GM 12572705
Oxygen Sensor

In order to replace the Heated Oxygen Sensor Bank 2 Sensor 1, lift and support the vehicle first. Pull out the HO2S from the clips, and disconnect the connector position assurance (CPA) retainer. For automobiles that have engine of 4.8L or 5.3L, remove the HO2S electric connector; For those of 6.0L engine, you should do the same. Remove the HO2S. During installation, if replacing the old sensor, apply anti-seize compound GM P/N 12377953 to the threads since this compound, which consist of liquid graphite and glass beads allows for easier removal. Mount the HO2S and apply a torque of 42 N.m (31 lb ft). Connect the HO2S electrical connector for the 6.0L engine thereafter the connection of the 4.8L or 5.3L engine. Reinstall the HO2S to the clips, remove CPA retainer and lower the vehicle.

A proper vehicle support system must be implemented before starting the HO2S for bank 2 sensor 1 replacement process. Gently separating the HO2S from its connector requires removing its harness clip before unclipping the sensor from the harness. After removing the connector position assurance retainer, disconnect the HO2S electrical connection users can proceed to remove the bank 2 sensor 1 HO2S unit. Installation of old HO2S requires threads to be treated with anti-seize compound GM P/N 12377953 equivalent to provide easier removal. This compound consists of liquid graphite and glass beads. Affix the bank 2 HO2S while ensuring it reaches 42 N.m tightening torque (31 lb ft). Following the repair of the bank 2 HO2S connect the HO2S electrical connector then install the CPA retainer before reattaching the HO2S to the harness with its clip and lowering the vehicle.

To replace the Heated Oxygen Sensor (HO2S) Bank 1 Sensor 2, initially raise and aid the motor vehicle. If equipped, disconnect the fuel composition sensor electrical connector as well as the connector position assurance (CPA) retainer. In case a fuel composition sensor is available, there is need of removing the HO2S from the fuel line clip's electrical connector. For engines with 4.8 liters and 5.3 liters of engine, remove the HO2S electric connector, while for engines that are 6.0L, do the same. Remove the HO2S. During installation, apply anti-seize compound GM P/N 12377953 on the old sensor's threads if it is being reused because new sensors arrive pre-coated. Carry out the installation of the HO2S and tighten it with a value of 42 N.m (31 lb ft). Connect the HO2S electrical connector for 6.0L, perform the same for 4.8L or 5.3L. If a fuel composition sensor is equipped, connect the HO2S to electrical connector to the fuel line clip, resnap the CPA retainer, and finally, connect the fuel composition sensor electrical connector before lowering the vehicle.

To replace the Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1, lift and support the vehicle first. Then you should open the connector position assurance or CPA retainer and remove connector heated oxygen sensor (HO2S) electrical connector. Remove the bank 1 HO2S . During the installation, ensure a special anti-seize compound has been used on the threads of the HO2S. this compound is made up of liquid graphite and glass beads, and new or service replacement sensors already have it coated. Reset the old sensor, coating its threads with anti-seize compound GM P/N 12377953 or an equivalent. Mount the bank 1 HO2S and tighten bossing to get a torque value of 42 N.m (31 lb ft). Then join the HO2S connector electric and the CPA retainer before lowering the vehicle.

The first step to replace the heated oxygen sensor (HO2S) for Bank 2 Sensor 2 consists of raising and supporting the vehicle correctly. Separate the connector position assurance (CPA) retainer while taking off the HO2S connector clip from the frame. Vehicle owners must disconnect the HO2S electrical connector of 4.8L and 5.3L engines or of 6.0L engines separately. Remove the HO2S. The installation of new or reused heated oxygen sensors requires anti-seize compound GM P/N 12377953 on threads to help sensor removal with its liquid graphite and glass beads composition. Tighten the HO2S with 31 lb ft (42 N.m). The electrical connection for HO2S should be connected to all engines but first to the 6.0L engine followed by the 4.8L and 5.3L engines. The frame procedure requires reattaching the HO2S connector clip and disconnecting the CPA retainer along with vehicle lowering.

