barrel) is snug, but slides axially through the hex nut.  When the door initially closes on a new switch, the door presses against the plunger, the mushroom head of the plunger presses against the end of the sleeve, pushing the sleeve through the nut into a new position that sets the plunger height, allowing the plunger to slide in and out according to whether the door is closed or open.

10

Electrical / Re: Door switch for courtesy lights on 1974 c10

« Last post by fiddler on April 16, 2026, 05:44:01 pm »

OK after tons of research I now suspect the old switch has been modified to work.  It is not the correct switch that is called for on all of the vendors I find.  The switch is probably a newer model switch cannibalized from a junk yard and the barrel cut down to fit.  The connector has been changed.  Remember this truck is a hybrid of years.  I am going to try the original switch from   trucks for the 1974 year.  I originally ordered by how the switch looked as I can't depend on the year of the title for parts with this truck.  I suspect the original plug was removed and a spade put on the wire to make with a later model modified switch.  (use what you have or junk yards are cheaper or??)  Anyway, I will try to find a connector for the new switch and get that on the end of the wire.  Looks to be a bullet as opposed to a spade.   Thanks for any responses.....