Best Spark Plugs For GMC Yukon Denali

I’ve spent countless hours wrenching on these big SUVs, and when it comes to keeping a powerhouse like the Denali running smoothly, the choice of ignition components is critical. Finding the Best Spark Plugs For GMC Yukon Denali means balancing immediate power delivery with long-term reliability and fuel economy. I’m going to walk you through the top tested options, ensuring your Denali performs exactly how it should, whether you’re towing a boat or just cruising the neighborhood.

IMAGE	PRODUCT NAME	AMAZON LINK
	NGK G-Power Platinum Spark Plug TR5GP (8 Pack) for GMC…	View on Amazon
	41-114 Iridium Spark Plugs and Wires Set for Chevy 5.3L…	View on Amazon
	NGK G-Power Platinum Spark Plug TR5GP (8 Pack) for GMC…	View on Amazon
	JDMSPEED High Performance Spark Plug Ignition Wire for…	View on Amazon
	8 Pcs Spark Plug Wires Set & 41-110 Iridium Spark…	View on Amazon
	TICANEE Iridium Spark Plugs and Wires Set for Chevy 5.3L…	View on Amazon
	8Pcs 41-110 Iridium Spark Plugs & M8-48322 10.4mm Silicone…	View on Amazon

NGK G-Power Platinum Spark Plug TR5GP (8 Pack) for GMC YUKON DENALI 2007-2014 6.2L/376

If you own a slightly older Denali (Gen III/IV platform) powered by the robust 6.2L V8, these NGK G-Power plugs are a fantastic choice for reliable, sustained performance. They offer a significant upgrade over standard copper plugs thanks to the fine wire platinum tip, which ensures a precise spark and quicker throttle response. The design utilizes copper in the core to effectively dissipate heat, which is essential for these high-displacement truck engines, helping to maintain performance even under heavy load.

Key features that stand out:
– Fine Wire Platinum Tip: Reduces the required voltage for ignition, leading to superior acceleration and better starts.
– Trivalent Metal Plating: Provides excellent anti-corrosion and anti-seizing protection, making future replacements much easier.
– Pure Alumina Silicate Ceramic Insulator: Ensures superior strength and prevents heat-related failure.

Pros:
– OEM quality and reliable performance for the 6.2L engine.
– Excellent anti-seizing properties.
– Improves fuel economy and starting reliability.
Cons:
– Platinum typically requires replacement sooner than Iridium options.

Best for: Denali owners with 2007-2014 6.2L engines seeking premium, reliable, and affordable platinum performance.

Expert Opinion: This plug is a tried-and-true workhorse for the older LS-based engines. NGK’s consistent quality ensures you get excellent spark efficiency without breaking the bank.

41-114 Iridium Spark Plugs and Wires Set for Chevy 5.3L 6.2L 4.8L 6.0L, 2014-2024 SparkPlugs Compatible with GMC Yukon Sierra Silverado 1500 Suburban Tahoe 12622441

For those driving the newer generation Denali (2014 onward), this combined Iridium plug and wire set is a powerful choice for maximizing engine efficiency and longevity. The 41-114 plug is often the factory-recommended replacement, delivering impressive durability thanks to its dual platinum tip and Iridium core. Because this set includes high-performance 10.5mm wires, you get the benefit of lower resistance and reduced radio frequency interference (RFI), ensuring a clean, strong spark every time.

Key features that stand out:
– Dual Platinum Tip: Extends the service life, providing up to 100,000 miles before replacement is needed.
– Complete Kit: Includes 8 plugs and 8 high-performance wires, simplifying the replacement process.
– Pre-Gapped: Ready for direct, plug-and-play installation, saving significant time during service.

Pros:
– Exceptionally long service life and high durability.
– High-performance wires enhance ignition efficiency.
– Ideal compatibility for late-model Denali and Yukon XL models (Gen V engine).
Cons:
– Premium price reflects the inclusion of both plugs and high-quality wires.

Best for: Newer Denali owners (2014+) looking for a comprehensive, 100,000-mile ignition system overhaul.

Expert Opinion: When dealing with modern, highly tuned Gen V engines, using the correct OE-spec Iridium plug like the 41-114 combined with new wires is the best long-term strategy for maintaining peak performance.

