Diesel Aftertreatment System for 2025 GMC Sierra 2500 HD
No.
Part # / Description / Price
Price
1
Temp Sensor 
GM
GM Description: Exhaust. Silverado, Sierra 2500 HD. At catalytic converter. Front. Silverado, Sierra 3500 HD. 6.6L diesel, at manifold. 6.6L diesel, sensors, at converter.
MSRP $78.10
$51.16
MSRP $78.10
$51.16
2
Exhaust Temperature Sensor GM
GM Description: 6.6L diesel, egr valve & related components, 2017-19, upper, rear. Exhaust temp sensor. 6.6l. Position 2. 6.6L diesel, sensors, at exh pipe. Silverado, Sierra 2500 HD. Silverado, Sierra 3500 HD. Helps provide accurate temperature detection
Heat and vibration resistant for operating efficiently
MSRP $78.78
$45.26
MSRP $78.78
$45.26
6
Nitrogen Oxide Sensor GM
GM Description: Silverado, Sierra 2500 HD. Diesel. Front. Silverado, Sierra 3500 HD.
MSRP $209.24
$118.22
MSRP $209.24
$118.22
7
Nitrogen Oxide Sensor GM
GM Description: Silverado, Sierra 2500 HD. Diesel. Rear. Silverado, Sierra 3500 HD.
MSRP $249.18
$140.79
MSRP $249.18
$140.79
No.
Part # / Description / Price
Price
1
Catalytic Converter 1 GM
GM Description: Silverado, Sierra 2500 HD. Diesel. Nox converter. Silverado, Sierra 3500 HD.
$755.97
$755.97
2
Exhaust System Seal 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 $10.71
$8.23
MSRP $10.71
$8.23
3
Exhaust Front Bracket 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 $9.52
$7.32
MSRP $9.52
$7.32
4
Exhaust System Hanger Insulator GM
GM Description: 2018-20, 3 hole. Single exhaust, front. 6.6L diesel, 3-hole. Dual exhaust, front. 2.7L, front. 4.3L, front. 3.6L 2017-21. front. 2.8 turbo diesel rear section. Helps secure and support your vehicle's exhaust pipe to the underside of the vehicle
Helps prevent excessive vibration and noise from entering the interior cabin
This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $31.32
$23.30
MSRP $31.32
$23.30
5
Diesel Particulate Filter 1 GM
GM Description: Silverado, Sierra 2500 HD. Short box. 6.6L diesel, crew cab, 6.9 ft box. Silverado, Sierra 3500 HD.
6
MSRP $12.97
$9.96
7
Muffler & Pipe Insulator GM
GM Notes: PARTS: Part included with muffler & pipe.
Description: 6.6L diesel, 3-hole, short.
MSRP $17.68
$13.16
MSRP $17.68
$13.16
8
Exhaust System Hanger Insulator GM
GM Description: Helps secure and support your vehicle's exhaust pipe to the underside of the vehicle
Helps prevent excessive vibration and noise from entering the interior cabin
This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
Collision parts are designed to help promote proper and safe repair
MSRP $31.46
$23.41
MSRP $31.46
$23.41
1 This price excludes a refundable manufacturer's core charge. Add the part to your cart to see the core charge.
No.
Part # / Description / Price
Price
1
MSRP $1,445.68
$816.81
2
Diesel Exhaust Fluid (DEF) Tank Front Bracket GM
GM Description: 6.6L diesel, emission reduction system. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $7.43
$5.75
MSRP $7.43
$5.75
3
MSRP $55.12
$31.67
4
Diesel Exhaust Fluid (DEF) Tank Strap GM
GM Description: 6.6L diesel, emission reduction system. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $25.24
$15.65
MSRP $25.24
$15.65
5
MSRP $215.58
$121.80
6
Emission Reduction Fluid Tank Shield GM
GM Notes: PARTS: Part included with tank shield.
