GM 12591720
Camshaft Position Sensor

The CMP sensor replacement process starts with disconnecting the electrical connector before uninstalling the CMP sensor retaining bolt. Position the camshaft position (CMP) sensor so that you fasten the CMP sensor bolt to 10 N.m (89 lb in) while following the service precautions for fastener use. Complete the replacement process by connecting the electrical connector of the CMP sensor.

The first step to replace the Camshaft Position Sensor (except RPOs LY2, LC9, Ly5, and LMG) is to clean the cmp sensor area to keep foreign matter from accessing the engine compartment. Support the vehicle before disconnecting the engine wiring harness electrical connector which is connected to the cmp sensor wire harness. The crankshaft Harmonic Balancer continues in its original position since the instructions show its removal for visual purposes. The first step involves removing two cmp sensor wire harness bolts (738) while loosening the top bolt using a box wrench inserted through the Harmonic Balancer opening and turning it two turns. Unplug the electrical connectors of the cmp sensor wire harness from both the cmp sensor and the cmp actuator magneto before removing the cmp sensor wire harness (737) with cmp sensor (703) and o-ring seal (704). The o-ring must have intact condition before cleaning it with engine oil then placing the sensor. Begin front cover installation of cmp sensor (703) while the cmp sensor wire harness (737) gets positioned after. After joining the cmp sensor wire harness electrical connectors to the sensor and magneto of the cmp actuator install two cmp sensor wire harness bolts (738) and torque them to 12 nm (106 lb in). You should loosely tighten the top cmp sensor wire harness bolt by hand followed by box wrench usage through the Harmonic Balancer opening to achieve an extra 1/4 turn of torque (90 degrees). Connect the engine wiring harness electrical connector with the cmp sensor wire harness before lowering the vehicle.

The first step to replace the Camshaft Position Sensor that serves RPO codes LY6/L76/L92 requires you to clean the sensor area to stop debris from reaching the engine system. Begin by supporting the vehicle under the lift before disconnection takes place between the engine wiring harness electrical connector and CMP sensor wire harness. Remove three bolts (738) from the CMP sensor wire harness and disconnect its electrical connectors from the CMP sensor and the CMP actuator magnet. The CMP sensor wire harness (737) and its complementary items such as CMP sensor (703) and O-ring seal (704) need to be removed. After checking the sensor O-ring for damages, apply clean engine oil before installing it onto the sensor. Use CMP sensor (703) to attach it onto the front cover before connecting CMP sensor wire harness (737). Attach the CMP sensor wire harness electrical connectors both to the CMP sensor and CMP actuator magnet prior to tightening three CMP sensor wire harness bolts (738) to 12 N.m (106 lb in). The engine wiring harness electrical connector needs to be connected to the CMP sensor wire harness before lowering the vehicle.

The replacement operation for the Camshaft Position (CMP) Sensor should begin with proper vehicle elevation and support installation. Start by removing the engine shield bolts followed by taking out the shield if it has one. The first step involves disconnecting the CMP sensor electrical connector before you proceed to remove the CMP sensor bolt and the CMP sensor from its mounting position. Examine the sensor for wear and cracks and leakage when you do not plan to replace it. During CMP sensor installation inspect the O-ring for damage or wear because any noticed issues mean swapping the O-ring followed by engine oil lubrication before putting the sensor in place. Fasten the CMP sensor into position by using the CMP sensor bolt to reach 12 N.m torque (106 lb in). Before installation of the CMP sensor electrical connector reconnect it then install the engine shield and its bolts when applicable and tighten the bolts to 20 N.m (15 lb ft). Finally, lower the vehicle.

The replacement process for the camshaft position (CMP) sensor starts with removing the generator bracket assembly before unfastening the Camshaft Position Sensor mounting bolts and finally removing the sensor assembly (4, 5, 6) from the front cover. First disconnect the engine harness connector then separate the Camshaft Position Sensor jumper harness from both harnesses before taking out the camshaft sensor assembly (4, 5, 6) and removing the Camshaft Position Sensor that was connected to the jumper harness. To install the components you must first connect the camshaft sensor then the jumper harness then position the o-ring on the camshaft sensor assembly (4 and 5). The front cover contains a clean motor oil application on the o-ring before installing the Camshaft Position Sensor assembly (4, 5, and 6) together with its engine harness connector. The mounting bolts of the Camshaft Position Sensor need to be tightened to 25 n.m (18 lb ft) before reinstallation of the generator assembly.

