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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 946 (Transfer Case (NVG226-NP8)) >> Diagnostic Information and Procedures >> DTC C0550: Critical Operational Parameters Stored In EEPROM Have Failed, Checksum Error >> Circuit Description

Circuit Description

WARNING: This page is about a different car, the 2002 GMC Envoy XL, 2002 GMC Envoy, and 2002 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.

At each power up the transfer case shift control module runs a self test on the following:

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