Description: 6.6L diesel, emission reduction system. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $25.98
$19.33
MSRP $25.98
$19.33
7
MSRP $98.18
$66.57
8
Reductant Fluid Injector GM
GM Description: Manufactured to GM OE specification for fit, form, and function
MSRP $113.68
$64.23
MSRP $113.68
$64.23
9
Exhaust System Front Gasket GM
GM Notes: PARTS: Part included with injector.
Description: 6.6L diesel, emission reduction system. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $3.83
$2.97
MSRP $3.83
$2.97
10
MSRP $144.50
$81.64
12
Harness GM
GM Description: 6.6L diesel, emission reduction system, 2nd design. 6.6L diesel, emission reduction system, all.
MSRP $203.96
$115.24
MSRP $203.96
$115.24
13
Emission Reduction Fluid Tank Filler Pipe GM
GM Description: 6.6L diesel, emission reduction system, crew cab, 6.9 ft box. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $118.78
$67.11
MSRP $118.78
$67.11
13
Emission Reduction Fluid Tank Filler Pipe GM
GM Description: 6.6L diesel, emission reduction system, crew cab, 8 ft box. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $142.48
$80.50
MSRP $142.48
$80.50
14
Diesel Emissions Fluid (DEF) Tank Filler Cap GM
GM Description: 6.6L diesel, emission reduction system. Emission reduction system, 3.0L diesel. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $26.58
$16.48
MSRP $26.58
$16.48
No.
Part # / Description / Price
Price
2
Exhaust Gas Recirculation (EGR) Valve Gasket GM
GM Description: Silverado, sierra. 6.6l. Silverado, Sierra 2500 HD. Diesel. Silverado, Sierra 3500 HD. Helps provide a leak-free seal
Allows exhaust pollutants to enter the engine for re-burn
Helps the engine emission system operate properly
This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $38.60
$23.93
MSRP $38.60
$23.93
3
Egr Pipe GM
GM Description: Silverado, Sierra 2500 HD. To egr valve. Silverado, Sierra 3500 HD. 6.6L diesel, egr valve & related components, 2017-19. Sierra, silverado. 6.6l. Lower.
MSRP $166.98
$94.34
MSRP $166.98
$94.34
4
Exhaust Gas Recirculation (EGR) Pipe Gasket GM
GM Description: 6.6L diesel, upper. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $8.82
$5.69
MSRP $8.82
$5.69
5
Exhaust Gas Recirculation (EGR) Pipe Gasket GM
GM Notes: PARTS: Part included with EGR pipe.
Description: 6.6L diesel, egr valve & related components, 2017-19, upper. 6.6L diesel, lower. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $39.98
$24.79
MSRP $39.98
$24.79
6
Exhaust Gas Recirculation (EGR) Valve Cooling Feed Hose 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 $21.86
$13.55
MSRP $21.86
$13.55
7
Outlet Hose GM
GM Description: 6.6L diesel, egr valve & related components, 2017-19.
MSRP $18.46
$11.81
MSRP $18.46
$11.81
8
By-Pass Valve GM
GM Description: Egr cooler by-pass valve. Silverado, Sierra 2500 HD. Diesel. Silverado, Sierra 3500 HD.
MSRP $373.68
$211.13
MSRP $373.68
$211.13
9
Exhaust Gas Recirculation (EGR) Cooler Bypass Gasket 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 $11.22
$7.18
MSRP $11.22
$7.18
10
EGR Tube GM
GM Description: This GM Genuine part is designed, engineered and tested to rigorous standards, and are backed by General Motors
MSRP $241.92
$136.68
MSRP $241.92
$136.68
12
Egr Cooler GM
GM Description: Silverado, Sierra 2500 HD. Diesel. Silverado, Sierra 3500 HD.
MSRP $673.58
$380.57
MSRP $673.58
$380.57
16
Engine Coolant Pipe Gasket GM
GM Notes: PARTS: Part included with inlet pipe.
Description: 6.6L diesel, egr valve & related components, 2017-19.
