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2014-2018 GMC Sierra 1500 spark plug & gap

The Sierra 1500 came with more than one engine, and they don't all take the same plug. Find your engine below for the exact part number, gap, and where to buy it.

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4.3L V6 · 2014-20184.3L EcoTec3 LV3

Spark plug part number

  • ACDelco41-168
  • NGK90220

Confirmed from ACDelco + retailer catalog · verified Jul 2026.

Gap

0.04 in (1.02 mm)

We don't stock a reviewed plug for this engine yet. Search the confirmed part number on Amazon — it's the safest way to land on the right plug.

Find ACDelco 41-168 on Amazon
Where this came from
  • GMPartsGiant genuine-GM-parts catalog — GMC Sierra spark plug fitment table, part 19459511 = ACDelco 41-168 — source
  • RockAuto retailer catalog — 2018 GMC Sierra 1500 4.3L V6 spark plug fitment page — source

5.3L V8 · 2014-20185.3L EcoTec3 L83

Spark plug part number

  • ACDelco41-168
  • NGK90220

Confirmed from ACDelco + retailer catalog · verified Jul 2026.

Gap

0.04 in (1.02 mm)

We don't stock a reviewed plug for this engine yet. Search the confirmed part number on Amazon — it's the safest way to land on the right plug.

Find ACDelco 41-168 on Amazon
Where this came from
  • GMPartsGiant genuine-GM-parts catalog — GMC Sierra spark plug fitment table, part 19459511 = ACDelco 41-168 — source
  • RockAuto retailer catalog — 2016 GMC Sierra 1500 5.3L V8 spark plug fitment page — source

6.2L V8 · 2014-20186.2L EcoTec3 L86

Spark plug part number

  • ACDelco41-168
  • NGK90220

Confirmed from ACDelco + retailer catalog · verified Jul 2026.

Gap

0.04 in (1.02 mm)

We don't stock a reviewed plug for this engine yet. Search the confirmed part number on Amazon — it's the safest way to land on the right plug.

Find ACDelco 41-168 on Amazon
Where this came from
  • GMPartsGiant genuine-GM-parts catalog — GMC Sierra spark plug fitment table, part 19459511 = ACDelco 41-168 — source
  • RockAuto retailer catalog — 2015 GMC Sierra 1500 6.2L V8 spark plug fitment page — source

Part number and gap confirmed against two independent maker sources — never changed by what an affiliate link pays us. Heat range is shown per brand on purpose: a Denso number and an NGK number don't mean the same thing, so never compare them directly. Your owner's manual is always the final word.