Bosch plugs-never use them in your GM

[92BurbinAustin]

I found out the hard way to never use Bosch in a GM.
I installed the correct Bosch plug for the application as recommended by Autozone, however within less than 2 hours of driving I encountered major missing and what I thought was backpressure. The symptoms felt much like a clogged catback, so I had my mechanic check the cat. Not the cat. I mentioned the plug change and he said always use AC Delco in a GM (he is not a dealer). I went to a different parts store and ask if they even had complaints about Bosch plugs. He said definitely in domestics and specifically in GMs. So I change to the AC Delco and no problem now.

I let the Autozone store manager have my opinions on this and will write them a letter about the potentially expensive and very inconvenient situation.

[stubbornmike]

you know I had the same problem not only did I have the same problem but they also melted they were only plantium. I didnt know that I needed doulble platium in the vortec motor. They would only give me store credit since the melted. I bought autolite double platium they work good. I wanted acdelco rapidfire double platium but couldnt find them here.