MSRP $8.44
$5.44
MSRP $8.44
$5.44
17
MSRP $144.62
$81.71
19
Exhaust Gas Recirculation Valve Cooler Heat Shield GM
GM Description: Manufactured to GM OE specification for fit, form, and function
MSRP $18.70
$11.97
MSRP $18.70
$11.97
20
MSRP $41.49
$27.16
21
Exhaust Gas Recirculation Pipe Shield GM
GM Description: Manufactured to GM OE specification for fit, form, and function
MSRP $33.66
$20.87
MSRP $33.66
$20.87
22
Temp Sensor GM
GM Description: Silverado, Sierra 2500 HD. Diesel. Position 2. Silverado, Sierra 3500 HD.
MSRP $31.88
$19.77
MSRP $31.88
$19.77
22
Temp Sensor GM
GM Description: Exhaust. Silverado, Sierra 2500 HD. At catalytic converter. Front. Silverado, Sierra 3500 HD. 6.6L diesel, at manifold. 6.6L diesel, sensors, at converter.
MSRP $78.10
$51.16
MSRP $78.10
$51.16
Related Parts
Part # / Description / Price
Price
Injector GM
GM Description: Diesel fluid injector. Silverado, Sierra 2500 HD. Without chassis cab. Silverado, Sierra 3500 HD. Express 2500. 2.8l diesel. Indirect injector. Express 3500. 2.8l diesel. Savana 2500. 2.8l diesel. Savana 3500. 2.8l diesel.
MSRP $417.84
$236.08
MSRP $417.84
$236.08
Injector GM
GM Description: Diesel fluid injector. Silverado, Sierra 2500 HD. With chassis cab. Silverado, Sierra 3500 HD.
MSRP $452.70
$255.78
MSRP $452.70
$255.78
Temp Sensor GM
GM Notes: Order By Vehicle Application.
Description: Exhaust. Silverado, Sierra 2500 HD. At muffler. At tail pipe. Silverado, Sierra 3500 HD.
MSRP $118.50
$66.95
MSRP $118.50
$66.95
Temp Sensor GM
GM Notes: Order By Vehicle Application.
Description: Exhaust. Silverado, Sierra 2500 HD. At catalytic converter. Rear. Silverado, Sierra 3500 HD.
MSRP $109.38
$61.80
MSRP $109.38
$61.80
Module GM
GM Description: Emission reduction level. Silverado, Sierra 2500 HD. Silverado, Sierra 3500 HD. 6.6L diesel, emission reduction system. Suburban. 3.0l diesel. Tahoe. 3.0l diesel. Escalade. 3.0l diesel. Yukon. 3.0l diesel. 3.0L diesel emission reduction system.
Reservoir GM
GM Description: Emission reduction tank. Silverado, Sierra 2500 HD. Silverado, Sierra 3500 HD. 6.6L diesel, emission reduction system.
MSRP $1,134.86
$641.20
MSRP $1,134.86
$641.20
Diesel Particulate Filter 1 GM
GM Description: Silverado, Sierra 2500 HD. Long box. Silverado, Sierra 3500 HD. 6.6L diesel, crew cab, 8 ft box.
MSRP $1,434.69
$972.72
MSRP $1,434.69
$972.72
Diesel Particulate Filter 1 GM
GM Description: Silverado, Sierra 2500 HD. Long box. Silverado, Sierra 3500 HD. 6.6L diesel, double cab.
$764.96
$764.96
Diesel Particulate Filter 1 GM
GM Description: Silverado, Sierra 2500 HD. Short box. Silverado, Sierra 3500 HD. 6.6L diesel, double cab, 6.9 ft box.
$754.67
$754.67
Diesel Particulate Filter 1 GM
GM Description: Silverado, Sierra 2500 HD. Silverado, Sierra 3500 HD. 6.6L diesel, regular cab.
$743.14
$743.14
1 This price excludes a refundable manufacturer's core charge. Add the part to your cart to see the core charge.