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Home >> GMC >> 2002 >> Envoy 2WD L6-4.2L VIN S >> Repair and Diagnosis >> Relays and Modules >> Relays and Modules - Powertrain Management >> Relays and Modules - Computers and Control Systems >> Engine Control Module >> Technical Service Bulletins >> All Technical Service Bulletins >> Recall - PCM Failure Caused by Electronic Suspension >> Service Procedure
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Service Procedure

The following service procedure provides instructions for installing a jumper harness in series between the compressor for the electronic controlled air suspension (ECAS) and the vehicle wiring harness underneath the vehicle.





1. Raise the vehicle on a suitable hoist and support as necessary.

Important
When disconnecting the electrical connector in the next step, the grey colored terminal cover inside the harness connector may remain in the connector on the ECAS compressor. If this occurs, the new jumper harness cannot be connected to the compressor until the grey cover is removed.

2. Locate and disconnect the eight-way electrical connector (2) from the ECAS compressor (1).

3. Connect one end of the new jumper harness to the connector on the ECAS compressor.

4. Connect the other end of the jumper harness to the connector on the vehicle harness.

5. Secure the new jumper harness to the original vehicle wiring harness using the plastic tie strap.

6. Lower the vehicle.
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