I'm just curious if there's any merit to this article or is the Sierra simply the victim of long-life bulbs and poor aiming from the factory.
https://www.thetruthaboutcars.com/2015/10/gmc-hit-lawsuit-sierras-new-headlights/
Some more recent information in this article:
https://www.carcomplaints.com/news/2018/gmc-sierra-headlight-lawsuit.shtml
Seems as if GM has issued TSBs about upping the voltage to the headlamps. The complaint seems to allege that the shutter mechanism is the issue; the article states that the shutter creates shadows and reduces the bulbs' ability to illuminate.
It seems that the trucks in question use a single 9012 bulb to provide both low and high beam functions. That strikes me as a bit odd. Aren't dual filament bulbs usually used to provide low and high beam functions (disregard xenons).
https://www.thetruthaboutcars.com/2015/10/gmc-hit-lawsuit-sierras-new-headlights/
In the lawsuit, the complaint details many other complaints made by truck owners who reported similar low lights.
"The stock projector headlights on my new $60,000 GMC Denali 2500HD really SUCK! Could not see a damn thing 100 feet in front."
"This truck is very dangerous to drive after dark. I wish that I would have read the complaints about the 2014 trucks. My dealer seems to have no fix."
"My 1989 Toyota Pickup has better headlights then this $50,000 truck. Just spent over $150 to upgrade to LED lights and still not good enough. GM should take action now before someone gets hurt!!"
Some more recent information in this article:
https://www.carcomplaints.com/news/2018/gmc-sierra-headlight-lawsuit.shtml
Seems as if GM has issued TSBs about upping the voltage to the headlamps. The complaint seems to allege that the shutter mechanism is the issue; the article states that the shutter creates shadows and reduces the bulbs' ability to illuminate.
It seems that the trucks in question use a single 9012 bulb to provide both low and high beam functions. That strikes me as a bit odd. Aren't dual filament bulbs usually used to provide low and high beam functions (disregard xenons).
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