Tools Required

J 35748 Oil Pressure Sending Unit Socket

Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.

1. Disconnect the negative battery cable.



2. Disconnect the spark plug wires and the ignition coil wire from the distributor.



3. Disconnect the CMP electrical connector from the distributor.



4. Remove the distributor cap screws.



5. Remove the distributor cap.




Important: A DTC P1345 will set if the rotor is not reinstalled in the exact position the rotor was in prior to removal.

6. Observe the alignment of the rotor in relation to the distributor base (1).



7. Remove the distributor mounting bolt.



8. Remove the distributor assembly.
9. Discard the distributor gasket.



10. Disconnect the fuel pump and engine oil pressure sensor electrical connector.



11. Remove the fuel pump and engine oil pressure sender with a J 35748 Oil Pressure Sending Unit Socket.

Important: Do not use the old cap, CMP sensor, and rotor screws. Use replacement screws that have been coated with a thread locking compound. Precoated replacement cap and CMP sensor screws can be acquired using GM P/N 10475922 (pkg of 10 screws). Precoated replacement rotor screws can be acquired using GM P/N 10475924 (pkg of 10 screws).

Tools Required

J 35748 Oil Pressure Sending Unit Socket

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

1. Install the fuel pump and engine oil pressure sender with a J 35748 Oil Pressure Sending Unit Socket.

Tighten
Tighten the sender to 30 N·m (22 lb ft)




2. Connect the fuel pump and engine oil pressure sensor electrical connector.




Important: The proper CKP/CMP correlation will be lost if the rotor is not be reinstalled in the same exact position. A DTC P1345 will result from improper distributor shaft alignment.

3. Align the rotor in its original position in relation to the distributor base (1).



4. Install the distributor assembly using a new distributor gasket.



5. Install the distributor mounting bolt.

Tighten
Tighten the bolt to 25 N·m (18 lb ft)




6. Install the distributor cap.



7. Install new distributor cap screws.

Tighten
Tighten the screws to 2.4 N·m (21 lb in)




8. Connect the CMP electrical connector.



9. Connect the spark plug wires and the ignition coil wire.
10. Connect the negative battery cable.