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I went oem acdelco iridium. Like 45$ for a set at rockauto
They are okay for me. Get the code. Maybe the insulator cracked on one of them when installing.
I ended up purchasing the ACDelco 9748RR Professional Spark Plug Wire Set and the
ACDelco 41-110 Professional Iridium Spark Plug I popped a check engine light and the Trucks starting to stall. They arrive on friday. How do you like the ACDelco 41-110 Professional Iridium Spark Plugs.
My acceleration has gotten better, a little better gas mileage so it was true my spark plugs were going out. The code popped again so it looks like the exhaust vent solenoids i had installed last year went luckily they had a two year warranty so when you get them replaced this month.My 08 Denali has been stumbling a bit on acceleration when I first start it up. I initially thought it might be the transmission, but it has 82k miles and the original plugs and wires so I'm going to swap them out. Any thoughts on the ACDelco stuff so far?