Are these made for square or round coils ?

The coil connection is a round rubber boot that goes over the ceramic protrusion of the coil and the electrode wire goes inside the coil. The coil boot is not square but round! Which was the case with my 2004 GMC Sierra.

Will these fit a 2002 Chevy Avalanche 5.3?

They should fit your 02 Chevy 5.3. I installed them on my 05 Chevy 5,3 and they fit perfectly.

Will these fit a 2006 gmc sierra 1500

i got a chevy with a 6.0 2004 and they fit great so i would say yes they are almost the same

Will these fit 2016 silverado 5.3l

They will fit .the wires are a little longer than the ac delco ones. On the passenger side the furthest away might have to make an adjustment to the heat shield. Check my pictures of my engine.

Deliver to Belarus

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JDMSPEED High Performance Spark Plug Ignition Wire for 2000-2009 Chevy GMC V8

JDMSPEED High Performance Spark Plug Ignition Wire for 2000-2009 Chevy GMC V8

Product ID: 56977426

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Details

Brand
JDMSPEED
Material
Silicone
Item Weight
0.45 Kilograms
Cable Length
5.35 Inches
Cable Type
spark plug

⚡10.2mm Spiral Wound Wire

🔥Ultra High Temp Silicone Boots

🛡️Kevlar Core for Ultra Low Resistance

Description

⚡ Ignite your ride with JDMSPEED – Power, Precision, Performance!

KEVLAR CORE DURABILITY - Experience ultra-low resistance and enhanced durability with a Kevlar-reinforced core built to last.
BACKED BY ONE YEAR WARRANTY - Confidence guaranteed with a full one-year warranty protecting your investment.
PERFECT FIT FOR CHEVY GMC V 8 - Tailored specifically for 2000-2009 Chevy GMC V8 models ensuring seamless installation and optimal performance.
HEAT RESISTANT SILICONE BOOTS - Stay worry-free with high-temp silicone boots and sleeves engineered to withstand extreme engine heat.
PRECISION SPIRAL WOUND DESIGN - Maximize ignition efficiency with 10.2mm spiral wound wire for consistent power delivery.

JDMSPEED High Performance Spark Plug Ignition Wire features a 10.2mm spiral wound design with a Kevlar core for ultra-low resistance, paired with high-temperature silicone boots for durability. Designed specifically for 2000-2009 Chevy GMC V8 engines, this ignition wire ensures reliable power delivery and comes with a one-year warranty for peace of mind.

Specifications

Brand	JDMSPEED
Material	Silicone
Item Weight	0.45 Kilograms
Cable Length	5.35 Inches
Cable Type	spark plug wire
Connector Type	Boot
Wire Diameter	10.2 Millimeters
Manufacturer	JDMSPEED
UPC	714131641352
Item Weight	15.8 ounces
Item model number	D071
Is Discontinued By Manufacturer	No
Manufacturer Part Number	D071