Speed Scene Wiring
LQ4 Wire Harness
6.0L Vortec standalone wire harness — the foundation for a stroker build. Emissions or no-emissions, marine-ready programming available. USA made since 1999.
Start a BuildLQ4 / Vin U / 6.0L Wire Harness
The LQ4 / Vin U / 6000 engine is an awesome GM power-plant, similarly related by looks to the 4.8 LR4 and 5.3 LM7, but is massively in a class of its own. This engine is the foundation for a stroker motor, and when you need more room the LQ4 engine is the Suburban of the LS blocks. With a great engine builder, the sky is the limit for horsepower and torque — endless possibilities.
Speed Scene Wiring fabricates this fuel injected wire harness, with emissions or without. If you require this engine in a marine environment, we can accommodate with the correct computer program. The nice thing about running a SSW wire harness and GM electronics are diagnostic capabilities, great customer service, and a product that is Made in the USA.
LQ4 Engine Specifications
- Displacement
- 6.0L (5967cc)
- Compression Ratio
- 9.4:1
- Firing Order
- 1-8-7-2-6-5-4-3
- Bore x Stroke
- 101.60 x 92.00mm
- Valves per Cylinder
- 2 (stationary)
- Rocker Arm Ratio
- 1.7
Horsepower & Torque by Application
GMC Sierra Denali
325 HP @ 5000 RPM
370 ft-lb @ 4000 RPM
Chevy Express, Silverado, GMC Sierra, Crewcab, 2500 HD, 3500
300 HP @ 4400 RPM
360 ft-lb @ 4000 RPM
Hummer H2
315 HP @ 5000 RPM
360 ft-lb @ 4000 RPM
Suburban, Denali, Yukon XL, GMC Yukon Denali
320 HP @ 5000 RPM
370 ft-lb @ 4000 RPM
EPA Approved Checklist
- VSS Circuit
- Diagnostic Link Connector
- Correct Emissions Connectors
- VSS Pigtail
- Alternator
- Tach Pigtail
Ready to Build Your LQ4 Harness?
The stroker foundation. Custom-built to your spec. USA made since 1999.
Start a Build