Instrument panel different size bulb holders? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

tucsonjwt · 03-03-2019, 10:54 PM

I am putting my instrument panel back together after some interior painting and I come up with one bulb holder that is different in size than the other bulb holders.

I have 11 bulb holders and 11 holes in the printed circuit for bulb holders, but one of the 11 holders is smaller than the others. I see no difference in the holes in the printed circuit or backing plate. Did I somehow get a wrong bulb holder installed in the panel by a previous owner?

Also, the bulb holders I see in the LMC catalog (36-0190) are shown for LED bulbs. Will that part number also work for conventional bulbs?

I am attaching pics to show the difference in bulb holder size. The configuration of the small bulb holder seems to be the same, but it just slips through the hole in the backing plate.

I do have the special bulb holder for the fiber optic line, so that is not an issue relating to this problem (I think.)

fordguy40 · 03-03-2019, 11:22 PM

Just r&r'd the cluster....all the bulb holders were the same size.

kipps · 03-04-2019, 12:54 AM

I have a '87 cluster with one size, and a '91 suburban cluster with the other size. I don't recall which one is which.

I intend to use the '91 cluster(with electronic speedo), but all my bulb holders don't fit it.

Am also interested in any answers to what's going on here.

**Wgesnerjr** · 03-04-2019, 06:36 AM

Quote:

Originally Posted by kipps

I have a '87 cluster with one size, and a '91 suburban cluster with the other size. I don't recall which one is which.

I intend to use the '91 cluster(with electronic speedo), but all my bulb holders don't fit it.

Am also interested in any answers to what's going on here.

I have swapped in a 91 cluster and the sockets are smaller than the 85 cluster had originally. So there must have been a change between 85 and 91. But i think they use the same bulb size.

Went to the junk yard and got a handful of each size. Then I just matched the socket to the size of the hole.

Pontiac1976 · 03-13-2019, 12:06 AM

That one not form 73-90 Chev/GMC cluster. I be leave it's from car of late 80' early 90's

03-03-2019, 10:54 PM	#1
tucsonjwt Registered User Join Date: Jul 2007 Location: Tucson, AZ Posts: 3,189	Instrument panel different size bulb holders? I am putting my instrument panel back together after some interior painting and I come up with one bulb holder that is different in size than the other bulb holders. I have 11 bulb holders and 11 holes in the printed circuit for bulb holders, but one of the 11 holders is smaller than the others. I see no difference in the holes in the printed circuit or backing plate. Did I somehow get a wrong bulb holder installed in the panel by a previous owner? Also, the bulb holders I see in the LMC catalog (36-0190) are shown for LED bulbs. Will that part number also work for conventional bulbs? I am attaching pics to show the difference in bulb holder size. The configuration of the small bulb holder seems to be the same, but it just slips through the hole in the backing plate. I do have the special bulb holder for the fiber optic line, so that is not an issue relating to this problem (I think.) Attached Images

03-03-2019, 11:22 PM	#2
fordguy40 Registered User Join Date: Feb 2018 Location: Montclair, CA Posts: 149	Re: Instrument panel different size bulb holders? Just r&r'd the cluster....all the bulb holders were the same size. __________________ A few Fords and a couple of Chevys

03-04-2019, 12:54 AM	#3
kipps Registered User Join Date: Jul 2014 Location: North-central Virginia Posts: 1,104	Re: Instrument panel different size bulb holders? I have a '87 cluster with one size, and a '91 suburban cluster with the other size. I don't recall which one is which. I intend to use the '91 cluster(with electronic speedo), but all my bulb holders don't fit it. Am also interested in any answers to what's going on here.

03-13-2019, 12:06 AM	#5
Pontiac1976 Registered User Join Date: Oct 2015 Location: Ottawa, Ontario, Canada Posts: 766	Re: Instrument panel different size bulb holders? That one not form 73-90 Chev/GMC cluster. I be leave it's from car of late 80' early 90's __________________ 1977 REG cab Long Bed with a 1984 Front Clip, 82 305 .60 over 9.0.1 flat top pistons, 4bbl, TH350, w/84 SS-intake & cam , w/ 1977 big block rad, 1975 gear box, 1984 master w/ metric fittings top & SAE fitting @ portion block, 1975 3.42 gear open diff. Duel 77-87 Factory air cleaner, duel inlet from rad support . Down sized 9' to new 8' Steel flat bed Was a 77 454 w/308 gear. Taken out 550 lbs. up front with motor clip change.



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