Maintenance of the heated Oxygen Sensor (HO2S) bank 1 sensor 1 requires initially raising and supporting the vehicle. Before proceeding start by removing the front propeller shaft from the front Differential in case it becomes necessary. Pull off both the connector position assurance (CPA) retainer and disconnect the ho2s electrical connector from its fuel line clip position. Matte hose vehicles that use either the 4.8l or 5.3l engine should first disconnect the ho2s electrical connector . Vehicle owners should disconnect the ho2s electrical connector during sensor replacement on those vehicles with a 6.0l engine yet this step is unnecessary for vehicles with a 4.8l or 5.3l engine. Remove the ho2s. Install anti-seize compound gm p/n 12377953 on threads when using original ho2s, although new sensors arrive with pre-applied coating. Tighten the ho2s to 42 n.m (31 lb-ft) after its installation. For 6.0l engines connect the ho2s electrical connector. Engines with 4.8l or 5.3l require connecting the ho2s electrical connector. You must connect the ho2s electrical connector at the fuel line clip and then remove the cpa retainer before possibly reinstalling the front propeller shaft to the front Differential when you lower the vehicle.

A replacement operation on he heated Oxygen Sensor (HO2S) for bank 1 sensor 2 begins with vehicle support and proper elevation. When the vehicle has a manual transmission with 2-wheel drive (2WD) disconnect the ho2s connector from the crossmember followed by separating the connector position assurance (CPA) retainer and electrical ho2s connector from the harness. The procedure of disconnecting the ho2s connector from the crossmember then removing the cpa retainer and electrical connector must be repeated for vehicles with automatic transmission and 2-wheel drive. The vehicle installation process for 4-wheel drive (4WD) models includes removing the ho2s connector from the crossmember and disconnecting the cpa retainer and the electrical connector. When reinstalling the original bank 2 ho2s sensor the threads should receive an application of anti-seize compound gm p/n 12377953 or equivalent due to specialized gear designed to ease ho2s thread removal. Secure the bank 2 ho2s using torque to 42 n.m when installing (31 lb ft). Connect the ho2s electrical connector to both the harness and cpa retainer. 4wd vehicles require ho2s connector installation on the crossmember after which electrical connector and cpa retainer connections should be restored. First reinstall the ho2s connector to the crossmember while reconnecting both electrical connector and cpa retainer for vehicles with automatic transmission along with 2wd system. Before lowering the vehicle install the ho2s connector to the crossmember for manual transmission and 2wd and reconnect the electrical connector with the cpa retainer.

For vehicles with a 4.8L or 5.3L engine, disconnect the HO2S electrical connector; for those with a 6.0L engine, do the same.

Coat the threads with anti-seize compound GM P/N 12377953 or an equivalent.

First, raise and suitably support the vehicle.

Raise and suitably support the vehicle.

Reconnect the HO2S electrical connector, install the CPA retainer, and secure the HO2S back into the harness clip.

When installing, apply anti-seize compound GM P/N 12377953 to the threads if reinstalling the old sensor.

Tighten it to 42 N.m (31 lb ft).

When installing, apply anti-seize compound GM P/N 12377953 to the threads if reinstalling the old sensor.

Reconnect the HO2S electrical connector and the CPA retainer before lowering the vehicle.

It consists of liquid graphite and glass beads to facilitate future removal.

Connect the HO2S electrical connector for the 6.0L engine first, then for the 4.8L or 5.3L engine.

Install the HO2S electrical connector to the fuel line clip, disconnect the CPA retainer, and reconnect the fuel composition sensor electrical connector.

Tighten it to 42 N.m (31 lb ft).

First, raise and support the vehicle.

First, raise and support the vehicle.

A special anti-seize compound.

The connector position assurance (CPA) retainer and the engine wiring harness electrical connector.

First, raise and support the vehicle securely.

Connect the HO2S electrical connector.

Coat the threads with anti-seize compound GM P/N 12377953 or an equivalent.

42 N.m (31 lb ft).

Connect the HO2S electrical connector.

Connect the HO2S electrical connector for the 6.0L engine first, then for the 4.8L or 5.3L engine.

Disconnect the HO2S electrical connector.

Coat the threads with anti-seize compound GM P/N 12377953 or equivalent.