Thermostat & Housing for 2025 GMC Sierra 3500 HD
No.
Part # / Description / Price
Price
1
Acdelco™ Engine Water Pump 
GM
GM Description: Silverado, Sierra 2500 HD. Silverado, Sierra 3500 HD. Silverado, sierra. 6.6l.
2
Water Pump Cover Seal GM
GM Description: Silverado, sierra. 6.6l. 6.6L diesel. Silverado, Sierra 2500 HD. O-ring. Silverado, Sierra 3500 HD. Made from some heat and chemical-resistant materials
This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $8.00
$4.20
MSRP $8.00
$4.20
3
8x1.25x59.05 Front Compartment Side Rail Bolt GM
GM Description: 6.6L diesel, main battery. Auxiliary. Storage tray, 2nd design. Primary. 4.2L twin-turbo. Fuel tank & pump, 8x59mm. Main battery, 2014-2017. 2009 2nd design, 2010. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $9.53
$5.70
MSRP $9.53
$5.70
4
M8x1.25x105 Multi-Purpose Bolt GM
GM Description: 6.6L diesel. 2.4L. With high output. 1.5L turbo. 1.4L. 3.6L. 2.0L. Fastens vehicle's components together
This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
Original equipment parts are designed to work with your GM vehicle safety systems -- aftermarket replacement parts may not meet the same OE safety regulations, depending on the part type
MSRP $15.56
$9.31
MSRP $15.56
$9.31
4
Multi-Purpose Bolt 
ACDelco
ACDelco Description: GM Genuine Parts Bolts are designed, engineered, and tested to rigorous standards, and are backed by General Motors. These bolts fasten vehicle components together. GM Genuine Parts are the true OE parts installed during the production or validated by General Motors for GM vehicles. Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE). ⚠ WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
bolt
bolt
$9.13
$9.13
5
Multi-Purpose Bolt GM
GM Description: 6.6L diesel. 6.6L. to block. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $9.04
$4.75
MSRP $9.04
$4.75
6
Multi-Purpose Nut GM
GM Description: Helps align and secure various components
This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
Original equipment parts are designed to work with your GM vehicle safety systems -- aftermarket replacement parts may not meet the same OE safety regulations, depending on the part type
7
Thermostat Housing GM
GM Description: 6.6L diesel. Silverado, sierra. 6.6l. Silverado, Sierra 2500 HD. Silverado, Sierra 3500 HD.
MSRP $209.30
$109.87
MSRP $209.30
$109.87
7
Acdelco™ Thermostat Housing GM
GM Description: 6.6L diesel. Silverado, sierra. 6.6l. Silverado, Sierra 2500 HD. Silverado, Sierra 3500 HD.
8
Engine Coolant Thermostat Housing Gasket GM
GM Description: 6.6L diesel. Helps seal the gap between the exterior of your vehicle's thermostat housing and the exterior of the engine to help prevent leakage
This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $9.16
$4.81
MSRP $9.16
$4.81
8
Engine Coolant Thermostat Housing Gasket ACDelco
ACDelco Description: GM Genuine Parts Engine Coolant Thermostat Housing Gaskets are designed, engineered, and tested to rigorous standards, and are backed by General Motors. These gaskets help seal the gap between the exterior of your vehicle's thermostat housing and engine. G ...
$4.25
$4.25
9
Engine Coolant Thermostat Housing Bolt GM
GM Description: 6.6L diesel. Threads Into Side of Bearing Cap. 8 x 1.25 x 25mm. Fastens vehicle's components together
This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
Original equipment parts are designed to work with your GM vehicle safety systems -- aftermarket replacement parts may not meet the same OE safety regulations, depending on the part type
MSRP $10.25
$6.13
MSRP $10.25
$6.13
9
Multi-Purpose Bolt ACDelco
ACDelco Description: GM Genuine Parts Bolts are designed, engineered, and tested to rigorous standards, and are backed by General Motors. These bolts fasten vehicle components together. GM Genuine Parts are the true OE parts installed during the production or validated by General Motors for GM vehicles. Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE). ⚠ WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
bolt
bolt
Not For Sale
Not For Sale
10
Multi-Purpose Stud GM
GM Description: 6.6L diesel. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $7.93
$4.75
MSRP $7.93
$4.75
11
Multi-Purpose Nut GM
GM Description: This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $2.60
$1.55
MSRP $2.60
$1.55
12
By-Pass Hose GM
GM Description: Silverado, Sierra 2500 HD. Silverado, Sierra 3500 HD.
MSRP $78.04
$40.97
MSRP $78.04
$40.97
13
By-Pass Pipe Seal GM
GM Notes: PARTS: Part included with by-pass pipe.
Description: 6.6L diesel.
MSRP $9.04
$4.75
MSRP $9.04
$4.75
13
Coolant Seal ACDelco
ACDelco Notes: PARTS: Part included with by-pass pipe.
