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Home >> Chevrolet >> 2020 >> Express 2500 LS, 6.0L Eng VIN G >> Repair and Diagnosis >> External Pages >> Different car >> Section 58 (Transmission Cooling System) >> Diagnostic Information and Procedures >> Transmission Fluid Cooler Flow Test and Flushing >> Code Recording Procedure

Code Recording Procedure

WARNING: This page is about a different car, the 2019 GMC Savana 3500, 2019 GMC Savana 2500, 2019 Chevrolet Express 3500, and 2019 Chevrolet Express 2500. However, it is still accessible from the selected car via links, so may be relevant.
  1. GM1212346Courtesy of GENERAL MOTORS COMPANY

    Turn the main function switch to the CODE position.

    2. NOTE:
    • 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.
  2. Record TESTED flow rate, temperature, cycle and seven-character flow code information on repair order.
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