Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum banner
rocker arm
1-1 of 1 Results
  1. OEM Issues
    It started with my 05 TB turning on the check engine light. I checked the code, and it mentioned something about the knock sensor going off. I checked around and decided to replace the spark plugs in the truck. When that was done, I though everything was fine, except coil pack 4 and 6 didn't...
1-1 of 1 Results