Description: Maintain your Chevrolet, Buick, GMC, or Cadillac vehicle with a Genuine GM Parts Thermostat Bypass Pipe Seal. Only Genuine GM Parts are tested to meet GM Original Equipment standards and are designed specifically to fit your vehicle. ⚠ WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
$3.89
$3.89
14
MSRP $8.00
$4.20
15
Acdelco™ Thermostat GM
GM Description: 6.6L diesel, 180 deg. Silverado, Sierra 2500 HD. 180 degrees. Silverado, Sierra 3500 HD. 180 degrees. 180 Degrees F. Optional. Silverado, sierra. 6.6l. 180 degrees.
15
Thermostat GM
GM Description: 6.6L diesel, 180 deg. Silverado, Sierra 2500 HD. 180 degrees. Silverado, Sierra 3500 HD. 180 degrees. Silverado, sierra. 6.6l. 180 degrees.
MSRP $82.56
$43.33
MSRP $82.56
$43.33
15
Engine Coolant Thermostat ACDelco
ACDelco Description: ACDelco GM Original Equipment Engine Coolant Thermostats control the flow of coolant through your vehicle's radiator to help the engine reach and maintain its optimal operating temperature, and are GM-recommended replacements for your vehicle's original co ...
$38.13
$38.13
16
Engine Coolant Thermostat GM
GM Description: Silverado, sierra. 6.6l. 185 degrees. 6.6L diesel, 185 deg. Silverado, Sierra 2500 HD. 185 degrees. Silverado, Sierra 3500 HD. 185 degrees. Controls the flow of coolant through your vehicle's radiator to help the engine reach and maintain its optimal operating temperature
MSRP $42.22
$22.16
MSRP $42.22
$22.16
16
Engine Coolant Thermostat ACDelco
ACDelco Description: ACDelco GM Original Equipment Engine Coolant Thermostats control the flow of coolant through your vehicle's radiator to help the engine reach and maintain its optimal operating temperature, and are GM-recommended replacements for your vehicle's original co ...
$19.54
$19.54
16
Acdelco™ Thermostat GM
GM Description: 6.6L diesel, 185 deg. Silverado, Sierra 2500 HD. 185 degrees. Silverado, Sierra 3500 HD. 185 degrees. 185 Degrees F. Optional. Silverado, sierra. 6.6l. 185 degrees.
18
Engine Coolant Thermostat O-Ring GM
GM Notes: PARTS: Part included with thermostat.
Description: 6.6L diesel, 185 deg therm. Silverado, Sierra 2500 HD. Silverado, Sierra 3500 HD. 6.6L diesel, 180 deg therm. Seals your vehicle's thermostat housing
Helps prevent coolant from leaking from the engine
This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $13.66
$7.17
MSRP $13.66
$7.17
18
Engine Coolant Thermostat O-Ring ACDelco
ACDelco Notes: PARTS: Part included with thermostat.
Description: GM Genuine Parts Engine Coolant Thermostat Seals are designed, engineered, and tested to rigorous standards, and are backed by General Motors. These seals help prevent coolant leaks from your vehicle's engine. GM Genuine Parts are the true OE parts installed during the production of or validated by General Motors for GM vehicles. Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE). ⚠ WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
$6.30
$6.30
19
Engine Coolant Temperature Sensor GM
GM Description: Helps keep engine running at proper temperature
Alerts vehicle operator of high engine temperature conditions
MSRP $31.75
$16.67
MSRP $31.75
$16.67
19
Engine Coolant Temperature Sensor ACDelco
ACDelco Description: ACDelco GM Original Equipment Engine Coolant Temperature Sensors monitor engine temperature, and are GM-recommended replacements for your vehicle's original components. The engine temperature signal is used by the engine control module to adjust the air/fu ...
$14.19
$14.19
20
Water Outlet GM
GM Description: Manufactured to GM OE specification for fit, form, and function
MSRP $89.04
$46.74
MSRP $89.04
$46.74
20
Water Outlet ACDelco
ACDelco Description: ACDelco GM Original Equipment Engine Coolant Water Outlets are housings that connect the radiator hoses to the engine, typically housing the engine coolant thermostat. For certain applications, the water outlet contains threaded holes or ports for sensors ...
Not For Sale
Not For Sale
22
Water Pump Outlet Pipe Gasket GM
GM Notes: PARTS: Part included with outlet pipe.
Description: 2017-19. 6.6L diesel. Silverado, Sierra 2500 HD. Gasket. Silverado, Sierra 3500 HD. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
Original equipment parts are designed to work with your GM vehicle safety systems -- aftermarket replacement parts may not meet the same OE safety regulations, depending on the part type
MSRP $9.16
$4.81
MSRP $9.16
$4.81
23
Water Pump O-Ring GM
GM Description: Pipe to Oil Cooler. 2017-19. 6.6L diesel. Made from heat and chemical-resistant materials
This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $44.09
$23.16
MSRP $44.09
$23.16
23
Water Pump O-Ring ACDelco
ACDelco Description: GM Genuine Parts Multi-Purpose O-Rings are designed, engineered, and tested to rigorous standards, and are backed by General Motors. These o-rings are used in some applications instead of paper or composite gaskets to seal engine components. The interface ...
$19.87
$19.87
23
Acdelco™ Engine Coolant Pipe O-Ring GM
GM Description: Pipe to Oil Cooler. Outlet pipe,seal. 2017-19 6.6L diesel. 6.6L turbo diesel.