Code Recording Procedure

WARNING: This page is about a different car, the 2003 GMC Yukon XL, 2003 Chevrolet Suburban, and 2003 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Identifying Code Recording Procedure

Courtesy of GENERAL MOTORS CORP.

Turn the main function switch to the CODE position.
Important:
- If power is interrupted prior to the recording of the seven-character code, the code will be lost and the flow rate test will need to be repeated.
- The flow test must run for a minimum of 8-10 seconds and be above 0.5 gpm for a code to be generated.
Record TESTED flow rate, temperature, cycle and seven-character flow code information on repair order.