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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1848 (HVAC System - Manual) >> Diagnostic Information and Procedures >> DTC P2520 or P2521 >> Repair Procedures

Repair Procedures

WARNING: This page is about a different car, the 2007 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.

Per form the Diagnostic Repair Verification after completing the repair.

Refer to Control Module References for HVAC replacement, setup, and programming.

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