July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Diagnostic Procedure

Fig 1: DTC P0402: EGR Flow Excessive (Steps 1-8)

Courtesy of GENERAL MOTORS CORP.

Fig 2: DTC P0402: EGR Flow Excessive (Steps 9 & 10)

Courtesy of GENERAL MOTORS CORP.

Fig 3: DTC P0402: EGR Flow Excessive (Steps 11-16)

Courtesy of GENERAL MOTORS CORP.

Fig 4: DTC P0402: EGR Flow Excessive (Steps 17-20)

Courtesy of GENERAL MOTORS CORP.