LR4 Wire Harness

The 4.8 (4800) 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 to run 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, diagnostics. 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 4.8 (4807CC)
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 83.00mm, with a stationary 2 valves per cylinder.
Rocker arm ratio 1.7.

The Horsepower is 275 HP @ 5200 RPM. The following vehicles are rated
Chevy Express 2500/3500 Series.
Chevy Tahoe, (2500/3500 Series)
& GMC Yukon, GMC Savana.

The Torque is rated at 290 ft-lb@4000 RPM. For all models.
The GMC Savana,
Chevy Express, Tahoe,
No doubt, all Sliverado, GMC Sierra (2500/3500 Series) have 275 ft-lb of Torque @ 5200.

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.

LQ4 Wire Harness

LQ4 Wire Harness

The LQ4 / Vin U / 6000 engine is an awesome GM power-plant, similarly related, by looks, to the 4.8 LR4 & 5.3 LM7 but is massively in a class of it 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 horse power 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.

The displacement of the engine is 6.0 (5967CC).

Compression ration is 9.4 to 1.
Firing order is 1-8-7-2-6-5-4-3.
Bore and (X) stroke is 101.60 X 92.00mm, with a stationary 2 valves per cylinder.
Rocker arm ratio 1.7.

Horse power and Torque for the GMC Sierra Denali is 325 HP @ 5000
Torqe 370 ft-lb @ 4000 RPM

Horse power and Torque for the Chevy Express, 3500 series, 2500 HD & 3500 GMC Savana, Silverado pickup, GMC Sierra and Crewcab.
300 hp @ 4400 RPM
360 ft-lb @ 4000 RPM

H2 Horse power and Torque
315 HP @ 5000 RPM
360 ft-lb @ 4000 RPM

Horse power and Torque for the Suburban, Denali, Yukon XL/XL and GMC Yukon Denali.
320 HP @ 5000 RPM
370 ft-lb @ 4000 RPM