Are coil packs sold at auto parts stores just as good as from the dealership for a 2002 Chevrolet Trailblazer?

They all come from the same place, just depends on the brand.
The dealership is going to rip you off with the price, however.

Why did I get a thumbs down for that?Are coil packs sold at auto parts stores just as good as from the dealership for a 2002 Chevrolet Trailblazer?
There OEM replacements. They take the same load and specific by vehicle. Save yourself money and go thru the auto parts store. Most parts come with warranties so you have nothing to worry about.Are coil packs sold at auto parts stores just as good as from the dealership for a 2002 Chevrolet Trailblazer?
yesAre coil packs sold at auto parts stores just as good as from the dealership for a 2002 Chevrolet Trailblazer?
yep, rest assured they are just as good or maybe a little better.