187 Degree thermostat with housing for 1999-2007 GM Truck (Silverado/Sierra) 4.8L/5.3L/6.0L/6.2L
This thermostat is rated at the original 187 degree temperature. Includes seal.
NOTE: Designed to fit early style water pump casting number 12562459 with 52mm thermostat opening. Will NOT fit GM later style revised water pump casting number 12703898 with 47mm thermostat opening.
