What size socket is need for removel and inserting these

I believe a 5/8 spark plug socket.

Hola el anuncio dice 1 spark plug, no dice paquete de 6, en las respuestas dice que es un paquete de 6 bujias, porque no se específica en el anuncio?

Hola! El paquete trae 6 bujías. Puedes comprarlo con confianza, son 100% genuinas.

is this the correct size for a 2002 chevrolet trailblazer lt 4.2?

Most likely. The Trailblazer and the GMC Envoy have the same engine, and it fit the Envoy engine that I have. Be careful not to cross thread however. That is easy to do and anti-seize on the threads is highly recommended.

Why this side say do not fit on my chevrolet trailblazer ltz 4.2 l6 year 2003?

41-103 is CORRECT number for your vehicle. You can buy either iridium plugs (which is what I purchased in Oct 2017, and they still work fine) or you can buy the cheap original equipment plugs. But the 41-103 will work fine. Safe motoring

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ACDelco 41-103 Professional Iridium Spark Plug (6 Pack)

Product ID: 290191013

Details

Brand
ACDelco
Core material
Iridium
Number of Items
6
Top material type
Nickel
Vehicle service type
UTV

⚡Iridium fine-wire electrode for superior ignition

🔇Suppressor seal blocks radio frequency interference

🔥Improved cold starts & quicker acceleration

MX$3794

Duties & taxes included

In stock

Sold byAmazon MexicoDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚡ Ignite your drive with pro-grade spark plugs that keep you ahead of the pack!

RAPID COLD STARTS - Smaller electrode design accelerates ignition for faster starts
ELECTRONICS FRIENDLY - One-piece suppressor seal prevents radio frequency interference with vehicle systems
DURABILITY ENGINEERED - Suppressor seal meters spark energy for extended electrode life and combustion sealing
FUEL EFFICIENCY BOOSTER - Burns away carbon deposits to optimize fuel economy
PRECISION IGNITION POWER - Iridium electrode ensures stable engine idle and smoother performance

The ACDelco 41-103 Professional Iridium Spark Plug 6-pack features advanced iridium fine-wire electrodes for enhanced ignition, improved cold starts, and smoother engine performance. Its suppressor seal protects vehicle electronics from interference while extending spark plug life, making it an essential upgrade for UTV owners seeking reliability and efficiency.

Specifications

ASIN	B01JQ2L5DS
Brand	ACDelco
Brand Name	ACDelco
Compatible with Vehicle Type	UTV
Core Material	Iridium
Core material	Iridium
Customer Reviews	4.7 out of 5 stars 872 Reviews
Manufacturer	ACDelco
Manufacturer Part Number	41-103
Number of Items	6
OEM Equivalent Part Number	41-103
Top Material Type	Nickel
Top material type	Nickel
UPC	707773689622
Unit Count	6.0 Count
Vehicle service type	UTV

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