GMC R3500 Thermostat

ENGINE COOLANT THERMOSTAT, STAINLESS STEEL -- 195 degrees temperature rating; 2.13 x 0.91 x 0.91 in.; A high quality, OE replacement engine coolant thermostat; Backed by 1-year, unlimited-mileage warranty.

Fits the following 1987-1991 GMC R3500 submodels:

• 1990-1991: SLE; 8 Cyl 5.7L; "GAS"
• 1987-1991: Base; 8 Cyl 5.7L; "GAS"

• 1990-1990: SLE; 8 Cyl 7.4L; "GAS"

• 1987-1990: Base; 8 Cyl 7.4L; "GAS"

• 1987-1989: High Sierra; 8 Cyl 5.7L; "GAS"

• 1987-1989: High Sierra; 8 Cyl 7.4L; "GAS"

• 1987-1989: Sierra Classic; 8 Cyl 5.7L; "GAS"

• 1987-1989: Sierra Classic; 8 Cyl 7.4L; "GAS"

• 1987-1988: Base; 6 Cyl 4.8L; "GAS"

• 1987-1988: High Sierra; 6 Cyl 4.8L; "GAS"

• 1987-1988: Sierra Classic; 6 Cyl 4.8L; "GAS"

Fits 9 more submodels. (Show all) Show less info

STANT ECONOMY THERMOSTAT -- 180 degrees, 2-1/8 x 7/8 x 25/32 in.; Comes with self-cleaning and self-aligning thermostat valve; Made of high strength stainless steel assembly; Offers engineered springs for smooth performance; A high quality, direct fit OE replacement thermostat.

Fits the following 1987-1991 GMC R3500 submodels:

• 1990-1991: SLE; 8 Cyl 5.7L; "GAS"
• 1987-1991: Base; 8 Cyl 5.7L; "GAS"

• 1990-1990: SLE; 8 Cyl 7.4L; "GAS"

• 1987-1990: Base; 8 Cyl 7.4L; "GAS"

• 1987-1989: High Sierra; 8 Cyl 5.7L; "GAS"

• 1987-1989: High Sierra; 8 Cyl 7.4L; "GAS"

• 1987-1989: Sierra Classic; 8 Cyl 5.7L; "GAS"

• 1987-1989: Sierra Classic; 8 Cyl 7.4L; "GAS"

• 1987-1988: Base; 6 Cyl 4.8L; "GAS"

• 1987-1988: High Sierra; 6 Cyl 4.8L; "GAS"

• 1987-1988: Sierra Classic; 6 Cyl 4.8L; "GAS"

Fits 9 more submodels. (Show all) Show less info

HYPERTECH POWERSTAR THERMOSTAT -- 180 degrees; Made from stainless steel material; Improves performance by inducing less heat into the intake air and reducing the engine's tendency to detonate; Replaces factory thermostat; Realizes full potential of hypertech power tuning; Requires no modifications; With lifetime Hypertech limited warranty.

Fits the following 1991-1991 GMC R3500 submodels:

• 1991-1991: Base; 8 Cyl 7.4L;
• 1991-1991: SLE; 8 Cyl 7.4L;

JET PERFORMANCE LOW TEMPERATURE THERMOSTAT, STAINLESS STEEL, SOLD INDIVIDUALLY -- 180 degrees opening temperature rating, high-flow; Gasket not included; Adds life to engine and provide a denser air and fuel mixture which helps produce more horsepower while reducing engine temperature; Constructed of premium stainless steel material.

Fits the following 1991-1991 GMC R3500 submodels:

• 1991-1991: Base; 8 Cyl 7.4L;
• 1991-1991: SLE; 8 Cyl 7.4L;

AC DELCO ENGINE COOLING THERMOSTAT -- A high quality, direct fit OE replacement engine cooling thermostat; With 12-month or 12,000-mile AC Delco warranty.

Fits the following 1991-1991 GMC R3500 submodels:

• 1991-1991: Base; 8 Cyl 7.4L; "GAS, FI, Naturally Aspirated, VIN N"
• 1991-1991: SLE; 8 Cyl 7.4L; "GAS, FI, Naturally Aspirated, VIN N"