Gen III/IV/V Years Offered Engine Code (vin code) Power (hp) Torque (lb.-ft.) Size (L) Fuel Type (E85/89/91/93) Bore (in) Stroke (in) Compression Ratio Block & Heads / Iron or Aluminum Block Features
III 1997-05 LS1 (G) 305-350 @ 5600 350-365 @ 4400 5.7 91[20] 3.9 3.62 10.25:1 Aluminum
III 2001-05 LS6 (S) 385-405 @ 6000 385-400 @ 4800 5.7 3.9 3.62 10.5:1 Aluminum
III 1999-07 LR4 (V) 255-285 285-295 4.8 3.78 3.3 9.45:1 Iron/Alum. heads
III 1999-07 LM7 (T) 270-295 315-335 5.3 3.78 3.62 9.49:1 Iron/Alum. heads
III 2002-07 L59 (Z) 285-295 320-335 5.3 E85-capable 3.78 3.62 9.9:1 Iron/Alum. heads
III 2003-04 LM4 (P) 290 325 5.3 3.78 3.62 10.0:1 Aluminum
III 2005-08 L33 (B) 310 @ 5200 335 @ 4400 5.3 3.78 3.62 10.0:1 Aluminum
III 1999-08 LQ4 (U) 300-325 @ 5200 360-370 @ 4400 6 4 3.62 10.0:1 Iron/Iron-Alum. heads
III 2002-07 LQ9 (N) 345 @ 5200 380 @ 4000 6 4 3.62 10.0:1 Iron/Alum. heads
IV 2008-17 LS3 (W) 426-436 @ 5900 420-428 @ 4600 6.2 93rec 4.06 3.62 10.7:1 Aluminum/Alum. heads
IV 2010-15 L99 (J) 400 @ 5900 410 @ 4300 6.2 E85-capable 4.06 3.62 10.4:1 Aluminum/Alum. heads AFM, VVT,
IV 2009-11 LSA (P) 556-580 @ 6100 551-556 @ 3800 6.2 93req 4.06 3.62 9.1:1 Aluminum/Alum. heads
IV 2010-12 L94 (F) 403 @ 5700 417 @ 4300 6.2 E85-capable 4.06 3.62 10.4:1 Aluminum/Alum. heads AFM, VVT
IV 2007-09 L76 (Y) 361-367 @ 5600 375-385 @ 4400 6 4 3.62 10.4:1 Aluminum AFM
IV 2011-16 L77 (2) 362 @ 5700 391 @ 4400 6 E85-capable 4 3.62 10.4:1 Aluminum AFM
IV 2010-17 L96 (G) 322-360 @ 4400-5400 373-382 @ 4200-4400 6 E85-capable 4 3.62 9.7:1 Iron/Alum. heads VVT
IV 2009-10 L98 (H) 362 @ 5700 391 @ 4400 6 4 3.62 10.4:1 Aluminum L76 with AFM hardware removed
IV 2007-09 LY2 (C) 260-295 295-305 4.8 3.78 3.3 9.08:1 Iron/Alum. heads no VVT
IV 2010-12 L20 (A) 260-302 @ 5400 295-305 @ 4600 4.8 E85-capable 3.78 3.3 8.8:1 Iron/Alum. heads no AFM, VVT
IV 2005-09 LH6 (M) 300-315 330-338 5.3 3.78 3.62 9.95:1 Aluminum AFM, VVT*
IV 2007-09 LY5 (J) 315-320 @ 5200 335-340 @ 4000 5.3 3.78 3.62 9.95:1 Iron/Alum. heads AFM, VVT*
IV 2008-12 LMG (0) 315-320 @ 5200 335-340 @ 4000 5.3 E85-capable 4 3.62 9.6:1 Iron/Alum. heads AFM, VVT*
IV 2007-12 LC9 (3) 315-320 @ 5400 335 @ 4000 5.3 E85-capable 3.78 3.62 9.95:1 Aluminum AFM, VVT*
IV 2005-09 LS4 (C) 303 @ 5600 323 @ 4400 5.3 3.78 3.62 10.0:1 Aluminum AFM, FWD
IV 2008-09 LH8 (L) 300 @ 5200 320 @ 4000 5.3 3.78 3.62 Aluminum
IV 2007-08 L92 (8) 403 415 6.2 4.06 3.62 10.5:1 Aluminum VVT
IV 2009-12 L9H (2) 403 415 6.2 E85-capable* 4.06 3.62 10.5:1 Aluminum VVT
IV 2005-07,09 LS2 (U) 390-400 @ 6000 400 @ 4400 6 93 4 3.62 10.9:1 Aluminum
IV 2007-10 LY6 (K) 361 @ 5600 385 @ 4400 6 4 3.62 9.67:1 Iron/Alum. heads VVT
IV 2008-09 LFA (5) 332 @ 5100 367 @ 4100 6 Hybrid 4 3.62 10.8:1 Aluminum AFM
IV 2010-12 LZ1 (J) 332 @ 5100 367 @ 4100 6 Hybrid 4 3.62 10.8:1 Aluminum AFM, VVT
IV 2009-13 LS9 (R/T)[21] 638 @ 6500 604 @ 3800 6.2 92 4.065 3.62 9.1:1 Aluminum/Alum. heads
IV 2006-15 LS7 (E) 505 @ 6300 470 @ 4800 7 91 4.125 4 11.0:1[22] Aluminum
IV/V none LSX376 450 @ 5900 444 @ 4600 6.2 92 4.06 3.62 9:01 Aftermarket
IV/V none LSX454 620 @ 6200 590 @ 4800 7.4 92 4.185 4.125 11.0:1 Aftermarket
IV/V none LSX454R 776 @ 7000 680 @ 4500 7.4 110 4.185 4.125 13.1:1 Aftermarket[23]
V 2014–present LT1 455-460 @ 6000 455-465 @ 4600 6.2 93rec 4.06 3.62 11.5:1 Aluminum/Alum. Heads
V 2015–present LT4 640-650 @ 6400 630-650 @ 3600 6.2 4.06 3.62 10:01 Aluminum/Alum. Heads
V 2014–present L83 (C) 355-376 @ 5600 383-416 @ 4100 5.3 E85-capable 3.78 3.62 11.0:1 Aluminum/Alum. heads
V 2014–present L86 (J) 420 @ 5600 460 @ 4100 6.2 NOT E85-capable 4.06 3.62 11.5:1 Aluminum/Alum. heads