The ignition coil is down between the firewall and the back of the engine
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.
If you take the engine cover off, down the left side of the block (passenger side of the car) are four coil packs. You remove the coil packs and the plugs are inside the block. You'll need an extension to remove them.
Yes. It will seem like your car is "bogged down" or has a loss of power. But before replacing a coil pack, try removing a spark plug and seeing if those need to be changed.
the coil packs are held on to the brackets buy either a seven mm or 8 mm bolts on each side of the coil packs. if you have the twin packs on each side of the motor. now if you have to take the bracket off the you got, i think, 14mm and 15mm bolts down on the face of the heads.
I wouldn't call it dangerous but you may break down on the road.
Your engine has individual coil packs, most of the time one or more of the coils is breaking down and arching in the spark plug tube, take it to a professional to diagnose properly.
A defective coil can cause an engine to run erratically or not start at all. Coils can weaken, causing insufficient spark. A coil can also breakdown once it heats up then work when it gets cooled down.
Fuel pump, check pressure Coil, see if you are getting spark to plugs
Crossed wires! or a wire not pushed all the way down, or Possibly but highly unlikely a bad wire
yes, they do! You have to take that pretty little ecotec plate off the top of the engine, the ecotec plate is really the coil packs, and lift that up and the plugs are down under that plate.
Follow the wires from the coil packs: There are four of differing lengths equidistant to each other as you are looking down at the engine with the hood up. Pull on the BOTTOM of the wire "boot" and there will be your spark plug.