Approval Details

Valid E.O.


This Executive Order approved the specified parts on on April 24, 2001.
As of Saturday, April 20th, 2024 this Executive Order has not been overturned or superceeded.

Approved Parts

Part NumberModelsModification
2010, 30101999 through 2001 General Motors trucks equipped with a 4.8 or 5.3 liter engine. Vehicles that are emissions certified to the Ultra-Low Emissions Vehicle (ULEV) emission standards or equipped with a close coupled warm up catalyst are excluded from this Executive Order.The 2000 and 3000 Series Headers consist of a pair of long tube style headers with a connecting Y pipe. The 2000 series is manufactured out of 14 gage mild steel and the 3000 series is manufactured out of 16 gage stainless steel. The location of the oxygen sensor is at the collector in the connecting pipe, similar to the stock configuration.

This Executive Order may be listed as:
  • C.A.R.B.E.O. D-484-1
  • Executive Order 484-1 / D484-1
  • ARB # D-484-1
  • Executive Order No: D-484-1
  • C.A.R.B. No. D-484-1
  • Resolution D-484-1
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-484-1 PDF

D-484-1 Document:

Current View

Previous E.O. D-484 | Previous E.O. D-483 | Next E.O. D-484-2 | Next E.O. D-485