Duramax HD

// Truck platform

DURAMAX HD

Chevy & GMC 2500/3500 HD

Pick your generation

Duramax 2024–2026 L5P Duramax 2024–2026 L5P 6.6L · L5P Duramax 2020–2023 L5P/L5D Duramax 2020–2023 L5P/L5D 6.6L · L5P/L5D Duramax 2017–2019 L5P/L5D Duramax 2017–2019 L5P/L5D 6.6L · L5P/L5D Duramax 2015.5–2016 LML Duramax 2015.5–2016 LML 6.6L · LML Duramax 2011–2015 LML Duramax 2011–2015 LML 6.6L · LML Duramax 2007.5–2010 LMM Duramax 2007.5–2010 LMM 6.6L · LMM Duramax 2006–2007 LBZ Duramax 2006–2007 LBZ 6.6L · LBZ Duramax 2004.5–2005 LLY Duramax 2004.5–2005 LLY 6.6L · LLY Duramax 2001–2004 LB7 Duramax 2001–2004 LB7 6.6L · LB7

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Duramax HD install guides

CAN TEST PLUGS — 17-23 DURAMAX 6.6L L5P 5 MIN · 3 steps Watch guide → 3.5" DOWN PIPE — 17-23 DURAMAX 6.6L L5P 40 MIN · 21 steps Watch guide → EFI LIVE FUSES — 01-10 DURAMAX 6.6L 10 MIN · 12 steps Read guide → EFI LIVE TUNING — 01-16 DURAMAX 6.6L 15 MIN · 10 steps Watch guide → EGR DELETE — 07.5-10 DURAMAX 6.6L LMM 3 HR · 41 steps Read guide → EGR DELETE — 11-16 DURAMAX 6.6L LML 30 MIN · 21 steps Watch guide → EGR DELETE — 17-19 DURAMAX 6.6L L5P 35 MIN · 29 steps Watch guide → EGR DELETE — 20-23 DURAMAX 6.6L L5P 35 MIN · 28 steps Watch guide → HP TUNERS UNLOCK, STOCK READ & TUNE LOAD — 17-23 DURAMAX L5P 30 MIN · 21 steps Watch guide → REASSEMBLY — 17-19 DURAMAX 6.6L L5P 25 MIN · 15 steps Read guide → REASSEMBLY — 20-23 DURAMAX 6.6L L5P 25 MIN · 13 steps Read guide → ROTARY SWITCH — 01-04 DURAMAX 6.6L LB7 15 MIN · 11 steps Read guide → ROTARY SWITCH — 04.5-05 DURAMAX 6.6L LLY 15 MIN · 14 steps Read guide → ROTARY SWITCH — 06-10 DURAMAX 6.6L LBZ/LMM 10 MIN · 8 steps Read guide →