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USD 78.95

Mishimoto Low Temperature Thermostats MMTS-CHV-01DL

2001-2010 GM 6.6L Duramax
★★★★★ ★★★★★ 5 Reviews
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The Mishimoto Chevrolet Duramax low temperature thermostats activate at a lower temperature than the OEM thermostats, making them the perfect solution for Duramax owners who live in warmer climates, or use their trucks under heavy load or strenuous driving conditions. Activating at a lower temperature means coolant will begin flowing through the system and allow for cooler temperatures.

  • Great for those in warmer climates
  • Keeps truck cooler under heavy loads


  • 1 - 174 F Thermostat
  • 1 - 180 F Thermostat
  • Limited Lifetime Warranty

Vehicle Applications

2001 Chevy 6.6L LB7 Duramax
2002 Chevy 6.6L LB7 Duramax
2003 Chevy 6.6L LB7 Duramax
2004 Chevy 6.6L LB7 Duramax
2004.5 Chevy 6.6L LLY Duramax
2005 Chevy 6.6L LLY Duramax
2006 Chevy 6.6L LLY/LBZ Duramax
2007 Chevy 6.6L LLY/LBZ Duramax
2007.5 Chevy 6.6L LMM Duramax
2008 Chevy 6.6L LMM Duramax
2009 Chevy 6.6L LMM Duramax
2010 Chevy 6.6L LMM Duramax
2001 GMC 6.6L LB7 Duramax
2002 GMC 6.6L LB7 Duramax
2003 GMC 6.6L LB7 Duramax
2004 GMC 6.6L LB7 Duramax
2004.5 GMC 6.6L LLY Duramax
2005 GMC 6.6L LLY Duramax
2006 GMC 6.6L LLY/LBZ Duramax
2007 GMC 6.6L LLY/LBZ Duramax
2007.5 GMC 6.6L LMM Duramax
2008 GMC 6.6L LMM Duramax
2009 GMC 6.6L LMM Duramax
2010 GMC 6.6L LMM Duramax


  • MFG. Number MMTS-CHV-01DL
  • Manufacturer Name Mishimoto
  • Shipping Weight 5.00 lb.
  • Shipping Length 6 in.
  • Shipping Width 4 in.
  • Shipping Height 3 in.
  • Fuel Type Diesel
  • UPC 748354804492
  • Warranty Yes
  • Warranty Info Limited Lifetime
  • Prop 65 WARNING: Cancer & Reproductive Harm -


★★★★★ ★★★★★
4.2/5 Stars out of 5 Reviews
So far so good
(Elsberry MO.) | June 5th, 2021
Dropped me about 10 degrees from stock. Not much of a change unless your pulling a load then it takes a little longer to worm up. In other words it buys you a little more time on an incline. #1428045
Perfect swap! Read the description.
(Tempe AZ) | December 1st, 2020
The bad reviews on these thermostats are more than likely from guys/girls who think that replacing them will solve their overheating problems. (If you take a dump in your garden and your tomatoes don't grow better, don't get mad at your butthole!) They're not taking into consideration the internal buildup of debris in their radiators and intercoolers, or the external buildup of debris on the fins of both as well. I replaced my stock thermostats without any issues and I have been running cooler temps since then- but I also did a coolant flush, cleaned the fins with foaming condenser coil cleaner (for HVAC units but it works the same for vehicles), and replaced things that needed replaced along the way because I'm not a doofus.... don't be a doofus. If your truck is still over heating after all of that, then check the junk tuner you added. Or maybe chickity check yourself because you're a bad driver and you don't know how to operate your rig.
Verified Buyer
Amazing quality
(VA) | October 16th, 2020
#1112626 these have been in my truck for a while now and I love them temps are about 10 degrees cooler than factory.
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Questions and Answers

Why two thermostats in the 6.6L Duramax?
View Staff Answer 

The 6.6L Duramax engines are equipped with two engine thermostats.

It pretty much one of those because they can situations I've se this setup used before on larger Diesel engines I.e. The cat c12 and c15 from my experience it seems to have a better flow when open

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