Emission Systems
Engine Coolant Pipe Gasket
GM
12737098
ACDelco Gasket (Part Number: 12737098) is a factory-grade gasket for Exhaust Gas Recirculation (EGR) coolant pipe connections....
$1.14
MSRP $1.90
Save $0.76
40% Off 
Oxygen Sensor
GM
12702181
GM Genuine Parts Oxygen Sensor (Part Number: 12702181) is a heated oxygen sensor (pre-catalyst, bank 2) used to monitor exhaust oxygen...
$49.69
MSRP $87.18
Save $37.49
43% Off 
Sensor
GM
12747536
Silverado, Sierra 2500 HD. Front. Silverado, Sierra 3500 HD. 6.6L diesel, sensors, 2024-26.
$117.43
MSRP $214.48
Save $97.05
45.2% Off 
Exhaust Temp Sensor
GM
12737537
6.6L diesel, sensors, at muffler & pipe, posn 3. 6.6L diesel, sensors, 2024-26, exhaust particulate.
$86.16
MSRP $155.24
Save $69.08
44.5% Off 
Vapor Canister
GM
26334031
Awd. Equinox. 1.5l. Fwd. Terrain. 1.5l.
$138.87
MSRP $253.64
Save $114.77
45.2% Off 
Exhaust Gas Recirculation (EGR) Valve Cooler Gasket
GM
55490621
GM Genuine Parts Exhaust Gas Recirculation (EGR) Valve Cooler Gasket (Part Number: 55490621) seals the EGR valve cooler connection to...
$3.13
MSRP $4.57
Save $1.44
31.5% Off 
Secondary Air Injection Pump with Bracket
GM
12634644
ACDelco Secondary Air Injection Pump with Bracket (Part Number: 12634644) is an air injection pump assembly used to supply controlled...
$217.75
MSRP $397.72
Save $179.97
45.3% Off 
Vapor Canister Vent Valve
GM
12559015
Location-Vapor Canister. Square. All models. 4.3l. Hummer H2. Controls fresh air flow to the canister
Sends fuel vapors to the engine...
$25.27
MSRP $44.34
Save $19.07
43% Off 
Heated Oxygen Sensor
GM
12679885
ACDelco Heated Oxygen Sensor (Part Number: 12679885) is an upstream heated oxygen sensor (pre-catalyst) that measures exhaust oxygen...
$52.05
MSRP $91.32
Save $39.27
43% Off 
Vapor Canister Purge Tube
GM
12605523
ACDelco Vapor Canister Purge Tube (Part Number: 12605523) is an EVAP purge tube that routes vapor from the evap canister to the intake...
$17.42
MSRP $29.04
Save $11.62
40% Off 
Positive Crankcase Ventilation (PCV) Tube
GM
12633396
ACDelco Positive Crankcase Ventilation (PCV) Tube (Part Number: 12633396) routes crankcase vapors as part of the PCV/evaporation...
$23.95
MSRP $39.92
Save $15.97
40% Off 
Driver Side Positive Crankcase Ventilation (PCV) Tube
GM
12659515
3.0L twin-turbo, small. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
$32.82
MSRP $50.52
Save $17.70
35% Off 
Position 2 Exhaust Temperature Sensor
GM
12643373
ACDelco Position 2 Exhaust Temperature Sensor (Part Number: 12643373) is an exhaust temperature sensor (position #2) used to monitor...
$134.95
MSRP $246.46
Save $111.51
45.2% Off 
Vapor Canister Purge Tube
GM
12630246
Without supercharger. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
$34.29
MSRP $60.16
Save $25.87
43% Off 
Secondary Air Injection Pipe Flange Gasket
GM
12589488
2.8L. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
$1.34
MSRP $1.96
Save $0.62
31.6% Off 
Vapor Canister Purge Tube
GM
12577221
ACDelco Vapor Canister Purge Tube (Part Number: 12577221) is a purge tube for the EVAP system that routes vapors from the canister to...
$20.24
MSRP $33.74
Save $13.50
40% Off 
Passenger Side Secondary Air Injection Shut-Off and Check Valve
GM
12652895
Right. XTS. Impala. 3.6l. Helps prevent exhaust from entering air pump
This GM Genuine Part is designed, engineered, and tested to...
$182.21
MSRP $332.80
Save $150.59
45.2% Off 
Exhaust Temperature Sensor
GM
12623113
ACDelco Exhaust Temperature Sensor (Part Number: 12623113) is an exhaust temperature sensing assembly designed to detect and report...
$183.06
MSRP $334.34
Save $151.28
45.2% Off 
Heated Oxygen Sensor
GM
12612571
ACDelco Heated Oxygen Sensor (Part Number: 12612571) is a heated (HTD) oxygen sensor engineered to monitor exhaust oxygen content and...
$97.62
MSRP $175.90
Save $78.28
44.5% Off 
Positive Crankcase Ventilation (PCV) Hose Fitting Seal
GM
12644073
ACDelco Positive Crankcase Ventilation (PCV) Hose Fitting Seal (Part Number: 12644073) is an OE sealing O-ring for PCV hose fittings...
$6.10
MSRP $10.16
Save $4.06
40% Off 
Vapor Canister Purge Tube
GM
12607115
ACDelco Vapor Canister Purge Tube (Part Number: 12607115) is an EVAP purge tube that routes fuel vapor from the canister to the purge...
$13.39
MSRP $22.32
Save $8.93
40% Off 
Black Heated Oxygen Sensor
GM
12568234
ACDelco Black Heated Oxygen Sensor (Part Number: 12568234) is a heated oxygen sensor that measures oxygen content in exhaust gases to...
