Chevrolet Silverado HD Engines by Year

Chevrolet's heavy-duty Silverado pickups, the 2500HD and 3500HD, arrived with the 2001 GMT800 trucks; the 1999–2000 light-duty Silverado 2500 is included. The 3500 shares the 2500's engines, sometimes at lower ratings for the heaviest models.

Pick a year to see every engine offered that model year, with its code, rated horsepower and the trims it came in. Each engine links to its full specs.

Jump to a year

GMT800: 1999 · 2000 · 2001 · 2002 · 2003 · 2004 · 2005 · 2006 · 2007

GMT900: 2008 · 2009 · 2010 · 2011 · 2012 · 2013 · 2014

K2XX: 2015 · 2016 · 2017 · 2018 · 2019

T1: 2020 · 2021 · 2022 · 2023 · 2024 · 2025 · 2026

GMT800 (1999–2007)

The 6.0 and 8.1 Vortec V8s and the Duramax diesel: the LB7, then the LLY for 2004.5–2005 and the LBZ from 2006.

1999 Silverado HD engines

Engine	Rated	Offered in
5.3L / 325 V8 (LM7)	270 hp net	Silverado 2500 (light-duty 3/4-ton, under 8,600 lb GVWR), 2WD and 4WD
6.0L / 364 V8 (LQ4)	300 hp net	Silverado 2500 (light-duty 3/4-ton), 2WD and 4WD

2000 Silverado HD engines

Engine	Rated	Offered in
5.3L / 325 V8 (LM7)	285 hp net	Silverado 2500 (light-duty 3/4-ton, under 8,600 lb GVWR), 2WD and 4WD
6.0L / 364 V8 (LQ4)	300 hp net	Silverado 2500 (light-duty 3/4-ton), 2WD and 4WD

2001 Silverado HD engines

Engine	Rated	Offered in
6.0L / 364 V8 (LQ4)	300 hp net	2500HD, 3500, 2500 (light-duty, 2001-2004), 2WD and 4WD
6.6L / 403 V8 diesel (LB7)	300 hp net	2500HD, 3500
8.1L / 496 V8 (L18)	340 hp net	2500HD, 3500

2002 Silverado HD engines

Engine	Rated	Offered in
6.0L / 364 V8 (LQ4)	300 hp net	2500HD, 3500, 2500 (light-duty, 2001-2004), 2WD and 4WD
6.6L / 403 V8 diesel (LB7)	300 hp net	2500HD, 3500
8.1L / 496 V8 (L18)	340 hp net	2500HD, 3500

2003 Silverado HD engines

Engine	Rated	Offered in
6.0L / 364 V8 (LQ4)	300 hp net	2500HD, 3500, 2500 (light-duty, 2001-2004), 2WD and 4WD
6.6L / 403 V8 diesel (LB7)	300 hp net	2500HD, 3500
8.1L / 496 V8 (L18)	340 hp net	2500HD, 3500

2004 Silverado HD engines

Engine	Rated	Offered in
6.0L / 364 V8 (LQ4)	300 hp net	2500HD, 3500, 2500 (light-duty, 2001-2004), 2WD and 4WD
6.6L / 403 V8 diesel (LB7)	300 hp net	2500HD, 3500
6.6L / 403 V8 diesel (LLY)	310 hp net	2500HD, 3500
8.1L / 496 V8 (L18)	—	2500HD, 3500

2005 Silverado HD engines

Engine	Rated	Offered in
6.0L / 364 V8 (LQ4)	300 hp net	2500HD, 3500, 2500 (light-duty, 2001-2004), 2WD and 4WD
6.6L / 403 V8 diesel (LLY)	310 hp net	2500HD, 3500

2006 Silverado HD engines

Engine	Rated	Offered in
6.0L / 364 V8 (LQ4)	300 hp net	2500HD, 3500, 2500 (light-duty, 2001-2004), 2WD and 4WD
6.6L / 403 V8 diesel (LBZ)	360 hp net	2500HD, 3500

2007 Silverado HD engines

Engine	Rated	Offered in
6.0L / 364 V8 (LQ4)	300 hp net	2500HD, 3500, 2500 (light-duty, 2001-2004), 2WD and 4WD
6.0L / 364 V8 (LY6)	353 hp net	2500HD, 3500HD, 2WD and 4WD
6.6L / 403 V8 diesel (LBZ)	360 hp net	2500HD, 3500
6.6L / 403 V8 diesel (LMM)	365 hp net	2500HD, 3500HD
8.1L / 496 V8 (L18)	330 hp net	2500HD, 3500

GMT900 (2008–2014)

The 6.0 V8 and the LMM and then LML Duramax.

