Tech: 88-89 GMT400 Quad Sealed Beam upgrades (Bosch T84 E-code headlights)

[eran tomer]

how are these lmc lights?
https://www.lmctruck.com/1988-98-chevy-gmc/headlight/cd-1988-89-headlight-dual

 

[Arcane]

Those are stock sealed beams. Check out these https://www.lmctruck.com/1988-98-chevy-gmc/headlight/cd-1988-98-custom-headlights-150mm

 

[eran tomer]

but they don't contain the mountings and adjusters.

 

[mars2878]

but they don't contain the mountings and adjusters.

You didn't mention what year your truck is nor what your intent was.

Does your truck have the mini-quad headlights?
If no, then we now know that you are looking to do a conversion.
This leaves you w/ 2 options:
A: Your link: You will need the complete assemblies & the pigtails as they are specific to this headlight style. The bulbs themselves in the link that you gave, are essentially stock bulbs. They're ok. Def better than yellowed/dull plastic halogen housings.
B: The link that Arcane provided: will give you the 88-89 appearance but will use the stock halogen style bulbs & wiring. So you will need to procure the 88-89 mini-quad assemblies along w/ the LMC housings.

If your truck currently has Mini-quad headlights, then you have 2 options.
A: use the stock bulbs or find better brightness bulbs that use the same plug.
B: get the housings in the provided LMC link along w/ the halogen pigtails (splice them in) & a good set of bulbs.


I wish these housings were available 10yrs ago. I custom made my harness & use the stock 89 bulbs on my 99 Burban. I'll be ordering these as soon as I find an Escalade/Denali/Z71 harness to swap in place.

 

[eran tomer]

thanks. i got now the composite headlamps, with an lmc grille conversion

you say that the lmc custom headlights use the composite pigtails, and that you can replace the actual bulbs alone?

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[mars2878]

thanks. i got now the composite headlamps, with an lmc grille conversion

you say that the lmc custom headlights use the composite pigtails, and that you can replace the actual bulbs alone?

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Correct, the LMC housings give the visual appearance of the 88-89 mini-quad headlights, but work like the halogen style w/ replaceable bulbs. Which in turn will give superior lighting over both styles & because they are a glass unit, they wont dull/yellow like the halogen units.

 

[eran tomer]

Do they come with the adjusters and springs?

 

[mars2878]

Do they come with the adjusters and springs?

In the link provided by Arcane, that link is only for the mini-quad style glass headlight housings that feature replaceable bulbs.

You will still need to find someone who is selling the stock assemblies & clean them up, install on your truck, then swap the LMC housings in & enjoy. Or pay more money to LMC for brand new mounting brackets.

 

[PlayingWithTBI]

In the link provided by Arcane, that link is only for the mini-quad style glass headlight housings that feature replaceable bulbs.

Unfortunately they're on back order. I think they've been for some time now.

 

[mars2878]

Unfortunately they're on back order. I think they've been for some time now.

hopefully they'll be available soon. I had bought the larger size years ago from them for my 89 S-Blazer that I had @ the time. They worked & looked great. I had even gotten the HD harness that LMC sells. They were even on backorder then.