The replacement of camshaft position (CMP) sensor demands beginning with dismounting the generator mounting bracket followed by removing both Camshaft Position Sensor mounting bolts and the Camshaft Position Sensor assembly (4, 5, 6) from the front cover assembly. Disconnect the jumper harness that belongs to the Camshaft Position Sensor and the engine harness electrical connectors before separating the camshaft sensor from its o-ring. Use a new o-ring by discarding the old one. The installation of the new o-ring requires motor oil application before inserting it onto the camshaft sensor. Connect the camshaft sensor and to the jumper harness followed by reconnection of the engine harness connector to the jumper harness . Screw the camshaft sensor assembly (4, 5, 6) onto the front cover while using the mounting bolts by tightening them to 25 n.m (18 lb ft). The last step involves reinstalling the generator mounting bracket.

The first step for camshaft position sensor replacement consists of cleaning around the CMP sensor because dirt might enter the engine. Support the vehicle when elevated and proceed to remove the engine shield. Remove the electrical connector from the engine wiring harness on the CMP sensor wire harness and from the CMP sensor wire harness on the CMP actuator magnet. Use a box wrench to unscrew the CMP sensor wire harness bolt through the crankshaft balancer opening by turning it 2 times before proceeding to remove the additional 2 wires. Use a small tool to pull off the CMP sensor wire harness electrical connector retainer before taking out the CMP sensor wire harness and CMP sensor together with the O-ring seal. Check the O-ring seal for any damage. When the seal is intact, apply clean engine oil on it and fit it onto the sensor. Attach the CMP sensor first to the front cover with following installation of the CMP sensor wire harness. Ensure the CMP sensor wire harness electrical connector has its retainer completely enclose the CMP sensor. After supporting the vehicle restore its height and install and tighten the two rear CMP sensor wire harness bolts to 12 Nm (106 lb in). Conduct bolt tightening through the crankshaft balancer opening with a box wrench on the CMP sensor wire harness followed by connector attachments of CMP sensor wire harness electrical connectors to CMP actuator magnet and engine wiring harness electrical connector to CMP sensor wire harness. Finally, install the engine shield.

The replacement process of Camshaft Position Sensors requires first cleaning around the CMP sensor to stop objects from entering the engine compartment. Start by raising and supporting the vehicle before taking out the engine shield. The engine wiring harness electrical connector needs detachment from the CMP sensor wire harness while the CMP sensor wire harness electrical connector should be separated from the CMP actuator magnet. The crankshaft balancer opening allows access to the CMP sensor wire harness bolt which can be loosened by 2 turns with a box wrench. After loosening, you can remove both remaining bolts to lower the vehicle. A flat-bladed tool will help unlock the CMP sensor wire harness electrical connector retainer that detaches it from the CMP sensor while you remove the wire harness and sensor together with its O-ring seal. First check the O-ring seal for damages. If it remains intact you can apply clean engine oil to the seal before placing it onto the sensor. Install the CMP sensor first onto the front cover while proceeding with second installation of the CMP sensor wire harness. Before moving on with installation, ensure complete retention of the CMP sensor by the connector's retainer when connecting the electrical connector of the CMP sensor wire harness. When the vehicle reaches the correct height raise it again to install both rear CMP sensor wire harness bolts and torque them to 12 Nm (106 lb in). Complete the fixture of the CMP sensor wire harness bolt through the crankshaft balancer opening by using a box wrench prior to connecting the CMP sensor wire harness electrical connector to the CMP actuator magnet and the engine wiring harness electrical connector to the CMP sensor wire harness. Finally, install the engine shield.

