1996 Ford F250 Owner's Manual - Page 372

NOTE: All current model year vehicles are certified to the same year emissions standards except certain vehicles equipped with engines built prior to January 1 of the model year which may be certified to prior year emissions standards. In either case, the maintenance schedules contained in the back of this Owner Guide must be used to maintain your engine. Noise emissions warranty, prohibited tampering acts On January 1, 1978, Federal regulations became effective governing the noise emissions on trucks with a GVWR of over 10,000 lbs (4,536 kgs). The following statements concerning prohibited tampering acts and the noise warranty are found in the Warranty Information Booklet, and are applicable to completed F-Series chassis cabs whose GVWR is over 10,000 lbs (4,536 kgs). Do not tamper with the noise control system Federal law prohibits the following acts: 1. The removal or dismantlement, (by any person unless for maintenance, repair or replacement purposes) of any device or design element incorporated into any new vehicle to control noise output, prior to its sale or delivery to the consumer, or while it is being used, or Using your light truck after a device or design element has been removed or dismantled, by any person. 2. 373