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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 120 (Engine Controls - Removal, Overhaul & Installation - Except Diesel) >> Emission Systems & Sub-Systems >> EVAP System Cleaning >> Cleaning Procedure

Cleaning Procedure

WARNING: This page is about a different car, the 2002 GMC Sierra, 2002 GMC Cab & Chassis Sierra, 2002 Chevrolet Silverado, and 2002 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove EVAP canister. See EVAP CANISTER . Turn main valve to OFF position on EVAP Pressure/Purge Diagnostic Station. Disconnect hose from EVAP Pressure/Purge Diagnostic Station pressure regulator. Using a section of vacuum hose, connect one end to EVAP Pressure/Purge Diagnostic Station pressure regulator. Connect other end of vacuum hose to EVAP canister side of purge pipe.
  2. Turn main nitrogen cylinder valve to ON and continue to discharge nitrogen for 15 seconds. If the nitrogen does not dislodge the carbon particles, replace the purge pipe. Replace EVAP canister. Continue with DTC test.
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