GM Service Manual Online
For 1990-2009 cars only

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Object Number: 19385  Size: GT

Refer to

Notice: The OBD II symbol is used on the circuit diagrams in order to alert the technician that the circuit is essential for proper OBD II emission control circuit operation. Any circuit which fails and causes the malfunction indicator lamp (MIL) to turn ON, or causes emissions-related component damage, is identified as an OBD II circuit.

in Cautions and Notices.