NGK G-Power Platinum Spark Plug TR5GP (8 Pack) for GMC YUKON XL 1500 SLT 2000-2014 5.3L/325

This is the sister plug to the 6.2L version, specifically tailored for the highly common 5.3L V8 engine found in many Yukon and Denali models between 2000 and 2014. Just like the 6.2L version, the TR5GP utilizes a fine wire platinum center electrode to enhance ignition power and improve cold starting. If your 5.3L engine is starting to feel sluggish or is experiencing misfires, these plugs are an affordable way to restore factory-level performance and improve gas mileage immediately.

Key features that stand out:
– Engine-Specific Fitment: Perfectly designed and heat-rated for the 5.3L LS engine family.
– Corrugated Ribs: Prevents electrical flashover, ensuring the spark goes exactly where it’s supposed to.
– Copper Core: Aids heat removal, crucial for preventing pre-ignition in hotter climates or during heavy towing.

Pros:
– Excellent fit and function for the 5.3L engine.
– Offers superior performance and longevity compared to standard nickel plugs.
– Helps maximize fuel economy.
Cons:
– Doesn’t provide the absolute longest service interval compared to Iridium.

Best for: 5.3L Denali owners (pre-2015) seeking a high-quality, reliable platinum plug replacement.

Expert Opinion: The TR5GP line offers unmatched stability for the older V8 platforms. For general maintenance and reliability, especially on higher-mileage 5.3L trucks, these are a top recommendation.

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

Sometimes, the spark plugs themselves are fine, but the wires are degrading, leading to energy loss and misfires. This JDMSPEED set focuses entirely on delivering maximum energy from the coil to the plug. Featuring a massive 10.2mm spiral wound design and an Ultra-Low Resistance KEVLAR Core, these wires are designed for performance applications, minimizing resistance to provide a powerful, consistent spark. They utilize high-temp silicone boots, giving them excellent protection against the intense heat generated by the Denali’s V8 engine bay.

Key features that stand out:
– 10.2mm Spiral Wound Design: Significantly reduces electrical resistance for a stronger spark.
– Ultra-Low Resistance KEVLAR Core: Ensures durability and excellent conductivity.
– High Strength/High Temp Silicone Boots: Offers superior heat protection and prevents arching.

Pros:
– Dramatically improves spark delivery when paired with good plugs.
– Extremely resistant to heat and wear.
– Great performance upgrade for tuned engines.
Cons:
– This is a wire-only kit, requiring separate spark plug purchase.

Best for: Owners of older Denalis looking to pair high-quality Iridium or Platinum plugs with high-performance wires for maximum output.

Expert Opinion: Don’t underestimate the impact of high-quality wires. If you’re replacing plugs, especially on a performance V8, upgrading to low-resistance wires like these ensures you’re getting the full benefit of your new spark plugs.

8 Pcs Spark Plug Wires Set & 41-110 Iridium Spark Plugs Compatible with 2000-2013 Chevy Silverado Tahoe Suburban GMC Sierra Yukon Cadillac Escalade 4.8 5.3 6.0 6.2 L, Replace for 41-162 9748HH 9748UU

This kit is designed to be the ultimate compatibility solution for nearly all Gen III and Gen IV LS-based engines found in Denalis from 2000 through 2013, covering 4.8L up to the 6.2L V8. Using the popular 41-110 Iridium plug (a known high-performance OE replacement), this set is engineered to bring reliable, long-lasting ignition to a wide range of model years. The Iridium construction provides superior resistance to fouling and spark erosion compared to older platinum options.

Key features that stand out:
– Wide Compatibility: Covers almost all V8 Denali models built between 2000 and 2013.
– 41-110 Iridium Plugs: Highly recognized OE part number replacement for reliable, efficient ignition.
– Pre-Gapped (0.04″): Ready for immediate installation, optimized for consistent performance.

Pros:
– Excellent longevity due to iridium composition.
– Complete set of plugs and wires included.
– Great value package for comprehensive maintenance.
Cons:
– The included wires are standard replacements, not specialized performance wires.

Best for: Owners of Denalis between 2000-2013 needing a complete, high-quality, long-life ignition tune-up kit.

