GM Thermostat Kit, 2001-2016 LB7/LLY/LBZ/LMM/LML

Part# DMAX-1129/DMAX-1130


WARNING: Cancer and Reproductive Harm - www.P65Warnings.Ca.Gov

Fits: 2001 thru 2016 Chevy Silverado/GMC Sierra 2500HD/3500HD LB7/LLY/LBZ/LMM/ LB7/LLY/LBZ/LMM/LML

Is your truck running a little warmer than it used to? Do you have high miles on your truck? Perhaps it's time for some new thermostats. These DMAX thermostats are a direct replacement for the GM originals. Manufactured to OE specifications, these perform like the originals when the truck was new. We highly recommend these especially when upgrading your water pump and other cooling system components. 

Sold as a set


  • Part# DMAX-1129 / 97241129 Opens at 185º
  • Part# DMAX-1130 / 97241130 Opens at 180º

DmaxStore Note:

  • The oil filler tube and upper coolant pipe seals are not included. They are highly recommended to be replaced during a thermostat replacement to prevent leaks.
  • Replaces GM Part# 97241129 / 97241130