What spark plugs does a GMC Yukon XL use?

The GMC Yukon XL spark plug type varies by year and engine. Newer models (2010+) typically use iridium plugs for longer service life. Older models may use platinum or copper. Check the specs below for your exact year.

How often should I change spark plugs on a GMC Yukon XL?

Modern GMC Yukon XL models with iridium plugs can go 60,000-100,000 miles between changes. Older models with copper plugs need replacement every 30,000 miles. Replace sooner if you notice misfires, rough idle, or poor fuel economy.

What is the spark plug gap for a GMC Yukon XL?

Most GMC Yukon XL models use a spark plug gap between 0.039" and 0.044" (1.0-1.1mm). Pre-gapped plugs from the OEM are recommended. Do not re-gap iridium-tip plugs as it can damage the electrode.

Can I upgrade to iridium spark plugs in my GMC Yukon XL?

Yes, upgrading from copper or platinum to iridium is generally safe and beneficial. Iridium plugs offer better ignitability, longer life, and improved fuel economy. Just match the correct heat range and gap for your engine.

⚡Spark Plug Type

GMC Yukon XL Spark Plug Type

Find the correct spark plug type, gap size, and replacement interval for your GMC Yukon XL. Covers all model years with torque specs.

Quick Answer

The GMC Yukon XL typically uses iridium or platinum spark plugs. Newer models (2010+) use long-life iridium plugs rated for 60,000-100,000 miles. Check below for your specific year.

2019-2024

Spark Plug TypeIridium (long-life)

Plug Gap0.039" - 0.043" (1.0 - 1.1mm)

Replacement Interval60,000 - 100,000 miles

Torque Spec15 - 22 ft-lbs (check manual)

Quantity4 (inline-4) or 6 (V6)

Notes

→Iridium plugs last longer but cost more — do NOT re-gap iridium plugs
→Use a torque wrench — over-tightened plugs can strip aluminum heads
→Apply a thin coat of anti-seize to threads (unless plug is pre-coated)
→Use a spark plug socket with rubber insert to avoid cracking the ceramic insulator

Shop on Amazon →Full Repair Guide →

2013-2018

Spark Plug TypeIridium (long-life)

Plug Gap0.039" - 0.043" (1.0 - 1.1mm)

Replacement Interval60,000 - 100,000 miles

Torque Spec15 - 22 ft-lbs (check manual)

Quantity4 (inline-4) or 6 (V6)

Notes

→Iridium plugs last longer but cost more — do NOT re-gap iridium plugs
→Use a torque wrench — over-tightened plugs can strip aluminum heads
→Apply a thin coat of anti-seize to threads (unless plug is pre-coated)
→Use a spark plug socket with rubber insert to avoid cracking the ceramic insulator

Shop on Amazon →Full Repair Guide →

2007-2012

Spark Plug TypePlatinum or Iridium

Plug Gap0.039" - 0.044" (1.0 - 1.1mm)

Replacement Interval30,000 - 60,000 miles

Torque Spec13 - 20 ft-lbs

Quantity4 (inline-4) or 6 (V6)

Notes

→Iridium plugs last longer but cost more — do NOT re-gap iridium plugs
→Use a torque wrench — over-tightened plugs can strip aluminum heads
→Apply a thin coat of anti-seize to threads (unless plug is pre-coated)
→Use a spark plug socket with rubber insert to avoid cracking the ceramic insulator

Shop on Amazon →Full Repair Guide →

2001-2006

Spark Plug TypePlatinum or Iridium

Plug Gap0.039" - 0.044" (1.0 - 1.1mm)

Replacement Interval30,000 - 60,000 miles

Torque Spec13 - 20 ft-lbs

Quantity4 (inline-4) or 6 (V6)

Notes

→Use a torque wrench — over-tightened plugs can strip aluminum heads
→Apply a thin coat of anti-seize to threads (unless plug is pre-coated)
→Use a spark plug socket with rubber insert to avoid cracking the ceramic insulator

Shop on Amazon →Full Repair Guide →

2000-2000

Spark Plug TypeCopper or Platinum

Plug Gap0.028" - 0.044" (0.7 - 1.1mm)

Replacement Interval30,000 miles

Torque Spec13 - 18 ft-lbs

Quantity4-8 (varies by engine)

Notes

→Use a torque wrench — over-tightened plugs can strip aluminum heads
→Apply a thin coat of anti-seize to threads (unless plug is pre-coated)

Shop on Amazon →Full Repair Guide →

Frequently Asked Questions

What spark plugs does a GMC Yukon XL use?: The GMC Yukon XL spark plug type varies by year and engine. Newer models (2010+) typically use iridium plugs for longer service life. Older models may use platinum or copper. Check the specs below for your exact year.
How often should I change spark plugs on a GMC Yukon XL?: Modern GMC Yukon XL models with iridium plugs can go 60,000-100,000 miles between changes. Older models with copper plugs need replacement every 30,000 miles. Replace sooner if you notice misfires, rough idle, or poor fuel economy.
What is the spark plug gap for a GMC Yukon XL?: Most GMC Yukon XL models use a spark plug gap between 0.039" and 0.044" (1.0-1.1mm). Pre-gapped plugs from the OEM are recommended. Do not re-gap iridium-tip plugs as it can damage the electrode.
Can I upgrade to iridium spark plugs in my GMC Yukon XL?: Yes, upgrading from copper or platinum to iridium is generally safe and beneficial. Iridium plugs offer better ignitability, longer life, and improved fuel economy. Just match the correct heat range and gap for your engine.

GMC Yukon XL Repair Guides

→GMC Yukon XL Spark Plug Replacement →GMC Yukon XL Ignition Coil Replacement →GMC Yukon XL Oxygen Sensor Replacement

Browse all GMC guides →Browse all GMC Yukon XL guides →

More GMC Yukon XL Guides

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