LM7 Wire Harness

LM7 Wire Harness

LM7 Wire Harness

The 5.3 (5300) is a highly capable engine, great for mid size engine compartments and is considerably smaller than the 6.0. The 4.8 and the 5.3 share the same block but the internals; crank, rods, are not. 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 (These are neat names for computers). You will lack the diagnostic capability.

The displacement of the engine is 5.3 (5328CC).
Compression ration is 9.45 to 1.
Firing order is 1-8-7-2-6-5-4-3.
Bore and (X) stroke is 96.01 X 92.00mm, with a stationary 2 valves per cylinder.
Rocker arm ratio 1.7.

Horse power of 285 HP @ 5200 RPM for the 5.3 engine produced by GM.
Cadillac Escalade GMC Sierra Tahoe
Suburban Yukon Chevy Silverado
Avalanche Yukon XL

The following are additional HP ratings of the 5.3 engine, specific to make and model. GMC Savana (1500/2500 series)
Chevy Express Are rated at 295 HP @ 5200 rpm
Only the Trail blazer and GMC Envoy XL, are rated at 290HP @ 5200 RMP
The Torque rating is 325 ft-lb @ 4000 RPM The Cadillac Escalade, GMC Sierra, Tahoe, Avalanche, Suburban, Silverado, Yukon, Yukon XL.

The following are additional Torque ratings of the 5.3 engine, specific to make and model.
Envoy XL, GMC Savana (1500/2500 series, TrailBlazer Chevy Express Are rated 330 ft-lb @ 4000 rpm.

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For special requests Contact SSW


VSS Circuit
Diagnostic Link Connector
Correct Connector for Emissions Components
VSS Pigtail
Tach Pigtail