Expert Opinion: The 41-110 plug is an industry standard for these LS engines because of its durability. Combining it with a new wire set is smart preventative maintenance, especially on higher-mileage vehicles.

TICANEE Iridium Spark Plugs and Wires Set for Chevy 5.3L Silverado 1500 Suburban Avalanche Tahoe 4.8L 6.0L, 41-110 Spark Plugs Compatible with GMC Yukon Sierra 12621258

Focusing heavily on the durability promised by Iridium technology, this TICANEE kit assures up to 100,000 miles of service life. This kit specifically targets the highly common 5.3L V8 used across the Yukon line. Like similar options, it utilizes the reliable 41-110 Iridium plug, which lowers the required ignition demand voltage. The pure copper core design within the plug helps manage heat effectively, ensuring that the electrode temperature remains cool enough to resist fouling and maximize lifespan.

Key features that stand out:
– 100,000-Mile Service Life: Dual Iridium tip construction provides exceptional longevity.
– Excellent Durability: Built with a pure copper core for enhanced heat management and fouling resistance.
– 24 Months Guarantee: Provides confidence in the product quality and reliability.

Pros:
– Outstanding warranty and guaranteed long life.
– Effective at improving gas mileage over worn-out components.
– Direct replacement for OE specifications (41-110).
Cons:
– Primarily marketed toward the 5.3L engine, though compatible with others.

Best for: Value-driven Denali owners who prioritize the longest possible replacement interval and a strong product guarantee.

Expert Opinion: The dual iridium technology is key here. It provides exceptional resistance to the harsh combustion environment, making this set a true fit-it-and-forget-it solution for years of hassle-free driving.

8Pcs 41-110 Iridium Spark Plugs & M8-48322 10.4mm Silicone Spark Plug Wires Compatible with Chevy Silverado Suburban Tahoe, GMC Envoy Sierra Savana Yukon, Cadillac, Hummer, 5.3L 6.0L 6.2L V8 LS Truck

If you want the best of both worlds—the durability of the 41-110 Iridium plug and the performance enhancement of upgraded wires—this kit is a standout choice. It pairs the dependable Iridium plugs with robust 10.4mm silicone spark plug wires. The enhanced size and silicone jacket of the wires ensure improved conductivity and better heat management than standard OE wires, leading to superior ignition performance, especially during harsh weather or high-load situations.

Key features that stand out:
– 10.4mm Silicone Wires: Offers significant improvement over stock wires in conductivity and heat resistance.
– Enhanced Ignition Performance: Finer iridium electrode promotes better fuel combustion and efficiency.
– One Year Quality Support: Provides assurance of reliability and durability.

Pros:
– Combines ultra-durable plugs with performance wires.
– Seamless replacement for original equipment, ensuring precise fit.
– Improves efficiency and offers more reliable starts.
Cons:
– The thick 10.4mm wires might require slightly careful routing in tight spots.

Best for: Denali owners seeking a complete high-performance upgrade that maximizes spark energy and plug life simultaneously.

Expert Opinion: This is the preferred setup for those who treat their Denali like a truck—towing often or driving in extreme conditions. The thick silicone wires and Iridium plugs handle heat and high demands seamlessly.

Helpful Comparison Insights

When choosing the right spark plugs for your GMC Yukon Denali, the biggest decision usually comes down to technology and vehicle year.

For Denalis built before 2014 utilizing the Gen III/IV LS engines (5.3L and 6.2L), you have excellent choices: the NGK Platinum TR5GP series offers reliable, high-quality performance at a lower price point than Iridium, but requires replacement around 50,000 miles.

If you’re driving a newer Denali (2014+) with the Gen V engine, the 41-114 Iridium Plugs and Wires Set is essentially the gold standard. Iridium handles the intense heat of modern direct-injected engines better and is designed to last 100,000 miles or more.

For older models (2000-2013), the 41-110 Iridium kits (offered by 8 Pcs and TICANEE) are great value, as they provide that 100,000-mile service interval and include new wires.

