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Code Types Chevrolet Avalanche I

Engine Controls - Self-Diagnostics - 4.8L, 5.3L & 6.0L - Flex Fuel & Gasoline

Code Types

There are 3 types of DTC categories

  1. Type "A" Emissions related. Illuminates MIL the first time DTC sets.
  2. Type "B" Emissions related. Illuminates MIL if fault is active for 2 consecutive driving cycles.
  3. Type "C" Non-emissions related. Does not illuminate MIL, but may illuminate a SERVICE light.