[Gt1Street]

Engines

3.6L V-6 DI VVT (LLT)
6.2L V-8 (LS3, L99)

Application:
LS, LT
SS

Type:
3.6L V-6
6.2L V-8

Displacement (cu in / cc):
217 / 3564
376 / 6162

Bore & stroke (in / mm):
3.70 x 3.37 / 94 x 85.6
4.06 x 3.62 / 103.25 x 92

Block material:
cast aluminum w/ cast-in-place iron bore liners
cast aluminum w/ cast-in-place iron bore liners

Cylinder head material:
aluminum
aluminum

Valvetrain:
dual overhead camshafts, four valves per cylinder, continuously variable valve timing
valve-in-head; two valves per cylinder; roller lifters; Active Fuel Management (L99)

Ignition system:
electronic individual coil-on-plug; individual cylinder knock control and extended-life platinum-tipped spark plugs
high-energy distributorless ignition; solid state direct-fire ignition w/ coil near plug and integrated ignition

Fuel delivery:
direct high-pressure fuel injection
returnless, multi-port fuel injection

Compression ratio:
11.3:1
10.7:1

Horsepower
(hp / kW @ rpm):
300 / 224 @ 6400 rpm*
422 / 315 @ 5000 (LS3)*
400 / 299 @ 5000 (L99)*

Torque
(lb-ft / Nm @ rpm):
273 / 370 @ 5200 rpm*
408 / 553 @ 4500 (LS3)*
395 / 535 @ 4500 (L99)*

Recommended fuel:
regular unleaded
premium recommended

Maximum engine speed (rpm):
7000
6000 (L99)
6600 (LS3)

Emissions controls:
evaporative system, single close-coupled catalytic converter, equal-length exhaust, single underfloor catalytic converter, positive crankcase ventilation, intake and exhaust cam phasers, electronic throttle control
evaporative system, close-coupled catalytic converters, positive crankcase ventilation, electronic throttle control

Fuel economy (auto trans):
26 hwy (est)
23 hwy (est)