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2003
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Sierra 2500 HD, 2D Pickup, 6.6 1, RWD, Automatic
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Repair and Diagnosis
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Engine Performance
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System
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Engine Controls - System & Component Testing - 6.6L
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Idle Control System
Idle Control System
NOTE:
For idle control system testing, perform related DTC testing procedure. See
DIAGNOSTIC TROUBLE CODE DEFINITIONS
in SELF-DIAGNOSTICS - 6.6L SIERRA & SILVERADO - DIESEL article.