Roof marker lights, very uncommon??
 

I've been searching for a few months now for a 3/4 ton truck project, and really the only stipulations I have are that I want rear coil springs and factory roof marker lights.

That said, it seems like NONE of the 3/4 tons have marker lights. Are they really that uncommon?? I see them on 1/2 tons every now and again (my K10 has them), but almost never 3/4 tons.

Re: Roof marker lights, very uncommon??
 

Yes, very uncommon. 70 1/2 ton

Re: Roof marker lights, very uncommon??
 

Cab lights weren't a popular option back in the day. I personally yhink they're very cool

Re: Roof marker lights, very uncommon??
 

Just about as cool as cool can be, along w/PS, PB, AC, tach, 402, AM/FM, posi and bucket seats...and 5 different colored body panels!!!

Re: Roof marker lights, very uncommon??
 

I'm in that multicolored truck club! :lol:
...non-factory cab lights on this one.

Re: Roof marker lights, very uncommon??
 

There's a thread out there somewhere about this. And more than one instance of guys buying matching colored body panels and putting them all back on the truck and now it's all one color w/out having to pay a painter. I have since put on a matching red bed.

Re: Roof marker lights, very uncommon??
 

I have a 71 1 ton cab roof with the factory raised panel cab lights. if you want to make your own cab with cab lights.

Re: Roof marker lights, very uncommon??
 

I was the only guy in high school who had cab lights. It was cool because everyone knew it was me coming down the road. I say to each his own. It's cool if you dig it! :metal:

Re: Roof marker lights, very uncommon??
 

Boy you can say that again!
Early on in my truck addiction days I made the mistake of building this short step side with a Cheyenne Super cab with the lights. I had if for sale for over 6 months with the price dropping constantly, I couldn't give that truck away!
I ended up trading it off for a Plasma cutter and was happy to do so.

Re: Roof marker lights, very uncommon??
 

I have 4 K20's now and 2 have factory cab marker lights. Seem to be more common on the 4x4's and C30's in my experience.

Re: Roof marker lights, very uncommon??
 

Very Cool!

:metal:

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Re: Roof marker lights, very uncommon??
 

I love em. I actually like the raised bump on the cab versions. If any one local had one for sale at a reasonable price I would buy it to graft on to a cab (well I would have to have it done, I would destroy a perfectly good cab if I tried it myself lol).

I wonder if the gaskets are available. I think you can still get the round lights from GM

Re: Roof marker lights, very uncommon??
 

I think cab lights would be nice, kind of a less than silly form of "day time running lights."

I don't think I'll put those onto my truck though.....maybe the next truck I get.

Re: Roof marker lights, very uncommon??
 

That is tempting, I am not interested in cab swapping a truck but I would certainly be down for a roof skin swap

I honestly don't like the way these trucks look without them :lol:

From what I know, they were standard on C30 trucks '69+, per federal law. And yes, they do seem much more common on 4x4 trucks.

The "fireman's hat" style lens was introduced midway through 1970 model year production (January 1st, 1970) and was used by GM until 1991 on the square body trucks. They are still available both from GM and most local NAPAs can get them at a decent price. I installed a set on my '71 C10, non-original so no roof bumps, I think they were $15 each.

Re: Roof marker lights, very uncommon??
 

I put the factory clearance lamps on a standard roof panel before. It worked out great and looked just as good.

Re: Roof marker lights, very uncommon??
 

Two 3/4 ton 4x4's I've owned had them, I would think that the 1/2 ton's would be more rare?

Re: Roof marker lights, very uncommon??
 

This is my belief as well.

Re: Roof marker lights, very uncommon??
 

I love that GMC!!

I've confirmed two 4x4 1/2 tons via SPID to be factory original cab lights, my '69 (SPID below) and a '70 I once went and looked at (and wish I had bought!), but those are the only ones I know of for sure.

Seems many of the other cabs I've seen with the raised pad roof started out life as C30s.

Re: Roof marker lights, very uncommon??
 

I really like those five factory lights on top of the cab. Just sold a 72 C30 Mohome and a 72 GMC 3500 utility body with big welder - hated to see those cab lights go. Way cool in my book.

Many C 30s came with them - other than that the lights seemed to be a special order option. The factory cab with the "fire hat" type lens actually has 5 raised/flat mounting sites on the roof, so it was a different roof metal stamping. Still have two or three.

Re: Roof marker lights, very uncommon??
 

From the factory less than 10% had them. By 1980 I think about 50% seemed to! Most were aftermarket, Yankee77 style (or whatever they're called).

Re: Roof marker lights, very uncommon??
 

