Ignition Coil & Spark Plugs for Chevrolet Suburban 2500 GMC Yukon XL 2500 (2001-2002) 8.1L V8
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High-Output Ignition Coil & Spark Plugs for 2001-2002 Chevrolet, GMC Suburban, Yukon 2500
What it Does: This complete 24-piece ignition kit replaces degraded OEM coils, wires, and spark plugs to restore optimal spark energy and eliminate misfires on heavy-duty 8.1L V8 applications.
The Stock Suburban, Yukon Ignition Degradation
The factory ignition system on the GMT800 chassis equipped with the Vortec 8100 L18 V8 is notorious for thermal degradation. Because the heavy-duty 8.1L generates immense engine bay temperatures during towing or hauling operations, the OEM coil packs and spark plug wires suffer from accelerated heat soak. Over time, the factory wire coating hardens and cracks, creating pinhole leaks that lead to voltage bleed-off, erratic misfires, rough idling, and diminished fuel economy. Additionally, failing coils force the engine to pull timing, severely limiting the low-end torque these 3/4-ton trucks rely on.
The Engineering Solution
This comprehensive ignition system upgrade targets the root cause of spark blowout and thermal failure. The newly redesigned coil packs utilize high-grade copper windings and premium epoxy potting to isolate internal components from extreme engine heat, ensuring consistent high-energy output. Paired with upgraded spark plug wires featuring a thick, temperature-resistant silicone jacket, this kit actively resists cracking and dielectric breakdown. By delivering a concentrated, high-voltage spark directly to the combustion chamber, this system eliminates misfires, stabilizes idle quality, and restores maximum voltage under heavy engine loads.
Technical Specifications
| Fitment | 2001-2002 Chevrolet, GMC Suburban 2500, Yukon XL 2500 |
| Engine / Chassis | Vortec 8100 L18 V8 / GMT800 (GMT830) |
| Stock Output | 340 hp / 455 lb-ft (Approx) |
| Part Number | D580, 5C1078, 12556450, 12558948, UF192 |
Compatibility
- 2001 Chevrolet Suburban 2500 8.1L V8
- 2002 Chevrolet Suburban 2500 8.1L V8
- 2001 GMC Yukon XL 2500 8.1L V8
- 2002 GMC Yukon XL 2500 8.1L V8
The Chevrolet, GMC Hauling Caliber
Built for the severe demands of heavy-duty hauling, upgrading your ignition system ensures your 3/4-ton SUV maintains uncompromised reliability, stable idling, and consistent towing power, even on the steepest grades.
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