【When should I replace it?】
Problems with the generator "stuttering" and not firing properly. An intermittent or continuous shuddering of the engine with an abnormal "clunking" sound indicates a possible problem with one of the spark plugs. If the color of the spark plug is stained oil, it indicates that the spark plug gap is out of adjustment or too much oil supply, and the high pressure wire is short-circuited or disconnected. If it is smoky black, indicating that the spark plug hot and cold type selection error or thick mixture, oil upward. If the spark plug is seriously eroded, the top of the scar, black lines, rupture, electrode melting and other phenomena, which indicates that the spark plug has been damaged, must be replaced immediately.

Part OE Number:
91418, ILTR5E11, 12598004, 12622441, 12625058, 3474

Pakage includes:
Pack of 8 Iridium Platinum Spark Plugs

Fitment:
Compatible with Escalade 2015-2020 6.2L
Compatible with Escalade 2021-2023 6.2L
Compatible with Escalade ESV 2015-2020 6.2L
Compatible with Escalade ESV 2021-2023 6.2L

Compatible with Camaro 2016-2020 6.2L
Compatible with Corvette 2014-2019 6.2L
Compatible with Silvera-do 1500 2014-2023 5.3L
Compatible with Silvera-do 1500 2014-2023 6.2L
Compatible with Silvera-do 1500 LD 2019-2019 5.3L
Compatible with Silvera-do 2500 HD 2020-2023 6.6L
Compatible with Silvera-do 3500 HD 2020-2023 6.6L
Compatible with Suburban 2015-2023 5.3L
Compatible with Suburban 2019-2023 6.2L
Compatible with Suburban 3500 HD 2019-2019 6.0L
Compatible with Tahoe 2015-2023 V8 5.3L, Tahoe 2018-2023 6.2L
Compatible with Sierra 1500 2014-2023 5.3L
Compatible with Sierra 1500 2014-2023 6.2L
Compatible with Sierra 1500 Limited 2019-2019 5.3L
Compatible with Sierra 1500 Limited 2022-2022 5.3L/6.2L
Compatible with Sierra 2500 HD 2020-2023 6.6L
Compatible with Sierra 3500 HD 2020-2023 6.6L
Compatible with Yukon 2015-2020 5.3L/6.2L
Compatible with Yukon XL 2015-2020 5.3L/6.2L

Features:
Condition: 100% Brand New
Design According To OEM Parts.
Resistant and not easily damaged.
Easy to install, directly replacement.
Strict factory QC testing, high quality assurance.