How to replace the Heated Oxygen Sensor (HO2S) for Bank 2 Sensor 1 on GMC Acadia?

Before attempting replacement of bank 2 sensor 1 ho2s avoid removing its pigtail since this will result in sensor operation degradation. Keep the Oxygen Sensor handling gentle and handle the in-line electrical connector alongside the louvered end while avoiding contact with grease or dirt through any cleaning solvent operation. Replacements for an Oxygen Sensor are required when any damage occurs to the pigtail wiring or connector or terminal because such damage reduces performance and obstructs the air reference. Apply contact cleaner only to connectors besides the vehicle harness and sensor because both will sustain damage when exposed to the cleaner. Also avoid bending lead wires too sharply or kinking them and do not remove the Oxygen Sensor ground wire because these activities create performance problems. Packard's crimp and splice seals terminal repair kit with its solder-free design should be used for necessary repairs while checking that the vehicle harness connector peripheral seal is not damaged by water intrusion. The sensor replacement process starts with removing the sight shield followed by unhooking the engine wiring harness electrical connector from the ho2s electrical connector . After removing the retainer from the engine wiring harness clip the ho2s must be extracted from the Exhaust Manifold. The sensor threads should receive gm p/n 12377953 anti-seize compound before ho2s installation to the Exhaust Manifold followed by torqueing to 42 n.m (31 lb ft). The engine wiring harness electrical connector must be secured to the ho2s electrical connector before installing the ho2s electrical connector retainer against the engine wiring harness clip followed by refitting the fuel injector sight shield.

OEM GMC Acadia Oxygen Sensor

Oxygen O2 Sensor

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11 Oxygen Sensors found

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GMC Acadia Oxygen Sensor Part Number: 55489474
$35.52 MSRP: $72.13
You Save: $36.61 (51%)
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Product Specifications
- Other Name: Sensor Assembly-Heated Oxygen (Pre-Catalyst Bank 1 Se; Upper Oxygen Sensor; Sensor, Computer Control Sensors
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2020-2023 GMC Acadia | Denali, SLE, SLT | 4 Cyl 2.0 L GAS
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GMC Acadia Oxygen Sensor Part Number: 12667438
$41.61 MSRP: $84.51
You Save: $42.90 (51%)
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Product Specifications
- Other Name: Sensor Assembly-Heated Oxygen (Pre-Catalyst Bank 2 S; Rear Oxygen Sensor; Front Oxygen Sensor; Upper Oxygen Sensor; Lower Oxygen Sensor; Sensor, Computer Control Sensors
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2017-2023 GMC Acadia | AT4, Denali, SLE, SLT | 6 Cyl 3.6 L GAS
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GMC Acadia Oxygen Sensor Part Number: 12643707
$44.51 MSRP: $67.06
You Save: $22.55 (34%)
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Product Specifications
- Other Name: Sensor, Computer Control Sensors; Front Oxygen Sensor; Upper Oxygen Sensor
- Replaces: 12627139
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2017-2021 GMC Acadia | SL, SLE, SLT | 4 Cyl 2.5 L GAS
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GMC Acadia Oxygen Sensor Part Number: 12634061
$48.88 MSRP: $87.28
You Save: $38.40 (44%)
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Product Specifications
- Other Name: Sensor, Computer Control Sensors; Rear Oxygen Sensor; Front Oxygen Sensor; Upper Oxygen Sensor; Lower Oxygen Sensor
- Replaces: 12607333
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2009-2011 GMC Acadia | Denali, SL, SLE, SLT | 6 Cyl 3.6 L GAS
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GMC Acadia Oxygen Sensor Part Number: 12616125
$69.02 MSRP: $140.18
You Save: $71.16 (51%)
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Product Specifications
- Other Name: Sensor, Computer Control Sensors; Rear Oxygen Sensor
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2009-2011 GMC Acadia | Denali, SL, SLE, SLT | 6 Cyl 3.6 L GAS
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GMC Acadia Oxygen Sensor Part Number: 12594452
$54.19 MSRP: $110.06
You Save: $55.87 (51%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Sensor, Computer Control Sensors; Front Oxygen Sensor
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2007-2008 GMC Acadia | SLE, SLT | 6 Cyl 3.6 L GAS
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GMC Acadia Oxygen Sensor Part Number: 12718669
$34.37 MSRP: $69.81
You Save: $35.44 (51%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Sensor, Computer Control Sensors; Lower Oxygen Sensor
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2020-2023 GMC Acadia | Denali, SLE, SLT | 4 Cyl 2.0 L GAS
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GMC Acadia Oxygen Sensor Part Number: 12661898
$63.01 MSRP: $127.99
You Save: $64.98 (51%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Sensor, Computer Control Sensors; Rear Oxygen Sensor; Lower Oxygen Sensor
- Replaces: 12643903
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2017-2021 GMC Acadia | SL, SLE, SLT | 4 Cyl 2.5 L GAS
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GMC Acadia Oxygen Sensor Part Number: 12634085
$113.76 MSRP: $320.30
You Save: $206.54 (65%)
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Product Specifications
- Other Name: Sensor, Computer Control Sensors; Rear Oxygen Sensor
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2012-2016 GMC Acadia | Denali, SL, SLE, SLT | 6 Cyl 3.6 L GAS
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GMC Acadia Oxygen Sensor Part Number: 12634064
$77.31 MSRP: $157.02
You Save: $79.71 (51%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Sensor, Computer Control Sensors; Rear Oxygen Sensor; Front Oxygen Sensor; Lower Oxygen Sensor
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2012-2016 GMC Acadia | Denali, SL, SLE, SLT | 6 Cyl 3.6 L GAS
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GMC Acadia Oxygen Sensor Part Number: 12597947
$84.49 MSRP: $171.60
You Save: $87.11 (51%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Sensor, Computer Control Sensors; Rear Oxygen Sensor
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2007-2008 GMC Acadia | SLE, SLT | 6 Cyl 3.6 L GAS

