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Eric
Eric, Automotive Repair Shop Manager
Category: Chevy
Satisfied Customers: 23910
Experience:  20+ yrs. experience as repair shop manager and technician.
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2003 CHEVY: I AM TRYING TO CHANGE SPARK PLUG

Resolved Question:

I AM TRYING TO CHANGE SPARK PLUG ON A 2003 CHEVY TRAIL BLAZER BUT I SEE NO WIRES OR PLUGS WHERE ARE THEY THANK YOU XXXXX
Submitted: 4 years ago.
Category: Chevy
Expert:  Eric replied 4 years ago.

Hi,

 

The plugs are located under the 6 individual coils mounted atop the engine:

 

Removal & Installation
4.2L Engine

  1. Remove the air cleaner outlet resonator.
  2. Disconnect the ignition coil connectors (1) from the ignition coils.

    Click
    View Full Image

    Fig. Detach the connectors (1) and remove the bolts (2) from the ignition coils

  3. Remove the retaining bolts (2) from the ignition coils.
  4. Remove the ignition coils (1) from the engine.
  5. Remove spark plugs with appropriate spark plug socket and extension

 

If yours is the 5.3L V8 instead of the more common 4.2L V6, let me know and I can provide those directions

Eric, Automotive Repair Shop Manager
Category: Chevy
Satisfied Customers: 23910
Experience: 20+ yrs. experience as repair shop manager and technician.
Eric and 6 other Chevy Specialists are ready to help you
Customer: replied 4 years ago.
do you have any ideal what i should gauge these plugs at thank you again the owners manuel is no help
Expert:  Eric replied 4 years ago.

Hi,

 

give me a couple of minutes to look it up

Expert:  Eric replied 4 years ago.

Hi,

 

Ok, I am showing the gap as .050"

 

GASOLINE ENGINE TUNE-UP SPECIFICATIONS

20034.2S0.050-NA-HYDHYD
4.3W0.060-- B 58-64600625HYDHYD
5.3P0.060-- B 55-62625HYDHYD
1NOTE: The Vehicle Emission Control Information label often reflects specification changes made during production. The label figures must be used if they differ from those in this chart. 2- Distributorless ignition, cannot be adjusted 3- With key ON and engine OFF 4- Distributorless ignition, cannot be adjusted 5- Idle speed is maintained by the PCM

Customer: replied 4 years ago.

Thank you so much for the added help you have been great, heck even a confused woman has it under control now lol thanks again

sherry

Expert:  Eric replied 4 years ago.

Hi,

 

no problem and anytime you have a question on it, you can request me and it will be directed straight to me. Hope you have a great weekend!

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