M-AUTO Switchback LED Tube DRL Headlights Assembly Compatible with 99-07 GMC Sierra 1500, 99-04 2500, 01-07 1500 HD/2500 HD/3500 HD, 99-06 Yukon, 00-06 Yukon XL 1500/2500

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Too little reflective, doesn't project light effectively.

Great product good price

I will say over all I love them, or at least the way they look. that said I feel like the manufacturing was bare minimum. cheaply designed making strength in th.e connection point holding the adjustment bolts. I was having a hard time getting last pin in. mounting braket not quite lining up. so I put some pressure to the inside ( really not much pressure). with little effort the mount that the adjustment bolt connects to snapped clean off. after inspection it's clearly a poor design.

The bumper lights are not switchback and the white light is a parking light not drl. Headlights have working DRLs and adjustments, I spliced into constant power and ground from the turn signal socket. The resistors on the turn signal don’t work and I have hyper flash on the right side. I’m going to buy a different set of bumper lights that use bulbs. Not worth the money one bit. DNA motoring has the same headlights with a black bumper light that won’t fail you. Would give it 0 stars if I could.Edit: I got the bumper lights to be DRLs and have the turn signals work. You have to splice from parking light wires (on the bumper light) to daytime running light (brown wire) to get them to work like mine. I had my right tail light out with I repaired and I believe it fixed the hyperflash issue. Still not switchback/sequential but look very good. Would give it 4 stars if it was easy for the average person to set up.

Need to make sure that the units are properly sealed to prevent moisture from getting into them.

Had I read the reviews first, I wouldn’t have wasted any money on these. Basically the same as everyone else. Don’t even remotely work like they are said to per the sellers description. No switchback, the “daytime running lights” don’t even work at all. They fit in so loose they rattle around. And they point up too high and you really can’t even adjust them. I am an auto body tech, with years of experience. So even though they recommend “professional install” it does not matter, as I am in fact a professional. And in my professional opinion these lights are trash. Do yourself a favor and save a couple of hundred bucks and look elsewhere.

They are almost impossible to adjust with halogen and LED lights in them. They actually blind oncoming vehicles. The adjusters are not for low and high beam. One is left and right and one is up and down. The high beams actually sit lower than the low beams. I’ve been a mechanic for 10 years and they’re just impossible to adjust. The switchback feature does not work at all. If you’re looking for a set of lenses to get you by, these are the ones. They are very clear and great visual quality however, I would not buy again.