GMC Acadia Oxygen Sensor

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The Oxygen Sensor in GMC Acadia vehicles enables monitoring of the air/fuel mixture largely in the engine exhaust to improve on its performance and also to minimize on its emissions. The sensor responds to the signals representing the amount of unburned oxygen in the exhaust gases and sends feedback signals to the engine control computer an this way it keeps the air to fuel consumption ration in check. Oxygen sensor usually consist of a sensing element of zirconium dioxide with platinum coating an internal construction of ceramic and steel. These sensors have high-temperature operation, and often a heating coil for better response time. Modern GMC Acadia produced vehicle models are usually fitted with a minimum of 2 oxygen sensors, one of which is before and after the catalytic converter the feedback necessary for the fuel control. The upstream sensor is the only feedback source for the computer which the downstream sensor checks on the catalytic converter effectiveness. The undesirable effects of deterioration of oxygen sensor include increased emissions, decreased fuel efficiency thus requiring maintenance and replacement. Some newer vehicles may have air/fuel ratio sensors instead of, or in addition to, the oxygen sensors in the exhaust: these sensors offer a greater range of measurement capability.

GMC Acadia Oxygen Sensor Parts and Q&A

Oxygen Sensor
12594452
Q: How to replace the Heated Oxygen Sensor (HO2S) for Bank 2 Sensor 1 on GMC Acadia?
A:
Before attempting replacement of bank 2 sensor 1 ho2s avoid removing its pigtail since this will result in sensor operation degradation. Keep the Oxygen Sensor handling gentle and handle the in-line electrical connector alongside the louvered end while avoiding contact with grease or dirt through any cleaning solvent operation. Replacements for an Oxygen Sensor are required when any damage occurs to the pigtail wiring or connector or terminal because such damage reduces performance and obstructs the air reference. Apply contact cleaner only to connectors besides the vehicle harness and sensor because both will sustain damage when exposed to the cleaner. Also avoid bending lead wires too sharply or kinking them and do not remove the Oxygen Sensor ground wire because these activities create performance problems. Packard's crimp and splice seals terminal repair kit with its solder-free design should be used for necessary repairs while checking that the vehicle harness connector peripheral seal is not damaged by water intrusion. The sensor replacement process starts with removing the sight shield followed by unhooking the engine wiring harness electrical connector from the ho2s electrical connector . After removing the retainer from the engine wiring harness clip the ho2s must be extracted from the Exhaust Manifold. The sensor threads should receive gm p/n 12377953 anti-seize compound before ho2s installation to the Exhaust Manifold followed by torqueing to 42 n.m (31 lb ft). The engine wiring harness electrical connector must be secured to the ho2s electrical connector before installing the ho2s electrical connector retainer against the engine wiring harness clip followed by refitting the fuel injector sight shield.