The tear drop Yankee 77 lights were factory from 60? to 68.
69-70 were round hockey puck designed, can't remember if they had raised pads in truck roof.
71-72 were fire hat design with raised pads in truck roof.

Not all C-30 trucks had clearance lights.

Re: Roof marker lights, very uncommon??
 

I have a 70 K20 with the raised pads in the roof.

I think it was a requirement after a certain year for dually's. I can point to a couple 71/72 C30 SRW's that don't have cablights.

Re: Roof marker lights, very uncommon??
 

Raised pads started in '69, my K10 is a Dec '68 build date and it has them.

Hadn't thought about SRW C30, that's a good point!

Re: Roof marker lights, very uncommon??
 

Yep, my 68 C-30 SRW doesn't have marker lights. The 68 replacement cab I have does :metal:

Re: Roof marker lights, very uncommon??
 

Funny thing was they were a $29.00 option and it required a totally different cab. GM was taking a hit on that option.

Re: Roof marker lights, very uncommon??
 

71 k10. ordered that way. They make the truck look more trucky :lol: Its on the SPID but cant seem to get the image over here.

Re: Roof marker lights, very uncommon??
 

That is sweet!

I didn't really mean for this to turn into a picture thread, but it's full of marker lighted awesome :metal:

Re: Roof marker lights, very uncommon??
 

when I first got my truck I never really cared for the lights but after I did my research and saw other trucks with out them the cab lights then became one of my favorite features

Re: Roof marker lights, very uncommon??
 

:chevy:

Re: Roof marker lights, very uncommon??
 

Pitch black

Re: Roof marker lights, very uncommon??
 

I would submit that a 3/4 ton WITH cab lights and WITH coils is something you'll spend a lifetime looking for. A Cheyenne Super with that combo was for sale a little while back - was a Custom Camper also. I'm assuming it's gone by now. Look back a few pages in the CL ads thread to find out if you want. She was a little off.... But the truck was nice - I DIDN'T buy it specifically because it was a coil spring truck. Didn't want that in a custom camper 3/4 that I planned to someday put a camper on. It was a good price too, if I recall. Needed a little work, but not bad at all. Might I ask why you prefer coils on a 3/4 ton? In my experience, I actually (and surprisingly) like the ride better in my leaf trucks.

Re: Roof marker lights, very uncommon??
 

Looks great. That little raised portion really ads to the look for me.

Re: Roof marker lights, very uncommon??
 

That figures :lol:

I've had both leaf and coil trucks now in a variety of spring rates, and I've found for the given weight carrying capacity that the coil trucks feel more planted to me. I'm totally in agreement, if I were towing or carrying high loads like hay or something, I would want leafs out back, but just for general haulage and towing I prefer the way the coil springs behave.

I'm chalking it up to personal preference!

Re: Roof marker lights, very uncommon??
 

ICC required the clearance lamps at over 10,000#, which was the dual rear C/30s. I think the law began prior to '69, but the 67/68s were to be upfitted. The law would have come along once the '67 design was in motion

Re: Roof marker lights, very uncommon??
 

Michigan Truck Spring $38.00 shipped. Part #VSM1313A

Re: Roof marker lights, very uncommon??
 

As far as I know, those lights won't fit on a cab without the pads. When I did my '71, I used these lights:
http://www.truck-lite.com/webapp/wcs...8601&langId=-1

Which have the bulb up inside the base instead of sticking down into the roof (visible here)
http://67-72chevytrucks.com/vboard/s...11&postcount=2

Re: Roof marker lights, very uncommon??
 

I've got pads, just thought I'd share a cheap source to grab some.

Re: Roof marker lights, very uncommon??
 

They are required by law on certain vehicles. Anyway, you always see them on medium and heavy trucks. Many times see them on light duty trucks, such as 1 ton duallys.

Conversely, it is not illegal to add them to other trucks. I believe cab lights were a free-flow Regular Production Option or perhaps an Accessory Option. Some people just liked it and ordered them. If you see fewer on 3/4 tons it is just a coincidence.

Re: Roof marker lights, very uncommon??
 

I was under the impression that marker lights weren't required until you were over 79.8" in width. Is there a height trigger as well? Or why would a non-dually C30 require it while a C20 wouldn't? That doesn't make a lot of sense at first blush.

Re: Roof marker lights, very uncommon??
 

The 5 lights are actually required due to two separate requirements, both of which are directly related to width. The two outside lights are "clearance lamps", while the 3 in the middle are "identification lamps". To be placed as high as practical. 80 inches is the cutoff if I remember correctly. Like mentioned above, you can have them on any vehicle.

My 1/2 ton Ford (I know, I know) has to have them because of having extra width.