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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1168 (Engine Controls - 6.0L - Alternative Fuels (Introduction)) >> Description and Operation >> Fuel System Description >> Fuel System Operation >> 60 Day Cycle

60 Day Cycle

WARNING: This page is about a different car, the 2004 GMC Sierra and 2004 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.

It is recommended that every 60 days the vehicle be cycled between CNG and gasoline. This ensures the gasoline fuel system stays in good working condition and also accommodates for seasonal changes in gasoline formulation. Perform the following steps every 60 days.

  1. With the vehicle operating on CNG check and fill the gasoline level.
  2. Operate the vehicle until the CNG fuel tank is empty and the vehicle switches over to gasoline operation.
  3. Operate the vehicle until the gasoline tank is near empty.
  4. Refill both fuel tanks.
  5. The vehicle will switch-over to CNG operation.
  6. Repeat procedure in 60 days.
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