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Home >> Chevrolet >> 2021 >> Blazer RS, FWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 11 (Engine Controls And Fuel - 2.5L (LCV) - Diagnostic Information And Procedures (2 Of 2)) >> Diagnostic Information and Procedures >> Fuel Leak Diagnosis >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different variant/trim than selected.
  1. Perform the following action: Clean all of the components in the suspected area using a cleaning solution and allow the components to dry: Fuel System
    2. CAUTION:

    When performing a Fuel Leak Diagnosis, it is VERY IMPORTANT to use only GM approved Oil Dye, Part Number 88861206. If any other oil dye is used, it will cause damage to the fuel injection system components, as well as the emission control components. This will result in necessary replacement of the damaged components.

  2. Perform the following action: Add 237 mL (8 US fl oz) of GM Approved Oil Dye to the component: Fuel Tank - Primary
  3. Engine - Idling - For 3 to 5 min
  4. Use the special tool: GE-28428-E High-Intensity Black Light Kit or GE-42220 Universal 12 V Leak Detection Lamp - Illuminate the area(s) of concern

    Verify there are no leaks in the component/system: High Pressure Side of the Fuel System or Low Pressure Side of the Fuel System

    • If a leak is present 

      Repair or replace as necessary

    • Go to next step: If no leak is present 
  5. All OK.
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