180 Degrees F Alternate Temperature Option
180 Degrees F Alternate Temperature Option
160 Degrees F Alternate Temperature Option
195 Degrees F OE Specified Temperature
195 Degrees F OE Specified Temperature
180°F
192 Degrees F OE Specified Temperature
180 Degrees F Alternate Temperature Option
192 Degrees F OE Specified Temperature
205 Degrees F Higher Alternate Temperature Replacement
160 Degrees F Alternate Temperature Option
195 Degrees F OE Specified Temperature
160 Degrees F Alternate Temperature Option
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
180 Degrees F Alternate Temperature Option
160 Degrees F Alternate Temperature Option
180 Degrees F Alternate Temperature Option
180°F
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
Replaces TH0963.80J Opening Temp: 80 C / 176 F
180 Degrees F Alternate Temperature Option
195 Degrees F OE Specified Temperature
180 Degree; OE Temperature
195 Degree; Alternate Temperature
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."
192 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."
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."
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; Alternate Temperature
Replaces TH0963.91 Opening Temp: 93 C / 199 F
180 Degree; OE Temperature
160 Degree; Alternate Temperature
180 Degree; Alternate Temperature
195 Degrees F OE Specified Temperature
Without Leak Groove; Gasket Included Opening Temp: 82 C / 180 F
180 Degrees F Alternate Temperature Option
195 Degree; OE Temperature
Without Leak Groove; Gasket Included Opening Temp: 92 C / 197 F
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."
195 Degree; Alternate Temperature
180 Degree; OE 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."
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."
180°F
180 Degree; Alternate Temperature
180 Degree; Alternate Temperature
195 Degree; OE Temperature
195 Degree; OE Temperature
Available Until Stock Depleted; 180 Degree; Alternate Temperature
w/ 195°F
w/ 195°F
195°F
Browse our selection of quality engine coolant thermostat parts designed specifically for your GMC S15. We carry options across multiple trim levels, body styles, and engine configurations to ensure a perfect fit.
Base · EL · Gypsy · High Sierra · Sierra Classic · Sierra Grande
Cab & Chassis · Extended Cab Pickup · Standard Cab Pickup
L4 1.9L · L4 2.0L · L4 2.2L · L4 2.5L · V6 2.8L · V6 4.3L
Automatic · Manual