$64.07
MSRP $115.44
Save $51.37
44.5% Off 
Positive Crankcase Ventilation Tube
GM
12687544
ACDelco Positive Crankcase Ventilation Tube (Part Number: 12687544) is a replacement tube for the Positive Crankcase Ventilation (PCV)...
$43.40
MSRP $76.14
Save $32.74
43% Off 
Heated Oxygen Sensor
GM
12599204
ACDelco Heated Oxygen Sensor (Part Number: 12599204) is a heated oxygen sensor assembly that detects oxygen content in exhaust gases...
$117.72
MSRP $215.02
Save $97.30
45.3% Off 
Tube
GM
12728740
5.3 & 6.2L, with police. 5.3 & 6.2L, with ppv.
$10.03
MSRP $16.72
Save $6.69
40% Off 
Positive Crankcase Ventilation Tube
GM
12687311
ACDelco Positive Crankcase Ventilation Tube (Part Number: 12687311) Type: PCV Tube Function: Carries crankcase vapors from the...
$12.66
MSRP $21.10
Save $8.44
40% Off 
Positive Crankcase Ventilation (PCV) Tube
GM
12581194
ACDelco Positive Crankcase Ventilation (PCV) Tube (Part Number: 12581194) is a PCV tube that routes crankcase vapors back into the...
$10.64
MSRP $15.57
Save $4.93
31.7% Off 
Vapor Canister Purge Tube
GM
12654018
This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
$7.73
MSRP $11.31
Save $3.58
31.7% Off 
Module
GM
12746285
6.6L diesel, sensors, at exh pipe. 6.6L diesel, sensors, at converter. 6.6L diesel, sensors, 2024-26, #2.
$61.97
MSRP $97.93
Save $35.96
36.7% Off 
Secondary Air Injection Pipe
GM
12648985
3.6L with flex fuel. Helps maintain controlled air flow to proper air injection components
This GM Genuine Part is designed, engineered,...
$176.45
MSRP $322.28
Save $145.83
45.2% Off 
Heated Oxygen Sensor
GM
12577588
All models. 4.2l. Front. Detects oxygen content in the exhaust gases to help optimize emissions
This GM Genuine Part is designed,...
$68.90
MSRP $124.16
Save $55.26
44.5% Off 
Heated Oxygen Sensor
GM
12578576
ACDelco Heated Oxygen Sensor (Part Number: 12578576) is an OE-style heated O2 sensor that monitors oxygen content in exhaust gases to...
$97.62
MSRP $175.90
Save $78.28
44.5% Off 
By-Pass Hose
GM
12584338
2.0L, #1. 2.0L supercharged, return.
$39.41
MSRP $60.65
Save $21.24
35% Off 
Positive Crankcase Ventilation (PCV) Tube
GM
12673862
ACDelco Positive Crankcase Ventilation (PCV) Tube (Part Number: 12673862) is an OE PCV tube that routes crankcase ventilation gases to...
$47.62
MSRP $83.54
Save $35.92
43% Off 
Secondary Air Injection Pump Bracket
GM
12638137
A.i.r. Pump, 3.6L with pzev. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General...
$59.65
MSRP $94.28
Save $34.63
36.7% Off 
Positive Crankcase Ventilation (PCV) Hose
GM
12643296
GM Genuine Parts Positive Crankcase Ventilation (PCV) Hose (Part Number: 12643296) is an OEM replacement hose for the PCV system...
$5.15
MSRP $8.58
Save $3.43
40% Off 
EGR Valve
GM
12578040
S-series. 4.3l. Tbi. Astro, Safari. 4.3l. Auto trans. Vin code z. All. Aurora. Seville. G10-30 vans. 7.4l. Modulates the flow of exhaust...
$191.06
MSRP $348.96
Save $157.90
45.2% Off 
Exhaust Gas Re-Circulation (Egr) Valve Gasket
GM
12570863
Cover Gasket.
$4.56
MSRP $7.61
Save $3.05
40.1% Off 
Air Injection Valve
GM
12567733
ACDelco Air Injection Valve (Part Number: 12567733) is a check/control valve used in the secondary air injection (AIR) system to...
$119.39
MSRP $218.06
Save $98.67
45.2% Off 
Heated Oxygen Sensor
GM
12643707
ACDelco Heated Oxygen Sensor (Part Number: 12643707) is an upstream heated oxygen (O2) sensor that detects oxygen content in exhaust...
$44.51
MSRP $68.74
Save $24.23
35.2% Off 
Diesel Emissions Reduction Fluid (DEF) Injector
GM
12647372
ACDelco Diesel Emissions Reduction Fluid (DEF) Injector (Part Number: 12647372) is an aftermarket emission‑system injector engineered...
$249.58
MSRP $455.85
Save $206.27
45.2% Off 
Heated Oxygen Sensor
GM
12608662
ACDelco Heated Oxygen Sensor (Part Number: 12608662) is a heated O2 sensor used to detect oxygen content in exhaust gases and support...
$70.55
MSRP $127.12
Save $56.57
44.5% Off 
Air Injection Valve
GM
12619127
ACDelco Air Injection Valve (Part Number: 12619127) Note: Input abbreviations expanded on first mention — Secondary (SECD) and...
$311.45
MSRP $568.86
Save $257.41
45.3% Off 
Positive Crankcase Ventilation (PCV) Tube
GM
12648746
GM Genuine Parts Positive Crankcase Ventilation (PCV) Tube (Part Number: 12648746) is an OE PCV fresh-air tube that routes crankcase...
$30.53
MSRP $53.56
Save $23.03
43% Off 
Vapor Canister Purge Tube
GM
12611130
ACDelco Vapor Canister Purge Tube (Part Number: 12611130) is an emission control tube that routes evaporative purge vapors between the...
$16.22
MSRP $27.04
Save $10.82
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