Having problems with your 2004 Chevrolet TrailBlazer ?
What's the name of the part a spark plug sits in?
The spark plug is screwed into the cylinder head. Spark plug is #5 in picture below, coil pack is #1
Repair Help & Product Troubleshooting for 2004 Chevrolet TrailBlazer
Tips for a great answer:- Provide details, support with references or personal experience .
- If you need clarification, ask it in the comment box .
- It's 100% free, no registration required.