Frequently asked questions

What vehicles does the ACDelco 41-106IP fit?▾

The 41-106IP (GM part number 12688094) is the OE iridium plug for the 2.7L L3B turbocharged inline-four in the 2019+ Chevrolet Silverado 1500 and GMC Sierra 1500 (T1XX). It does not fit the EcoTec3 4.3L V6, 5.3L, or 6.2L V8 in these same trucks (those use the ACDelco 41-114 at a wider 0.040 in gap), and the 3.0L Duramax diesel has no spark plugs. Always verify your engine, not just your truck model, before buying.

Is the ACDelco 41-106IP iridium or platinum?▾

Both, on different electrodes. The center electrode has an iridium tip and the ground electrode has a platinum tip, confirmed via the manufacturer's technical specification. That dual-precious-metal combination is why GM specifies it for a direct-injection turbo application.

What is the spark plug gap for the 41-106IP?▾

0.030 inch (0.75 mm), pre-set at the factory. Manufacturer installation guidance says not to re-gap it: the fine iridium center electrode can be damaged by prying a gap tool against it. Confirm the value against your engine's service manual before installing.

How many 41-106IP plugs does a 2.7L L3B need?▾

Four, one per cylinder. The single listing (this ASIN) ships one plug despite the product photo showing four for scale, so order four (or a multi-pack listing) for a full set.

What's the difference between the ACDelco 41-106 and 41-106IP?▾

They are different parts despite the similar number. The plain 41-106 (no suffix) is a gasket-seat plug for the 2.0L LSJ Cobalt SS and Saturn Ion Red Line at a 0.040 in gap. The 41-106IP (Improved Performance) is a tapered-seat plug for the 2.7L L3B turbo at a 0.030 in gap. Don't cross-shop the two part numbers.

Why does ACDelco 41-106IP GM Original Equipment Improved Performance Iridium Spark Plug have a California Prop 65 warning?▾

The Amazon listing for ACDelco 41-106IP GM Original Equipment Improved Performance 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 41-106IP GM Original Equipment Improved Performance Iridium Spark Plug has no Safety Data Sheet, so there's no chemistry breakdown to translate beyond that.

From the manufacturer

Marketing copy from ACDelco, via Amazon. Not editorial.

•Iridium offers excellent engine idle stability and smooth performance

•Iridium allows for small, efficient electrode designs for reliable cold starting and quick acceleration

•Iridium fine-wire electrode helps burn away carbon deposits on the tip of the plug as they form

•One piece suppressor seal helps block radio frequencies that can affect vehicle electronics

•Suppressor seal meters spark energy for long electrode life and helps prevent combustion leakage

•Some ACDelco GM Original Equipment parts may have formerly appeared as GM Genuine Parts (OE) or ACDelco Professional

•ACDelco GM Original Equipment parts are designed, engineered and tested to rigorous standards, and are backed by General Motors

•GM Engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle

•GM regularly updates production and service part designs to integrate new materials and technologies

ACDelco·Spark Plug

ACDelco 41-106IP GM Original Equipment Improved Performance Iridium Spark Plug

Name: 41-106IP GM Original Equipment Improved Performance Iridium Spark Plug
Brand: ACDelco

6.8*/10

CarCareTruth ScoreDecent

6.69.05.0

CarCareTruth Score

Decent.

Provisional, owner feedback still building · reviewed Jul 2026

Ranks #23 of 31in Spark Plug→

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CarCareTruth's Analysis

Last reviewed July 13, 2026

TL;DR ACDelco 41-106IP (GM 12688094) is the OE iridium plug for the 2019+ GM 2.7L L3B turbo in the Silverado 1500 and Sierra 1500, pre-gapped to 0.030 in at heat range 9. GM's schedule calls for replacement near 60,000 miles (shorter than the V8 interval), and it ships as a single plug, not the four pictured.

What it is and how it performs

Iridium center electrode with a platinum-tipped ground, tapered 12mm seat, factory-gapped to 0.030 in (do not re-gap). ACDelco GM Original Equipment is the GM OE supplier; 41-106IP is dual-numbered as GM 12688094, the factory plug for the 2.7L L3B turbo in the 2019+ Silverado 1500 and Sierra 1500. GM's schedule lists roughly 60,000 miles here, shorter than the ~97,500-mile EcoTec3 V6/V8 interval, since turbo direct-injection engines run harder on plugs. No community removal-photo data confirms that interval yet. The listing photo shows four plugs; this ASIN ships one.

Who should buy this, and who should skip it

Right pick for the 2019+ Silverado 1500 or Sierra 1500 with the 2.7L L3B turbo, since 41-106IP equals GM 12688094 directly. Skip it if your truck has the 5.3L, 6.2L, or 4.3L EcoTec3 engine (those use the ACDelco 41-114 instead) or the 3.0L Duramax diesel, which has no spark plugs.

Safety and environmental impact

No chemical exposure pathway: a passive ceramic-and-steel part with no SDS. The iridium-and-platinum electrode carries a modest precious-metal footprint, only partly offset by the shorter turbo-specific interval versus the longer-lived EcoTec3 iridium plug. The steel shell recycles as ferrous scrap; the ceramic insulator goes to landfill, with no take-back program as of 2026.