Speed Scene Wiring
LR4 Wire Harness
4.8L Vortec standalone wire harness — emissions or no-emissions, marine-ready programming available. Full GM diagnostic capabilities. USA made since 1999.
Start a BuildLR4 4.8L Wire Harness
The 4.8 (4800) LR4 is a highly capable engine, great for mid-size engine compartments. The 4.8 and the 5.3 share the same block but the internals — crank and rods — are not the same. The intake is taught and ready for climbing. A taller plenum design / tunnel ram effect allows the air to hit the intake ports, yielding efficient power with a snap of torque.
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. If you decide to roll with the smaller ECM / VCM / PCM, you will lack the diagnostic capability.
LR4 Engine Specifications
- Displacement
- 4.8L (4806cc)
- Compression Ratio
- 9.5:1
- Firing Order
- 1-8-7-2-6-5-4-3
- Bore x Stroke
- 96.01 x 83.00mm
- Valves per Cylinder
- 2 (stationary)
- Rocker Arm Ratio
- 1.7
EPA Approved Checklist
- VSS Circuit
- Diagnostic Link Connector
- Correct Emissions Connectors
- VSS Pigtail
- Alternator
- Tach Pigtail
Ready to Build Your LR4 Harness?
Custom-built to your spec. Emissions or no-emissions. Marine-ready. USA made since 1999.
Start a Build