heat and a/c - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**Boog** · 12-23-2022, 10:28 PM

Are all those buttons supposed to be backlit. It would make sense to me if they are but a couple of mine in the 91 are not. The defrost/floor button, floor/face button, fan speed button and system on/off buttons are out.
Replaceable bulbs?

**pjmoreland** · 12-23-2022, 11:08 PM

All of the buttons should be illuminated. There are three super tiny bulbs on the back of the board. Not sure what size they are.

Just call me Sean · 12-24-2022, 12:36 AM

That's cool. Now I'll have to fix mine.

**Boog** · 12-24-2022, 06:00 AM

Super. I can fix it. Thank you.

**special-K** · 12-24-2022, 09:45 AM

I miss that dash. Missed it by one year in my '95, only to get the complications involved.

**Hart_Rod** · 12-30-2022, 10:15 AM

Where do you get the bulbs?

**pjmoreland** · 12-30-2022, 12:56 PM

I'm not sure, but some searching indicates they are T4.2 Neo Wedge bulbs.

https://www.gmt400.com/threads/led-b...control.51932/

The T4.2 Neo Wedge appears to have a 10mm base.

https://www.amazon.com/Jtech-Wedge-W..._1672419315575

Here's a bulb kit on eBay that says it's specifically for 88-94 Chevy trucks, and it lists the bulbs as 10mm.

https://www.ebay.com/itm/174654851358

**Boog** · 01-03-2023, 12:59 AM

Well, I never imagined there would ever be so many instrument panel bulbs available. I did check around town and no one carries the original bulbs. Everything is LED in a variety of colors and crap.
I did see where GM stockers are said to be $15 a piece! Nevermind those. I don't do business with our local dealer.
I did find some on ebay coming out of Tn in a few days. $18.95 for the 3.
And age is taking it's toll on the dash plastic also. The hvac control panel right side mounting ear is broken off. I epoxied it together to brace it up on the right side. The control panel is not available through O'Reillys so I don't imagine it is elsewhere either. Unless one of you know where to get one?

**Boog** · 01-06-2023, 06:57 AM

I received my 3 new stock type bulbs and installed them yesterday. They are correct and for $20. Nice to be able to see the buttons in the dark again.

**special-K** · 01-06-2023, 07:57 AM

Bulbs sure have gone up. I always bought the old mini-bulbs by the box or 6 or more. Can't imagine paying $40 (or more) for a small box of light bulbs... sheesh

12-23-2022, 10:28 PM	#1
Boog laying low Join Date: Mar 2001 Location: Searcy, Ark. USA Posts: 12,957	heat and a/c Are all those buttons supposed to be backlit. It would make sense to me if they are but a couple of mine in the 91 are not. The defrost/floor button, floor/face button, fan speed button and system on/off buttons are out. Replaceable bulbs? __________________ Boog 69 Chevy stepside, 358/T350, 4.11 posi, 4.5/4 drop, rallys, poboy driver primer is finer 91 Chevy sportside, Tahoe, Yukon & GMC Crewcab All GM..'nuff said. I stand for the flag and kneel at the cross

12-23-2022, 11:08 PM	#2
pjmoreland Senior Member Join Date: Jan 2005 Location: CA Posts: 5,329	Re: heat and a/c All of the buttons should be illuminated. There are three super tiny bulbs on the back of the board. Not sure what size they are. Attached Images

12-24-2022, 06:00 AM	#4
Boog laying low Join Date: Mar 2001 Location: Searcy, Ark. USA Posts: 12,957	Re: heat and a/c Super. I can fix it. Thank you. __________________ Boog 69 Chevy stepside, 358/T350, 4.11 posi, 4.5/4 drop, rallys, poboy driver primer is finer 91 Chevy sportside, Tahoe, Yukon & GMC Crewcab All GM..'nuff said. I stand for the flag and kneel at the cross

12-24-2022, 09:45 AM	#5
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,863	Re: heat and a/c I miss that dash. Missed it by one year in my '95, only to get the complications involved. __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~

12-30-2022, 10:15 AM	#6
Hart_Rod ************* Join Date: Apr 2005 Location: Pensacola, FL Posts: 17,827	Re: heat and a/c Where do you get the bulbs? __________________ Rob - https://www.instagram.com/hart_rod_c10 As Iron Sharpens Iron, So One Man Sharpens Another. Proverbs 27:17 FOR SALE: DBW pedal bracket - http://67-72chevytrucks.com/vboard/s...d.php?t=651123 FOR SALE: Hood Brackets http://67-72chevytrucks.com/vboard/s...d.php?t=679945 1987 Silverado SWB - 34.5K original miles http://67-72chevytrucks.com/vboard/s...d.php?t=801834 1969 SuperBurb - http://67-72chevytrucks.com/vboard/s...d.php?t=200387 1968 Farm truck - http://67-72chevytrucks.com/vboard/s...d.php?t=358692 1968 SWB - http://67-72chevytrucks.com/vboard/s...d.php?t=551258 1948 Chevy - http://67-72chevytrucks.com/vboard/s...=122164&page=3

12-30-2022, 12:56 PM	#7
pjmoreland Senior Member Join Date: Jan 2005 Location: CA Posts: 5,329	Re: heat and a/c I'm not sure, but some searching indicates they are T4.2 Neo Wedge bulbs. https://www.gmt400.com/threads/led-b...control.51932/ The T4.2 Neo Wedge appears to have a 10mm base. https://www.amazon.com/Jtech-Wedge-W..._1672419315575 Here's a bulb kit on eBay that says it's specifically for 88-94 Chevy trucks, and it lists the bulbs as 10mm. https://www.ebay.com/itm/174654851358 Attached Images Last edited by pjmoreland; 12-30-2022 at 01:09 PM.

01-03-2023, 12:59 AM	#8
Boog laying low Join Date: Mar 2001 Location: Searcy, Ark. USA Posts: 12,957	Re: heat and a/c Well, I never imagined there would ever be so many instrument panel bulbs available. I did check around town and no one carries the original bulbs. Everything is LED in a variety of colors and crap. I did see where GM stockers are said to be $15 a piece! Nevermind those. I don't do business with our local dealer. I did find some on ebay coming out of Tn in a few days. $18.95 for the 3. And age is taking it's toll on the dash plastic also. The hvac control panel right side mounting ear is broken off. I epoxied it together to brace it up on the right side. The control panel is not available through O'Reillys so I don't imagine it is elsewhere either. Unless one of you know where to get one? __________________ Boog 69 Chevy stepside, 358/T350, 4.11 posi, 4.5/4 drop, rallys, poboy driver primer is finer 91 Chevy sportside, Tahoe, Yukon & GMC Crewcab All GM..'nuff said. I stand for the flag and kneel at the cross

01-06-2023, 06:57 AM	#9
Boog laying low Join Date: Mar 2001 Location: Searcy, Ark. USA Posts: 12,957	Re: heat and a/c I received my 3 new stock type bulbs and installed them yesterday. They are correct and for $20. Nice to be able to see the buttons in the dark again. __________________ Boog 69 Chevy stepside, 358/T350, 4.11 posi, 4.5/4 drop, rallys, poboy driver primer is finer 91 Chevy sportside, Tahoe, Yukon & GMC Crewcab All GM..'nuff said. I stand for the flag and kneel at the cross

01-06-2023, 07:57 AM	#10
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,863	Re: heat and a/c Bulbs sure have gone up. I always bought the old mini-bulbs by the box or 6 or more. Can't imagine paying $40 (or more) for a small box of light bulbs... sheesh __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~



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