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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 408 (Engine Controls - System Testing & Engine Component Tests - 3.1L) >> Emission Systems & Sub-Systems >> Fuel Tank Leak Test >> Description

Fuel Tank Leak Test: Description

WARNING: This page is about a different car, the 2003 Pontiac Grand Prix, 2003 Chevrolet Malibu, and 2003 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.

The fuel tank leak test is used to locate any fuel or fuel vapor escaping the fuel tank area. Fuel vapors escaping above the fuel level will be detected when the Evaporative (EVAP) emission diagnostics complete one test cycle. The Malfunction Indicator Lamp (MIL) will illuminate after the EVAP diagnostics complete 2 test cycles.

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