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Prices may varyThis product ranks #10 of 28 in Spark Plug.Three above it ↓
Last reviewed July 2, 2026
TL;DR ACDelco 41-114 (GM 12622441) is the OE iridium plug for the EcoTec3 4.3L, 5.3L, and 6.2L V-engines in the 2014-2026 Silverado 1500 and Sierra 1500, one part number for all three at a 0.040 in gap. Tapered seat, ships pre-gapped, GM service interval near 97,500 miles (manufacturer claim, no community removal-photo confirmation located).
Iridium center electrode on a J-gap nickel-alloy ground, alumina-ceramic insulator, tapered-seat shell. ACDelco is the GM OE supplier and 41-114 is GM 12622441 under dual numbering, so this is the factory-specified plug for the EcoTec3 engines, not a third-party cross-reference. It covers the 2014-2018 K2XX Silverado 1500 and the 2019-2026 T1XX Sierra 1500 across the 4.3L LV3, 5.3L L83/L84, and 6.2L L86/L87 with no documented fitment errors. GM specifies replacement near 97,500 miles. Plugs ship pre-gapped to the 0.040 in spec; gap-check the fine-wire electrode gently before install. The 2.7L L3B turbo-four in T1XX trucks uses a different plug; the 3.0L Duramax diesel has no spark plugs.
Right pick for the EcoTec3 V-engine versions of the 2014-2026 Silverado 1500 or Sierra 1500, since 41-114 equals GM 12622441 directly. Skip if your truck has the 2.7L turbo or 3.0L diesel, or if your engine takes a different GM part number or gap.
No chemical exposure pathway: a passive ceramic-and-steel part with no SDS. The iridium electrode's small precious-metal mass is offset by the long service interval. The steel shell recycles as ferrous scrap; the ceramic insulator goes to landfill, with no take-back program as of 2026.
The 41-114 (GM part number 12622441) is the OE iridium plug for GM trucks and SUVs with the EcoTec3 engine family: the 4.3L LV3 V6, the 5.3L L83/L84 V8, and the 6.2L L86/L87 V8. That spans the 2014-2018 Chevrolet Silverado 1500 (K2XX) and the 2019-2026 GMC Sierra 1500 (T1XX), plus related GM vehicles of both generations. One part number covers all three EcoTec3 engines. If your Sierra or Silverado has the 2.7L L3B turbo-four, that engine requires a different plug. The 3.0L Duramax diesel has no spark plugs. Always verify your VIN at a GM dealer or the ACDelco fitment tool before buying.
Iridium. The center electrode is iridium, confirmed on the retail packaging (Iridium Spark Plug) and in the product specifications. Iridium has a high melting point and allows a fine-wire electrode, which is why GM specifies it for the EcoTec3 engines at a long service interval.
0.040 inch (1.0 mm) for the GM EcoTec3 V8 and 4.3L V6 engines, covering both the 2014-2018 Silverado 1500 and the 2019-2026 Sierra 1500. The plug ships pre-gapped, but iridium plugs have a delicate fine-wire center electrode, so check the gap with a wire-style gauge and avoid prying on the center electrode if an adjustment is needed. Confirm the value against your engine's service manual.
One per cylinder: six for the 4.3L LV3 V6, eight for the 5.3L (L83/L84) or 6.2L (L86/L87) V8. The Amazon single (Pack of 1) is an add-on item that must ship with a larger qualifying order, so most buyers order a full set or the multi-pack.
The Amazon listing for ACDelco 41-114 Professional Iridium Spark Plug carries a California Prop 65 warning. California requires this warning on a very wide range of manufactured goods — including rubber, vinyl, plastic, and metal automotive parts — whenever trace exposure to any of roughly 900 listed substances (commonly phthalates or heavy metals) is possible, regardless of whether the specific product poses a meaningful health risk. As a passive accessory, ACDelco 41-114 Professional Iridium Spark Plug has no Safety Data Sheet, so there's no chemistry breakdown to translate beyond that.
Marketing copy from ACDelco, via Amazon. Not editorial.
Per manufacturer cross-reference. Verify on Amazon before purchase.
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