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Home >> Chevrolet >> 2003 >> Silverado 1500 HD, RWD >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> ENGINE CONTROLS - SELF-DIAGNOSTICS - 4.8L, 5.3L & 6.0L - Flex Fuel & Gasoline >> Diagnostic Tests >> DTC P0442: EVAP System - Small Leak >> Test Description

Test Description

The numbers below refer to the step number in the diagnostic procedure.

  1. 3

    Introducing smoke in 15 second intervals may allow smaller leak areas to be more noticeable. When the system is less pressurized, the smoke will sometimes escape in a more condensed manner.
  2. 5

    This step verifies that repairs are complete and that no other condition is present.