160 Degrees F Alternate Temperature Option
195 Degrees F Higher Alternate Temperature Replacement
180 Degrees F OE Specified Temperature
180 Degrees F OE Specified Temperature
160 Degrees F Alternate Temperature Option
205 Degrees F Higher Alternate Temperature Replacement
160 Degrees F Alternate Temperature Option
160 Degrees F Alternate Temperature Option
195 Degrees F OE Specified Temperature
180 Degrees F Alternate Temperature Option
195 Degrees F OE Specified Temperature
Replaces TH1378.70J With Leak Groove Opening Temp: 70C / 158 F
Replaces TH1378.83J With Leak Groove Opening Temp: 83 C / 181 F
195 Degrees F OE Specified Temperature
160 Degrees F Alternate Temperature Option
180 Degrees F Alternate Temperature Option
180 Degrees F Alternate Temperature Option
160 Degrees F Alternate Temperature Option
High Flow Thermostat; With jiggle-pin Opening Temp: 73 C / 163 F
High Flow Thermostat; With jiggle-pin Opening Temp: 82 C / 180 F
195 Degrees F OE Specified Temperature
180 Degrees F Alternate Temperature Option
180 Degree; Alternate Temperature
195 Degree; OE Temperature
195 Degrees F OE Specified Temperature ; "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."
160 Degrees F Alternate Temperature Option ; "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."
180 Degrees F Alternate Temperature Option ; "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."
195 Degree; OE Temperature
160 Degree; Alternate Temperature
180 Degree; Alternate Temperature
Without Leak Groove; Gasket Included Opening Temp: 82 C / 180 F
Without Leak Groove; Gasket Included Opening Temp: 92 C / 197 F
195 Degree; OE Temperature
180 Degree; Alternate Temperature
160 Degrees F Alternate Temperature Option ; "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."
180 Degrees F OE Specified Temperature ; "The patented Fail-Safe (R) thermostat is the only thermostat on the market designed to lock in the open position, allowing coolant to continue to flow in the event of overheating."
160 deg.; Race Only
180 deg.; Race Only
190 Degree; OE Temperature
195 deg.; Race Only
Browse our selection of quality engine coolant thermostat parts designed specifically for your GMC R2500. We carry options across multiple trim levels, body styles, and engine configurations to ensure a perfect fit.
Base · High Sierra · Sierra Classic
Cab & Chassis · Crew Cab Pickup · Standard Cab Pickup
L6 4.8L · V6 4.3L · V8 5.0L · V8 5.7L · V8 6.2L · V8 7.4L
Automatic · Manual