The replacement process of the Camshaft Position Sensor begins with disconnecting the engine wiring harness electrical connector from its connection to the camshaft position (CMP) sensor wiring harness jumper. Next, remove the Water Pump. You should begin by extracting the cmp sensor bolt before removing the sensor together with its wiring harness jumper from the engine front cover. First remove the cmp sensor from the wiring harness jumper and afterwards disconnect the cmp sensor wiring harness jumper from its junction with the cmp sensor. Before using an existing cmp sensor for reinstallation install a new o-ring sealing component on the sensor. The cmp sensor attachment should go onto the wiring harness jumper before connecting the cmp sensor wiring harness jumper to its location. Apply clean engine oil to the o-ring after which position the cmp sensor along with its wiring harness jumper on the front engine cover yet follow all fastener safety instructions. Attach the cmp sensor bolt while torquing it to 10 nm (89 lb in). The last step is to reconnect the engine wiring harness electrical connector to the cmp sensor harness jumper before reinstalling the Water Pump.

The replacement process for Camshaft Position Sensor (CMP) on RPOs LY2/LC9/LY5/LMG starts with an area cleanup before putting the engine at risk from foreign matter. First support the vehicle while elevation is maintained before removing the CMP sensor wire harness electrical connector from its wiring harness connection. Gently remove CMP sensor wire harness bolt (705, and 738) and disconnect wire harness (737) from its location. The first step entails CMP sensor (703) removal together with O-ring seal (704). The O-ring must be checked for any cuts or damage before deciding to reuse it. The O-ring seal needs engine oil lubrication before its installation onto the sensor. Fit the CMP sensor (703) onto the front cover before putting on the CMP sensor wire harness (737). Fasten and torque the CMP sensor wire harness bolts (705, and 738) to 12 N.m (106 lb in). The engine wiring harness electrical connector must then be connected to the CMP sensor wire harness before lowering the vehicle.

Cleaning the vicinity where the Camshaft Position Sensor (except RPOs LY2, LY5, LH6, and LMG) exists should be the first step before sensor replacement to stop debris from reaching the engine. First raise the vehicle then support it before unconnecting the engine wiring harness electrical connector which is attached to the CMP sensor wire harness. Disconnect the CMP sensor wire harness by removing three bolts (738) on the sensor and disconnecting wiring connectors from both CMP sensor and CMP actuator magnet. Start by disassembling the CMP sensor wire harness 737 and then proceed to detach the CMP sensor 703 along with seal O-ring (704). The CMP sensor O-ring must be tested for damage before a lubricated installation of the sensor. The CMP sensor (703) must be installed onto the front cover and followed by securing the CMP sensor wire harness (737) which should have its electrical connectors attached to the CMP sensor and the CMP actuator magnet. Torque the CMP sensor wire harness bolts (738) to 12 Nm while performing a 106 lb in Torque specification. Lower down your vehicle and connect the engine wiring harness electrical connector to the CMP sensor wire harness.

Remove the CMP sensor bolt and then take out the CMP sensor.

Remove the ECM bracket bolts and reposition the bracket to gain access.

Turn the ignition OFF and avoid disconnecting the power steering fluid lines/hoses from the reservoir.

Place the CMP sensor back in position and install the CMP sensor bolt, tightening it to 25 N.m (18 lb ft).

Remove the power steering fluid reservoir bolts and reposition the reservoir to gain access.

Remove the camshaft sensor assembly and disconnect the camshaft position sensor from the jumper harness.

Install the generator assembly.

Install the CMP sensor to the front cover, then attach the CMP sensor wire harness and connect the electrical connectors.

First, remove the generator bracket assembly.

Follow fastener caution guidelines.

First, remove the generator bracket assembly.

Clean the area around the CMP sensor to prevent debris from entering the engine.

Place the CMP sensor in position and install the CMP sensor bolt.

Install a NEW O-ring seal onto the sensor; do not reuse the original O-ring seal.

Tighten it to 29 N.m (21 lb ft).

Follow fastener precautions to avoid vehicle damage.

Lubricate the O-ring seal with clean engine oil.

Inspect the sensor for wear, cracks, or leakage.

Reconnect the engine wiring harness electrical connector to the CMP sensor wire harness and lower the vehicle.

Install the CMP sensor and tighten the CMP sensor bolt to 10 N.m (89 lb in).