Do i need anti-seize lubricant with these spark plugs?

You definitely should use antiseize. Anyone who tells you different doesn't know what they're talking about. GM tech for 20 years, and I never installed a spark plug without antiseize, ever! It's even more crucial in an aluminum head.

Will these work for 2014 chevy silverado ltz 5.3?

I have a 2014 5.3 LT and they fit my silverado. Check with a local parts store if your not sure.I bought a replacement plug at sanels.

Will this work on a 2007 Chevy avalanche

Have to check gms part number for that year

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⚡ Ignite your drive with GM’s precision-engineered iridium spark plug!

PRECISION IRIDIUM SPARK - Experience unmatched engine idle stability and peak performance with advanced iridium technology.
CARBON BUSTING ELECTRODE - Self-cleaning fine wire electrode actively burns away carbon deposits, extending spark plug life.
GM ENGINEERED EXCELLENCE - Designed and rigorously tested by GM engineers to meet exact OE standards for Chevrolet, Buick, GMC, and Cadillac.
LONG LASTING RELIABILITY - Durable construction ensures consistent spark energy and prevents combustion leakage for worry-free drives.
ELECTRONICS FRIENDLY DESIGN - Integrated suppressor seal prevents radio frequency interference, protecting your vehicle’s sensitive electronics.

The ACDelco GM Original Equipment 41-114 Iridium Spark Plug delivers superior engine performance and longevity through its fine wire iridium electrode and one-piece suppressor seal. Engineered and validated by GM for Chevrolet, Buick, GMC, and Cadillac vehicles, it ensures stable idling, reduced carbon buildup, and protection against electronic interference, making it a trusted choice for professional-grade vehicle maintenance.

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€ 48.69

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Netherlandsstore

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Manufacturer	ACDelco
Brand	ACDelco
Model	12622441
Product Dimensions	11.18 x 8.89 x 2.54 cm; 40.82 g
Item model number	41-114
Exterior	Polished
Manufacturer part number	12622441
OEM Part Number	12622441
Item Weight	40.8 g

ACDelcoGM Original Equipment 41-114 Iridium Spark Plug (Pack of 1)

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