Operation CHARM: Car repair manuals for everyone.
Home >> GMC >> 1987 >> Jimmy Full Size V8-379 6.2L DSL >> Repair and Diagnosis >> Heating and Air Conditioning >> Testing and Inspection >> Component Tests and General Diagnostics >> System Operation Check
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

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System Operation Check

For Blower Related Symptoms, Go to
Blower Motor/Testing And Inspection/ Testing and Inspection


For Compressor Related Symptoms, Go to Air Conditioning Compressor/Testing And Inspection/Testing and Inspection


For Controller/Display Related Symptoms, Go to Control Assembly/Testing And Inspection/


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