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Chevrolet
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2002
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Blazer 4D Utility, 4WD, Part Time
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Repair and Diagnosis
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External Pages
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Different car
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Section 1848 (HVAC System - Manual)
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Diagnostic Information and Procedures
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DTC P2520 or P2521
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Diagnostic Fault Information
Diagnostic Fault Information
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.
DTC P2520 or P2521
Circuit
Short to Ground
Open/High Resistance
Short to Voltage
Signal Performance
A/C Request Circuit
P2520
P2520
P2521
P2521
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