OEM 2005 Chevrolet Trailblazer Spark Plug

2005 Chevrolet Trailblazer Parts Questions & Experts Answers

• Q: How to replace spark plugs on 2005 Chevrolet Trailblazer?

  A: You must activate off the Ignition Switch followed by uninstalling the ignition coils before beginning Spark Plug replacement. Turn off ignition first and then inspect for engine cooling before removing spark plugs since heat during the process can cause Cylinder Head thread damage. A thread chaser should be used to clean the Spark Plug recess area from foreign material that could damage threads and stop proper seat placement of the new plug. Measure the Spark Plug gap of new plugs against specified measurements before applying any necessary corrections. Using spark plugs from an inappropriate heat level for the specified vehicle will result in critical engine damage. A round feeler gage should measure all new and reconditioned spark plugs for gap before installation because handling might have modified pre-set gaps. The installation process requires inserting the spark plugs with attention to their proper connection to the Cylinder Head while ensuring complete seating of the plugs. You should use a thread chaser if any cleaning of the threads is required. Reinstall the ignition coils after tightening the spark plugs to 18 n.m (13 lb ft).