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Discussion Starter #1
I have a 2005 trailblazer ext ls 4.2... i just purchased new headlight assembly i already have led headlights in my old assembly but i want want to install led switch back turn signals/ or just led amber lights... whats the best option the flash relay??.. ive seen many posts on using the lm487 but some say i need the lm486 For my make and year.. can anyone with the same year chime in if possible....
 
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