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There are not any plugs wires. The Inline six uses coil packs over top of each spark plug.
The 2005 Chevy Trailblazer has Coil-On-Plug ignition coils so there are 6 "coil packs". Each one is mounted on top of the spark plug.
The firing order is 1342 and the coil packs are 41 and 32.
On the 4.2 L I6 the very front of the engine is #1 and the last in the back is #6
The 2000 Blazer with the 4.3 engine has one coil.
The fully electronic ignition of the 4200 vortec LL8 Inline 6 cylinder engine does not use a coil. It in fact uses coil packs located over each individual spark plug. The wires can be seen on the top of the engine where they attach to the coil packs. The coil packs are held in place by long thin bolts that reach down to the cylinder head. Once removed they can be pulled off and the spark plugs can be accessed. www.trailvoy.com All the answers for your Trailblazer from true enthusiasts.
After you remove the coil packs a swivel socket and extension works fine. www.trailvoy.com
Yes, there is a coil on each spark plug.
on the back side of motor
The spark plugs are located along the top of the motor. They are covered by coil packs so you must remove the coil packs first to get to the spark plugs underneath. #1 is the front of the engine. If you are having misfire issues it may be the coil packs. We have a how to section with pictures at our enthusiasts website www.trailvoy.com
The module is located underneath the coil packs.
All the coils are the same, each one must be connected to the connector for the cylinder the coil is connected to the spark plug for