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2000 – 2006
The original, continued: GM's ownership of the brand changed the H1's name and its marketing, not its manufacture: the vehicle went on being built in the military plant at Mishawaka, beside the Humvees, on AM General's line. The marque archive's build table gives the GM-era course year by year: 1,333 built for model year 2000, the strongest year of the vehicle's life after 1995; then 869 in 2001, 704 in 2002, 494 in 2003 (112 of them for the Border Patrol), and 252 in 2004. There was no 2005 model year at all — the line paused while the final version was prepared.
The Alpha: The final H1 was the Alpha, and it was a different machine under the familiar body: GM's 6.6-litre Duramax diesel and Allison 1000 transmission in place of the old 6.5. The Alpha was built in two waves — 448 from January to May 2005 and 281 from September 2005 to May 2006 — 729 in all, as the 2006 model year. It was the most capable H1 built and the smallest-selling proposition of the line's last years: a hand-built truck at a hand-built price, in a market that had moved on to the H2 and H3. The whole civilian H1 run, 1992 to 2006, totals 11,818 vehicles on the archive's table — fewer than a single good month of the H2's eventual replacement lines elsewhere, and every one of them Mishawaka-built.
Sources:
- GM Hummer Archive — civilian H1 build counts by model year 2000–2006 (data updated August 2026), the absent 2005 model year, the 11,818 total.
- Hummer H1 Alpha record — the 729-unit run in two build waves (448 and 281), the Duramax LLY and Allison 1000 powertrain.