MAS Ignition Coil Set for Chevrolet Colorado GMC Canyon H3 Isuzu i-350/i-370 — Set of 5 Direct-Fit 3.5L/3.7L Replacement, OE-Style

MAS set of five ignition coils replaces worn units on 2004–2008 3.5L and 3.7L GM and Isuzu V6 engines to restore reliable spark delivery and drivability.

These five ignition coil packs are engineered as direct-fit replacements for specific Chevrolet Colorado, GMC Canyon, Hummer H3, and Isuzu i-350/i-370 model years equipped with naturally aspirated 3.5L or 3.7L L5 engines. Built to match OE mounting points and electrical connections, the set is intended to solve common ignition symptoms caused by failing coils while fitting the factory spark plug and wiring harness layout.

How will these coils affect starting and rough-idle issues?

Replacing damaged or fatigued coils often returns a crisp start and smoother idle by restoring consistent spark strength to each cylinder. You should notice reduced cranking time and fewer misfires once all affected coils are swapped.

• Direct-fit electrical and mounting compatibility with listed models
• Restores consistent spark delivery to each cylinder
• Helps clear misfire-related trouble codes when used to replace bad coils

What vehicles and engine types does this MAS coil set fit?

This kit fits a defined range of mid-2000s GM and Isuzu vehicles with naturally aspirated 3.5L or 3.7L engines. Confirm fitment by cross-checking your year, make, model and engine size or by comparing the interchange part numbers supplied.

• 2004–2006 Chevrolet Colorado 3.5L L5 (naturally aspirated)
• 2004–2006 GMC Canyon 3.5L L5 (naturally aspirated)
• 2006 Hummer H3 and 2006 Isuzu i-350 (3.5L L5), 2007–2008 Isuzu i-370 (3.7L L5)
• Cross-references include UF303, C1395, E255 and several OEM interchange numbers

Are these coils easy to install and what should I check first?

Installation is straightforward for anyone comfortable with basic engine work — coils plug into the factory harness and bolt to the cylinder head in the original locations. Before installing, verify the part numbers and inspect the spark plugs and wiring; replacing coils on worn plugs can mask remaining issues.

• Bolts and connectors match OE locations for bolt-on replacement
• Recommended to inspect or replace spark plugs when changing coils
• Use an OBD-II scanner to clear codes and confirm repair after installation

What durability and warranty information comes with this MAS set?

The coils are manufactured to resist the heat and vibration typical of under-hood environments and are intended as a functional aftermarket replacement. MAS backs this product with a one-year warranty from the purchase date for added peace of mind.

• Designed for engine bay thermal and vibration conditions
• Includes commonly used compatible part numbers for cross-reference
• One-year limited warranty from date of purchase

Who is this for: This MAS five-coil pack is aimed at vehicle owners and independent mechanics repairing mid-2000s Chevrolet Colorado, GMC Canyon, Hummer H3, and Isuzu i-350/i-370 V6 engines that show erratic ignition, misfires, rough idle, or check-engine codes linked to coil failure. It’s also useful as a preventative service item when restoring multi-cylinder ignition performance and fuel efficiency. Always double-check fitment by year/make/model and the listed interchange numbers before ordering.