GMC Trucks Have Terrible Headlights A dramatization of the Sierra's headlights. GMC Sierra owners are seeing red. Well, technically they’re not seeing anything. The headlights in the 2014 and 2015 model years are so dim, you’d probably get better illumination from a jar of fireflies taped to your bumper. Now with a new design for 2016, will owners of previous model years get left in the dark? In prior model years, GM used three different bulbs for the Sierra’s headlights — a H11LL bulb for the low beams, a 9005LL bulb for the high beams and a 5202 bulb for the fog lights. But starting with the 2014 model year, GM switches to one 9012 halogen single filament bulb for both the low and high beams. Historically, automakers have at least used dual-filament bulbs for low / high beams. “The headlights are terrible, low beams are absolutely useless and high beams are only slightly better.” For 2016, GM “refreshed” the Sierra design with a new grille, front fascia and yep … headlight design.

On March 1st, 2015, GM released TSB #PIT5374 to its dealers titled Headlight Performance (BCM Calibration and Bulbs). Technical service bulletins (TSBs) are a set of instructions on automaker sends to its dealers about how to handle specific problems. Some customers may comment of poor headlight performance when driving in very dark rural areas. While the headlights meet all Federal Motor Vehicle Safety Standard (FMVSS) requirements and Canada Motor Vehicle Safety Standard (CMVSS) requirements, customers may request better headlight performance for these very dark rural areas. The TSB goes on to make the following recommendations once the headlights have been diagnosed to be working properly: The BCM is the body control module and its a generic term for a control unti that monitors and controls electronic accessories, like the headlights, on a vehicle. The TSB says that vehicles built after the referenced dates already get the increased voltage.New headlights made by Vosla.

Now we’re starting to see the light. In late 2015 a class-action lawsuit was filed claiming Sierra 1500 owners can’t drive at night because of the defective headlights. The lawsuit points to GM’s TSBs and the recent redesign as evidence that GM knows how bad this problem really is. “Brand new GMC Sierra truck that I am afraid to drive an night. First thought that my eyes suddenly were falling apart or my windshield was tinted, but these headlights are the worst I have ever seen (or more correctly, not seen) on a vehicle.” “I have owned eleven vehicles in my lifetime and these are the worst headlights I have experienced. A very short cutoff and worst of all, no side illumination. — 2014 Sierra 1500 owner” Home > Search by Bulb Size > 9006, 9012, HB4 Cross reference: 9006 is also known as HB4; 9006 LED or HID bulb will also fit: 9012 housings Auto, Motorcycle Parts & Accessories will match suppliers for you! 2009-2014 Ford F150 OEM Headlights with halos

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Back in the 1980s headlight companies developed sealed reflector/lens assemblies that permitted replacement of the bulb. This was a breakthrough: Not only were the replaceable-bulb halogens brighter than the older style of light, but they also meant that burning out a bulb didn't have to mean replacing an entire assembly.There was just one problem: Federal rules demanded "sealed beams" or all-in-one headlight assemblies with a nonreplaceable bulb inside. It took until 1984 for American drivers to get the better headlights they wanted while regulators got a grip on the notion that the bulbs should be replaceable.It should come as no surprise that technology is transforming cars much faster than stodgy government rules can adjust. More recently, laws specified the wattage of bulbs for taillights and other lights. LEDs use much less power than incandescents and didn't meet that requirement even though they were as bright or brighter than the old filament-based bulbs, so those regulations had to change.