2008 Silverado HD engines

Engine	Rated	Offered in
6.0L / 364 V8 (LY6)	353 hp net	2500HD, 3500HD, 2WD and 4WD
6.6L / 403 V8 diesel (LMM)	365 hp net	2500HD, 3500HD

2009 Silverado HD engines

Engine	Rated	Offered in
6.0L / 364 V8 (LY6)	360 hp net	2500HD, 3500HD, 2WD and 4WD
6.6L / 403 V8 diesel (LMM)	365 hp net	2500HD, 3500HD

2010 Silverado HD engines

Engine	Rated	Offered in
6.0L / 364 V8 (L96)	360 hp net	2500HD, 3500HD, 2WD and 4WD
6.6L / 403 V8 diesel (LMM)	365 hp net	2500HD, 3500HD

2011 Silverado HD engines

Engine	Rated	Offered in
6.0L / 364 V8 (L96)	360 hp net	2500HD, 3500HD, 2WD and 4WD
6.6L / 403 V8 diesel (LML)	397 hp net	2500HD, 3500HD

2012 Silverado HD engines

Engine	Rated	Offered in
6.0L / 364 V8 (L96)	360 hp net	2500HD, 3500HD, 2WD and 4WD
6.6L / 403 V8 diesel (LML)	397 hp net	2500HD, 3500HD

2013 Silverado HD engines

Engine	Rated	Offered in
6.0L / 364 V8 (L96)	360 hp net	2500HD, 3500HD, 2WD and 4WD
6.6L / 403 V8 diesel (LML)	397 hp net	2500HD, 3500HD

2014 Silverado HD engines

Engine	Rated	Offered in
6.0L / 364 V8 (L96)	360 hp net	2500HD, 3500HD, 2WD and 4WD
6.0L / 364 V8 (LC8)	360 hp net	2500HD (bi-fuel CNG option)
6.6L / 403 V8 diesel (LML)	397 hp net	2500HD, 3500HD

K2XX (2015–2019)

The 6.0 V8 and the LML, then the L5P Duramax from 2017.

2015 Silverado HD engines

Engine	Rated	Offered in
6.0L / 364 V8 (L96)	360 hp net	2500HD, 3500HD, 2WD and 4WD
6.0L / 364 V8 (LC8)	360 hp net	2500HD (bi-fuel CNG option)
6.6L / 403 V8 diesel (LML)	397 hp net	2500HD, 3500HD

2016 Silverado HD engines

Engine	Rated	Offered in
6.0L / 364 V8 (L96)	360 hp net	2500HD, 3500HD, 2WD and 4WD
6.0L / 364 V8 (LC8)	360 hp net	2500HD (bi-fuel CNG option)
6.6L / 403 V8 diesel (LML)	397 hp net	2500HD, 3500HD

2017 Silverado HD engines

Engine	Rated	Offered in
6.0L / 364 V8 (L96)	360 hp net	2500HD, 3500HD, 2WD and 4WD
6.0L / 364 V8 (LC8)	360 hp net	2500HD (bi-fuel CNG option)
6.6L / 403 V8 diesel (L5P)	445 hp net	2500HD, 3500HD

2018 Silverado HD engines

Engine	Rated	Offered in
6.0L / 364 V8 (L96)	360 hp net	2500HD, 3500HD, 2WD and 4WD
6.0L / 364 V8 (LC8)	360 hp net	2500HD (bi-fuel CNG option)
6.6L / 403 V8 diesel (L5P)	445 hp net	2500HD, 3500HD

2019 Silverado HD engines

Engine	Rated	Offered in
6.0L / 364 V8 (L96)	360 hp net	2500HD, 3500HD, 2WD and 4WD
6.6L / 403 V8 diesel (L5P)	445 hp net	2500HD, 3500HD

T1 (2020–2026)

The 6.6 gasoline V8 and the L5P Duramax, uprated for 2024.

2020 Silverado HD engines

Engine	Rated	Offered in
6.6L / 401 V8 (L8T)	401 hp net	2500HD, 3500HD, 2WD and 4WD
6.6L / 403 V8 diesel (L5P)	445 hp net	2500HD, 3500HD

2021 Silverado HD engines

Engine	Rated	Offered in
6.6L / 401 V8 (L8T)	401 hp net	2500HD, 3500HD, 2WD and 4WD
6.6L / 403 V8 diesel (L5P)	445 hp net	2500HD, 3500HD

2022 Silverado HD engines

Engine	Rated	Offered in
6.6L / 401 V8 (L8T)	401 hp net	2500HD, 3500HD, 2WD and 4WD
6.6L / 403 V8 diesel (L5P)	445 hp net	2500HD, 3500HD

2023 Silverado HD engines

Engine	Rated	Offered in
6.6L / 401 V8 (L8T)	401 hp net	2500HD, 3500HD, 2WD and 4WD
6.6L / 403 V8 diesel (L5P)	445 hp net	2500HD, 3500HD

2024 Silverado HD engines

Engine	Rated	Offered in
6.6L / 401 V8 (L8T)	401 hp net	2500HD, 3500HD, 2WD and 4WD
6.6L / 403 V8 diesel (L5P)	470 hp net	2500HD, 3500HD

2025 Silverado HD engines

Engine	Rated	Offered in
6.6L / 401 V8 (L8T)	401 hp net	2500HD, 3500HD, 2WD and 4WD
6.6L / 403 V8 diesel (L5P)	470 hp net	2500HD, 3500HD

2026 Silverado HD engines

Engine	Rated	Offered in
6.6L / 401 V8 (L8T)	401 hp net	2500HD, 3500HD, 2WD and 4WD
6.6L / 403 V8 diesel (L5P)	470 hp net	2500HD, 3500HD

Working on one of these engines?

• Engine displacement from bore and stroke
• Static and dynamic compression ratio
• Which camshaft for your build
• What size carburetor
• Horsepower to torque at any RPM
• Torque converter stall speed

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