Finally, remember that the plug wires are crucial. If you opt for a plug-only kit, consider adding high-quality, low-resistance wires like the JDMSPEED or the 10.4mm wires found in the final reviewed kit, as they significantly boost ignition efficiency and reduce the risk of power loss.

Final Verdict

Choosing the right components depends entirely on your Denali’s vintage and your driving goals.

The Longevity Champion: If you want the longest possible service interval and drive a newer (2014+) Denali, the 41-114 Iridium Spark Plugs and Wires Set is the undisputed winner. It’s a guaranteed 100k-mile solution.

The Best All-Around Value (Older Denali): For the pre-2014 V8s (5.3L/6.2L), the combined 8 Pcs Spark Plug Wires Set & 41-110 Iridium Spark Plugs offers the best balance of iridium longevity and cost-effectiveness in a single package.

The Budget-Conscious Performer: If you have an older Denali and prefer OEM-style platinum reliability and a lower initial investment, the NGK G-Power Platinum Spark Plug TR5GP (ensure you choose the correct 5.3L or 6.2L version) will restore performance beautifully.

Comprehensive FAQ on the Best Spark Plugs for GMC Yukon Denali

Q1: Why is the Denali’s engine type (5.3L vs 6.2L) important when choosing plugs?

A: Both the 5.3L and 6.2L are part of the GM LS engine family, but the higher-output 6.2L engine (especially in Denali trim) typically runs hotter and may have different compression ratios. While they often use similar plug sizes, the manufacturer heat range for the spark plug must be correctly matched to the engine size and year to prevent issues like pre-ignition or fouling. Always check the specific fitment for your engine displacement (e.g., the NGK TR5GP comes in specific part numbers for the 5.3L and 6.2L).

Q2: What is the recommended spark plug gap for a GMC Yukon Denali?

A: The recommended gap size varies significantly depending on the model year and engine (LS vs. Gen V). Generally, most V8 Denalis use a gap around 0.040 inches (1.0mm), especially for Iridium plugs like the 41-110 and 41-114. However, you should always confirm the exact specification in your owner’s manual or on your vehicle’s emissions label. While many Iridium plugs are “pre-gapped,” it’s wise to double-check before installation.

Q3: How often should I replace the spark plugs in my Yukon Denali?

A: Replacement intervals depend heavily on the plug material. Standard copper plugs need replacement every 30,000 miles. Platinum plugs (like NGK G-Power) are usually rated for 45,000 to 60,000 miles. Iridium spark plugs (like the 41-110 and 41-114) are considered long-life and are often recommended for replacement every 100,000 miles. If you frequently tow heavy loads or use low-quality fuel, consider shortening these intervals slightly.

Q4: Should I choose Iridium or Platinum plugs for my Denali?

A: Iridium is generally the superior choice for the GMC Yukon Denali. Iridium is harder and melts at a much higher temperature than platinum, allowing for a finer electrode tip that provides a more focused spark and lasts up to twice as long. Platinum is a great, reliable mid-range choice, offering better performance than copper without the highest price tag of Iridium. For modern engines, Iridium delivers the best efficiency and longevity.

Q5: What are the signs that my spark plugs need replacing?

A: Common symptoms indicating that your spark plugs are worn include: Engine misfires or rough idling, especially when cold; poor acceleration or sluggish performance; a noticeable drop in gas mileage; difficulty starting the vehicle; or the Check Engine Light (CEL) illuminating due to a detected misfire code.

Q6: Do I need to replace the spark plug wires too?

A: It is highly recommended to replace the plug wires when you replace your spark plugs, especially on older models or when reaching the 100,000-mile mark. Wires degrade over time due to heat and age, losing resistance and leading to a weaker spark (or “crossfire”). Replacing the wires ensures the full energy from the coil reaches the new spark plug, maximizing your engine’s efficiency and performance.

Q7: Can I use performance spark plugs if I tow heavy loads with my Denali?

A: Yes, but you must stick to the recommended heat range. Performance plugs often utilize Iridium or fine-wire technology, which improves spark efficiency—beneficial for towing. However, avoid “colder” plugs unless your engine is heavily modified (e.g., supercharged), as an overly cold plug can foul easily in a stock or mildly tuned Denali engine. Focus on high-durability iridium plugs paired with quality, low-resistance wires.