Product Description
Genuine NGK TR5GP G-Power platinum spark plug with a tapered seat, sold individually — buy more and save (a V8 needs 8).
A fine-wire platinum center electrode and trapezoidal ground electrode deliver quick starts, stable idle and longer service life than copper; a popular stock-heat-range plug for GM LS V8 trucks, vans and SUVs.
Always verify specifications prior to installation.
Key Features
- Fine-wire platinum center electrode for durability and low required voltage
- Trapezoidal (V-trimmed) ground electrode for improved ignitability
- Tapered seat — no gasket; correct fit for GM LS and similar heads
- Genuine NGK OE quality
Technical Specifications
Brand: NGK
Part Type: G-Power Platinum Spark Plug
NGK Stock No: 3186
Thread: 14 mm
Reach: 17.5 mm (.708")
Hex: 16 mm (5/8")
Seat: Tapered
Tip: Projected
Terminal: Solid
Heat Range: 5
Resistor: Yes
Gap: 0.040 in (1.0 mm)
Common applications associated with this reference include:
| Chevrolet Silverado 1500–3500 Chevrolet Express 2500/3500 Chevrolet Tahoe / Suburban |
GMC Sierra 1500–3500 GMC Savana 2500/3500 GMC Yukon / Yukon XL |
Cadillac Escalade Ford Ranger 2.3 / 2.5 Many GM 4.8 / 5.3 / 6.0 / 6.2 V8 |
Spark plug fitment varies by engine and year. Confirm the correct plug for your application before ordering.
Cross-reference numbers are provided for identification purposes only.
Always confirm fitment using your vehicle's OEM part number, engine specification, and service data before ordering.
| NGK TR5GP / 3186 |
NGK Iridium TR5IX / 7397 |
NGK Copper TR5 / 2238 |
ACDelco / GM 19250962, 25164641 |
Champion / Autolite 7963 / APP5144 |
