Approval Details

Valid E.O.


This Executive Order approved the specified parts on on April 22, 1991.
As of Saturday, February 4th, 2023 this Executive Order has not been overturned or superceeded.

Approved Parts

Part NumberModels
Part No. 31040E1974 and older model-year GM vehicles equipped with an eight-cylinder engine.

This Executive Order may be listed as:
  • C.A.R.B.E.O. D-221-23
  • Executive Order 221-23 / D221-23
  • ARB # D-221-23
  • Executive Order No: D-221-23
  • C.A.R.B. No. D-221-23
  • Resolution D-221-23
For Free CARB Executive Order Status verification, email an image of the device Executive Order label as well as the Year/Make/Model and Test Group # of the vehicle to [email protected]

Download: Executive Order D-221-23 PDF

D-221-23 Document:

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