Approval Details

Valid E.O.


This Executive Order approved the specified parts on on February 16, 1999.
As of Tuesday, May 21st, 2024 this Executive Order has not been overturned or superceeded.

Approved Parts

1987 through 1995 General Motors trucks or truck engines equipped with a throttle body injection (TBI) system and a V6 or V8 engineThe Cold Air Induction System is comprised of two main parts: Cold air box and an open element air cleaner. The cold air box is installed between the firewall and the front of the air cleaner inside the vehicles engine compartment. The open element air cleaner sits inside the cold air box and is comprised of a reusable element placed between a metal top and bottom. No engine sensors are moved or modified with the addition of the Cold Air Induction System.

This Executive Order may be listed as:
  • C.A.R.B.E.O. D-477
  • Executive Order 477 / D477
  • ARB # D-477
  • Executive Order No: D-477
  • C.A.R.B. No. D-477
  • Resolution D-477
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-477 PDF

D-477 Document:

Current View

| Previous E.O. D-476 | Next E.O. D-477-1 | Next E.O. D-478