Diagnostic Starting Point - SIR. GMC Truck Yukon XL

For 1990-2009 cars only

Makes 🢒 GMC_Truck 🢒 2003 🢒 Yukon XL - 2WD 🢒 Restraints 🢒 SIR 🢒 Diagnostic Starting Point - SIR

Begin the system diagnosis with the Diagnostic System Check - SIR . The Diagnostic System Check - SIR will provide the following information:

•	The identification of the control modules which commands the system

•	The ability of the control modules to communicate through the serial data circuit

•	The identification of any stored diagnostic trouble codes (DTCs) and their status

The use of the Diagnostic System Check - SIR will identify the correct procedure for diagnosing the system and where the procedure is located.