Rebuild Picks
Engines ranked by rebuild potential: parts, machine shop support, aftermarket, and community knowledge. Tiers are editorial opinion. Rebuild and upgrade content stays emissions-compliant; check local law.
| Tier | Engine | Years | Parts | Shop | Aftermkt | Community |
|---|---|---|---|---|---|---|
| Tier A | Cummins 6BT 5.9L 12-valve | 1989–1998 | ||||
| Tier A | Cummins ISB 5.9L 24-valve | 1998–2007 | ||||
| Tier A | Duramax 6.6L LB7 V8 | 2001–2004 | ||||
| Tier A | Duramax 6.6L LBZ V8 | 2006–2007 | ||||
| Tier A | Ford 7.3L Power Stroke V8 | 1994–2003 | ||||
| Tier B | Cummins ISB 6.7L | 2007–2026 | ||||
| Tier B | Duramax 6.6L LMM V8 | 2007–2010 | ||||
| Tier B | Ford 6.7L Power Stroke V8 | 2011–2026 | ||||
| Tier B | Duramax 6.6L LLY V8 | 2004–2006 | ||||
| Tier B | Ford 6.0L Power Stroke V8 | 2003–2007 | ||||
| Tier B | Duramax 6.6L L5P V8 | 2017–2026 | ||||
| Tier B | International 7.3L IDI V8 | 1989–1994 | ||||
| Tier C | Duramax 6.6L LML V8 | 2011–2016 | ||||
| Tier C | Ford 6.4L Power Stroke V8 | 2008–2010 | ||||
| Tier C | GM 6.2L Detroit Diesel V8 | 1989–1993 | ||||
| Tier C | GM 6.5L Detroit Diesel V8 (naturally aspirated) | 1994–1995 | ||||
| Tier C | GM 6.5L Turbo Detroit Diesel V8 | 1992–2000 |