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To identify which LS engine that you have, you must have the VIN # and/or the RPO code from the glove box sticker. The 8th character in the VIN # identifies which engine you have.

Note 1: depending upon vehicle application (truck, suv, car); horsepower, torque, and fuel requirements will vary. VIN code indicating engine RPO is usually not consistent between vehicle types (cars or trucks) or years. with few exceptions, RPM redline is generally 6000 or higher

Note 2: block features are generally dependent upon the Generation but are not always built-in. typical features are AFM (Advanced Fuel Management), VVT (Variable Valve Train), Front Wheel Drive (FWD) and other improvements. features marked with an * indicate that only certain model years have that feature

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[27] 3.90 3.62 10.25:1 Aluminum
III 2001-05 LS6 (S) 385-405 @ 6000 385-400 @ 4800 5.7 3.90 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 6.0 4.00 3.62 9.4:1 Iron/Iron-Alum. heads
III 2002-07 LQ9 (N) 345 @ 5200 380 @ 4000 6.0 4.00 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 sodium exhaust valves
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 6.0 4.00 3.62 10.4:1 Aluminum AFM
IV 2011-16 L77 (2) 362 @ 5700 391 @ 4400 6.0 E85-capable 4.00 3.62 10.4:1 Aluminum AFM
IV 2010-17 L96 (G) 322-360 @ 4400-5400 373-382 @ 4200-4400 6.0 E85-capable 4.00 3.62 9.7:1 Iron/Alum. heads VVT
IV 2009-10 L98 (H) 362 @ 5700 391 @ 4400 6.0 4.00 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 3.78 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 6.0 93 4.00 3.62 10.9:1 Aluminum
IV 2007-10 LY6 (K) 361 @ 5600 385 @ 4400 6.0 4.00 3.62 9.67:1 Iron/Alum. heads VVT
IV 2008-09 LFA (5) 332 @ 5100 367 @ 4100 6.0 Hybrid 4.00 3.62 10.8:1 Aluminum AFM
IV 2010-12 LZ1 (J) 332 @ 5100 367 @ 4100 6.0 Hybrid 4.00 3.62 10.8:1 Aluminum AFM, VVT
IV 2009-13 LS9 (R/T) 638 @ 6500 604 @ 3800 6.2 92 4.065 3.62 9.1:1 Aluminum/Alum. heads sodium exhaust valves, 6600 redline, ZR1
IV 2006-15 LS7 (E) 505 @ 6300 470 @ 4800 7.0 91 4.125 4.00 11.0:1[29] Aluminum 7000 redline, sodium exhaust valves
IV/V none LSX376 450 @ 5900 444 @ 4600 6.2 92 4.06 3.62 9:1 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[30]
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 10:1 Aluminum/Alum. heads DI, 2.3L supercharger
V 2018–present LT5 755 @ 6400 715 @ 3600 6.2 4.06 3.62 10:1 Aluminum/Alum. heads VVT, hybrid DI, 2.6L supercharger, ZR1
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
V 2020– L8T 401 @ 5200 464 @ 4000 6.6 87 4.06 3.85 10.5:1 Iron/Alum. heads VVT

 

CourtesCourtesy of Wikipedia

October 12, 2019 — Joseph Losco