Hummer Forums by Elcova - Hummer H2 compressor programming update

#02-03-99-002: Service Air Suspension Message Diagnostic Trouble Code (DTC) C0711 and/or Clicking Noise From Rear of Vehicle with Ignition Off and/or Electronic Controlled Air Suspension (ECAS) Compressor Cycles Too - (Nov 26, 2002)

Subject:Service Air Suspension Message Diagnostic Trouble Code (DTC) C0711 and/or Clicking Noise From Rear Of Vehicle With Ignition Off and/or Electronic Controlled Air Suspension (ECAS) Compressor Cycles Too Frequently (Reprogram ECAS Control Module)

Models:2003 HUMMER H2
with Off Road Suspension Package (RPO ZM6)

<A href="#ss1-1205170">Condition

Some customers may comment on a Service Air Suspension message and/or a clicking noise from the rear of the vehicle when the vehicle is shut off and the key is removed from the ignition and/or the ECAS compressor cycles too frequently while the vehicle is running.
<A href="#ss2-1205170">Cause

ECAS control module calibration issues.
<A href="#ss3-1205170">Correction

For diagnosis and repair of the ECAS, follow the service procedure below.

For diagnosis of Service Air Suspension DTC C0711, refer to DTC C0711 (SI Document ID #857738).