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I'm doing SCIENCE!
486 Posts
Discussion Starter · #1 ·
The community here at urges you to please use caution and seek professional assistance when performing modifications to your vehicle. Before attempting any modification it is advised that you refer to your Colorado or Canyon service manual or contact a certified mechanic as not all GMT355 trucks are the same. The views expressed in this 'product review' is the opinions of the author alone. The posts and content presented on this site reflect in no way the views of or it’s ownership.

A 355nation product review presented by

SuperModulation 3157 LEDs

Borrowed from PureNoSideHate, thanks!

Product Description
3157 LED bulbs


Void warranty?
No. Please see "Magnus Moss"

Reviewer's Vehicle
Make: Chevrolet
Model: Colorado
Year: 2012
Engine: 5.3L
Power windows: Yes
Sun Roof: No

Product Analysis
SuperModulation LEDs for the tail lights, made with the same attention to detail as everything else SuperModulation does.

Installation Analysis
Installation was pretty straight forward, I recommend having the lights turned on when you install the bulbs, as installing them backwards will result in them not lighting up. If the lights are on, it's much easier to catch then finding out later that half of them are backwards after reassembling everything.

Overall Opinion
I got these LEDs to replace a set of SuperBrightLEDs (45-LED) bulbs that I've had since the last truck. I wasn't horribly impressed with the SuperBrightLEDs fit-and-finish and, since I wanted to tint my tails, was looking for something a bit brighter.

Overall, the SuperModulation bulbs are of a higher assembly quality and are a bit brighter in running light mode, which is impressive as they have less LEDs (I counted 36) than the SuperBrightLEDs, however they are a larger module. Sadly, in a side-by-side comparison, it turns out that the SuperBrightLEDs are just that when the brake/turn signals are brought into play. The difference in brightness in this mode is noticeable.

That said, there is nothing wrong at all with the SuperModulation LEDs, and I'd recommend them as they fit a lot better in the sockets and seemed to be better assembled. While they aren't as bright as the SuperBrightLEDs when the turn signals and brake lights are brought into play, they are still plenty bright enough for every day use. I don't think you can go wrong with either set.

I've heard that some people have had issues with SuperBrightLED bulbs failing prematurely, but I can't speak to that.

Crappy audio quality, left side is SuperBrightLEDs and right side is SuperModulation LEDs​

Super Moderator
13,733 Posts
Thanks for the review.

Here's some pics of mine...

Some before shots..

Here's some pics of the new bulb assemblies...

Taillight (Red)

Brake light (Red)

Reverse Light (White)

Resistor pack (one per side)

Once they were installed we noticed that there was a feedback issues when the turn signals were on. The feedback caused the opposite side bulbs to flash dimmly. James resolved that by isolating each bulb with a diode. He also applied a very small drop of super glue in the corner of the bulb socket to help hold them in place, since they're heavier than the stock bulbs.

The LED's were made and installed my Supermodulation.

Some night of the bulbs at night...

A few more pics of the new Supermodulation tail lamp LED's in action...


I'm doing SCIENCE!
486 Posts
Discussion Starter · #4 · (Edited)
I just installed this kit today and I have to say Im impressed. They are much brighter then stock and IMO look way better then the stock bulbs.
That they do! I was really impressed with their build quality and overall fitment. I about blinding myself installing them (the reverse lights are -HID- bright).

James is a super stand-up guy, too.

US Army 19yrs and ......
45,275 Posts
Good stuff guys!

Sent from my C771 using AutoGuide.Com Free App

2,260 Posts
i need these i tried getting some putco ones for work plug and play but they dont sit for shit in the housing..................super mods ftmfw
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