If you’re looking for a pre-emissions Duramax that doesn’t break the bank, this is it. This 2008 GMC Sierra 3500HD SLT is powered by the legendary 6.6L LMM Duramax and paired with the 6-speed Allison automatic transmission. It’s a Crew Cab 4x4 Long Bed Dually — a true workhorse with everyday drivability and classic diesel reliability.
Many enthusiasts consider 2007.5–2008 LMM Duramax trucks to be the sweet spot: still pre-DEF, with fewer emissions complications than later years, and built during GM’s strongest heavy-duty era.
Finished in a clean metallic gray over a black leather interior with heated seats, this truck has just over 146K miles, a clean title, and a solid service history. Whether you’re towing, hauling, or planning a long-haul conversion — this Dually is ready to go.
Key Highlights: • 6.6L LMM Duramax Diesel (Pre-DEF) • Allison 1000 6-Speed Automatic • SLT Trim Package • Heated Leather Seats • Crew Cab | 4x4 • Long Bed (8ft) • Dual Rear Wheel (DRW) • 146,126 miles • Clean Title | Strong Carfax Service History
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