Mishimoto high-temperature racing thermostat set for the 2001-2010 Chevrolet/GMC 6.6L Duramax diesel. Opening at 185°F and 191°F (higher than stock), it lets engine temperatures rise for a quicker warm-up — ideal for colder climates. Direct-fit replacement, backed by the Mishimoto Lifetime Warranty.
| Type | High-temperature racing thermostat set |
| Activation Temp | 185°F & 191°F |
| Engine | GM 6.6L Duramax diesel |
| Part Number | MMTS-CHV-01DH |
| Warranty | Lifetime |
| Application | 2001-2010 Chevy/GMC 6.6L Duramax (see fitment) |
This part fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2006-2016 | Chevrolet | Express 2500 | Base |
| 2006-2016 | Chevrolet | Express 3500 | Base |
| 2001-2005 | Chevrolet | Silverado 2500 HD | Base |
| 2001-2026 | Chevrolet | Silverado 2500 HD | LT |
| 2007-2026 | Chevrolet | Silverado 2500 HD | LTZ |
| 2004-2026 | Chevrolet | Silverado 2500 HD | WT |
| 2001-2005 | Chevrolet | Silverado 3500 | Base |
| 2007-2026 | Chevrolet | Silverado 3500 HD | LT |
| 2006-2016 | GMC | Savana 2500 | Base |
| 2006-2016 | GMC | Savana 3500 | Base |
| 2002-2005,2015-2021 | GMC | Sierra 2500 HD | Base |
| 2011-2026 | GMC | Sierra 2500 HD | Denali |
| 2001-2026 | GMC | Sierra 2500 HD | SLE |
| 2001-2026 | GMC | Sierra 2500 HD | SLT |
| 2002-2005 | GMC | Sierra 3500 | Base |
| 2007-2026 | GMC | Sierra 3500 HD | SLE |
| 2007-2026 | GMC | Sierra 3500 HD | SLT |
Shipping: In-stock orders placed before 3 PM EST ship the same day, and everything else ships within 24 hours. Standard, expedited, and overnight options are available at checkout. Backordered items ship as soon as we get them back in stock. Contact us for lead times. See the full Shipping Policy.
Returns: 30-day returns on new, unused items in original packaging. See the full Refund Policy.
