2017 GMC Acadia SLFACTORY OEM SERVICE PROCEDURE

Spark Plug Replacement

Fig 1: Spark Plug
GM2809753Courtesy of GENERAL MOTORS COMPANY
Callout Component Name
CAUTION:

This engine has aluminum cylinder heads. Do not remove the spark plugs from a hot engine, allow it to cool first. Removing the spark plugs from a hot engine may cause spark plug thread damage or cylinder head damage.

Preliminary Procedure Remove Ignition Coil. Refer to Ignition Coil Replacement 
1 Spark Plug (Qty: 4)

Procedure

  1. If reusing the spark plugs, inspect for wear or damage. Refer to Spark Plug Inspection 
  2. If using NEW spark plugs, do NOT attempt to check the spark plug gap. The plugs come pre-gapped.

Tighten 
20 N.m (15 lb ft)
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.