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

Changing the heated Oxygen Sensor (HO2S) for bank 2 sensor 2 requires maintenance personnel to avoid disconnecting the pigtail from either the ho2s or Oxygen Sensor (O2S) because it can harm sensor operation. Stay cautious with the Oxygen Sensor by preventing drops from happening and maintain the in-line electrical connector and louvered end clean from contaminants along with avoiding any cleaning solvents. The Oxygen Sensor needs replacement rather than repair when the pigtail wiring or connector or terminal shows any damage because such modifications affect air reference pathways and reduce sensor quality. Rarely use contact cleaner with sensor or vehicle harness connectors because applying it harms sensor pigtail wires and harness wires which can create performance issues when sharp bends form in lead wires. Keep the Oxygen Sensor ground wire in place whenever possible because it functions as the primary sensor grounding point and maintain the peripheral seal on the vehicle harness connector to stop water damage. The packard crimp and splice seals terminal repair kit serves as an alternative for engine harness repairs instead of soldering processes. Start the uninstallation process by eliminating the connector position assurance (CPA) retainer then unplug the ho2s electrical connector from the engine wiring harness electrical connector. First increase the vehicle height while providing support and remove the ho2s unit from the Exhaust Pipe. During installation you must use the anti-seize compound gm p/n 12377953 on the old sensor threads when reusing it since new sensors arrive with pre-applied coating. Install the ho2s to the Exhaust Pipe then use torque to a maximum of 42 n.m (31 lb ft). The installation process requires reconnecting the ho2s electrical connector between the engine wiring harness electrical connector before returning the cpa retainer and lowering the vehicle.

OEM GMC Acadia Oxygen Sensor

Oxygen O2 Sensor

Select Vehicle by Model
Select Vehicle by VIN

Select Vehicle by Model

Make

Model

Year

Select Vehicle by VIN

For the most accurate results, select vehicle by your VIN (Vehicle Identification Number).

11 Oxygen Sensors found

View related parts
GMC Acadia Oxygen Sensor Part Number: 55489474
$35.52 MSRP: $72.13
You Save: $36.61 (51%)
Ships in 1-2 Business Days
ADD TO CART
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
View related parts
GMC Acadia Oxygen Sensor Part Number: 12667438
$41.61 MSRP: $84.51
You Save: $42.90 (51%)
Ships in 1-2 Business Days
ADD TO CART
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
View related parts
GMC Acadia Oxygen Sensor Part Number: 12643707
$44.51 MSRP: $70.58
You Save: $26.07 (37%)
Ships in 1-2 Business Days
ADD TO CART
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
View related parts
GMC Acadia Oxygen Sensor Part Number: 12634061
$45.24 MSRP: $91.88
You Save: $46.64 (51%)
Ships in 1-2 Business Days
ADD TO CART
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
View related parts
GMC Acadia Oxygen Sensor Part Number: 12616125
$69.02 MSRP: $140.18
You Save: $71.16 (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:
- 2009-2011 GMC Acadia | Denali, SL, SLE, SLT | 6 Cyl 3.6 L GAS
View related parts
GMC Acadia Oxygen Sensor Part Number: 12594452
$54.19 MSRP: $110.06
You Save: $55.87 (51%)
Ships in 1-3 Business Days
ADD TO CART
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
View related parts
GMC Acadia Oxygen Sensor Part Number: 12718669
$34.37 MSRP: $69.81
You Save: $35.44 (51%)
Ships in 1-3 Business Days
ADD TO CART
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
View related parts
GMC Acadia Oxygen Sensor Part Number: 12661898
$63.01 MSRP: $127.99
You Save: $64.98 (51%)
Ships in 1-3 Business Days
ADD TO CART
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
View related parts
GMC Acadia Oxygen Sensor Part Number: 12634085
$175.22 MSRP: $355.88
You Save: $180.66 (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:
- 2012-2016 GMC Acadia | Denali, SL, SLE, SLT | 6 Cyl 3.6 L GAS
View related parts
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
View related parts
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

Want to cut long-term maintenance and repair costs? Choose OEM Oxygen Sensor. Those parts deliver top durability you can trust. On our site, you'll find a huge catalog of genuine GMC Acadia parts. Prices are unbeatable, so you can keep more in your pocket. Every OEM GMC Acadia Oxygen Sensor includes a manufacturer's warranty. You can also get an easy return policy that keeps buying risk free. Fast delivery, get your car on the road quickly. It's simple to search, compare, and order. Stop guessing about quality or fit. Order today and save with parts that last.

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 Questions & Experts Answers

Oxygen Sensor
12594452
Q: How to replace the Heated Oxygen Sensor (HO2S) for Bank 2 Sensor 2 on GMC Acadia?
A:
Changing the heated Oxygen Sensor (HO2S) for bank 2 sensor 2 requires maintenance personnel to avoid disconnecting the pigtail from either the ho2s or Oxygen Sensor (O2S) because it can harm sensor operation. Stay cautious with the Oxygen Sensor by preventing drops from happening and maintain the in-line electrical connector and louvered end clean from contaminants along with avoiding any cleaning solvents. The Oxygen Sensor needs replacement rather than repair when the pigtail wiring or connector or terminal shows any damage because such modifications affect air reference pathways and reduce sensor quality. Rarely use contact cleaner with sensor or vehicle harness connectors because applying it harms sensor pigtail wires and harness wires which can create performance issues when sharp bends form in lead wires. Keep the Oxygen Sensor ground wire in place whenever possible because it functions as the primary sensor grounding point and maintain the peripheral seal on the vehicle harness connector to stop water damage. The packard crimp and splice seals terminal repair kit serves as an alternative for engine harness repairs instead of soldering processes. Start the uninstallation process by eliminating the connector position assurance (CPA) retainer then unplug the ho2s electrical connector from the engine wiring harness electrical connector. First increase the vehicle height while providing support and remove the ho2s unit from the Exhaust Pipe. During installation you must use the anti-seize compound gm p/n 12377953 on the old sensor threads when reusing it since new sensors arrive with pre-applied coating. Install the ho2s to the Exhaust Pipe then use torque to a maximum of 42 n.m (31 lb ft). The installation process requires reconnecting the ho2s electrical connector between the engine wiring harness electrical connector before returning the cpa retainer and lowering the vehicle.