Shop with Blessed Performance for the GM Rear Thermostat for your 2001-2021 GM 6.6L LB7/LLY/LBZ/LMM/LML/L5P Duramax diesel. This thermostat features a factory activation temperature of 180 degrees and is a drop-in OEM replacement. Keep your Duramax running its best with the OE-style parts available at XDP.
Highlights:
- Rear Thermostat
- 180 Degree (OE Temp)
- AC Delco Part#: 131-131