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Home >> Chevrolet >> 2003 >> Chevy Express H2500 >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 5 (Engine Controls - Basic Diagnostic Procedures) >> Preliminary Inspection & Adjustments >> Visual Inspection

Visual Inspection

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Visually inspect all electrical wiring. Look for chafed, stretched, cut or pinched wiring. Ensure electrical connectors fit tightly and are not corroded. Ensure vacuum hoses are properly routed and not pinched or cut. If necessary, see appropriate VACUUM DIAGRAMS - EXPRESS & SAVANA article to verify routing and connections. Inspect air induction system for possible vacuum leaks.