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LED third brake light modification. To preface, my 1994 Z34 Lumina was driving down the road, and the third brake light trim cover fell onto the back seat. Upon a little inspection, the 3rd brake light housing was in sorry shape, and had been glued together in the past. Ordered a used light off eBay. So the factory bulbs are halogen 891 bulbs. There are a handful of sellers on Amazon that say they sell led versions of them. I was skeptical that they would fit in the housing. I had 194 led bulbs and sockets on hand, and decided to go with those. So the first thing, is to pop off the red lens, easy enough. Then use a uni-bit on a drill to open up the sockets to 5/8th inch From here, need to cut some lugs into the light housing for the 194 bulb sockets to thread into. I used a small 3 sided file. Took all of 15 mins to do. Then a little bit of wiring to do… splice wires and old connector together. Clean it up, snap the lens on it, and enjoy. This took all of 30 mins to do, with stuff I had on hand. I’m not a fan of the oddball bulbs that were in it, and glad I changed them.

Looks like a good mod to do. They use the same oddball bi-pin bulbs in the Cutlass Supreme spoiler rack as well. I would recommend using red LEDs, even behind a red lens. You'll get a better color, especially since LEDs are a cooler color than the original halogens and tend to look even more faded behind a red lens than halogens. The 194 socket will also fit larger T15 sized bulbs since they have the same wedge base. You can use 921 LED replacements for more brightness which is always a good thing with brake lights. I've tested some 921 LED replacements that are insanely bright.

They installed plugs correct for mid to late 90s 3100 engines, not the early 90s 3.1L. The symptoms fit the extra large gap. I also installed new AC Delco wires and a new O2 sensor, but I’m thinking the plugs were the problem.

Dude.... I own this car now.... Mine is exactly how your describing yours... From florida originally but Ohio car, hail damage, salvage title, center line wheels and the black hood and spoiler... Bro I have your car lol.

Hi, I’ve just stumbled onto this forum, and i figure I’ll probably need to post here eventually acquired my luminator last year, 2nd owner from a grandma. 70000 (got w 55000)miles. Here’s some pics; thx yall

HERE'S MY CAR AFTER ALL THE VISUAL UPGRADES

It's at around 151k right now, unfortunately with the frame rot probably won't make it much longer. I bought it at 135k so I had fun with it while I could.