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Just as FordTechOne predicted (Thanks Again!!!) the diagnostic test is to pull fuse #33 and if it eliminates the whine it is the ACM...

Update: Well... after 3 trips to the dealership and 2 trips by their audio tech to my office they finally got the necessary info to order the new ACM (Audio Control Module) and I had it installed today. Fingers crossed but so far the whine is GONE. Hallelujah!!!

Maybe they should put a F150 Limited muffler on the GT's also... :doh2:

Great to hear (or not hear... :D)! Anyone have updates on prices they've been quoted???

I love, love, love the adaptive cruise. Honestly will probably never buy another vehicle without it. Out here in West Texas on long stretches of Interstate with lots of trucks driving 62 mph when I cruise at 81... saves me having to constantly tap the brakes and then reset the cruise. Highway...

A fool and his money are soon parted... bought my new, left over 802a '19 from a small mom and pop dealership in Oklahoma a month ago for $8500 off list and they honestly gave me more for my trade than it was worth ($1700 more than any local dealer here would offer, I shopped it). Glad now I...

Agricover Lomax folding cover... same as Weathertech Alloy Cover (just can get for $315 cheaper through a supporting vendor). I love this forum!

No problem. Decided to go another route. Thanks.

Especially if you get it from Nick!

Just ordered mine from Nick@GotExhaust. Great price, will give review after I install it. Best friend has one (Weathertech) on his '19 Raptor and loves it. Of course he paid $999 for his...

Curious to see if anyone can find the Limited muffler for less $$$...

My son raised show goats several years ago--sounds more like that than a cow... I'm a country boy and have pulled my fair share of calves. They have a deeper 'blaaaaat'. :Big Laugh:

Interested. Not a fan of the "farm animal giving birth" stock exhaust note.

And I was holding out for the '1969 Mustang Mach One 428 SCJ with Ram Air'. Rats...

Just had mine Line-X'd. Looks nice, should be durable, lifetime warranty...

Price? Interested...

What a PITA... hopefully it will now all work out to your satisfaction.

Reading all this makes me really glad I live in Texas!:cheers:

Bingo! It started making the whine again this morning, I pulled the #33 fuse and it stopped. Put it back in, went through a couple driving cycles and it started up again--pulled the fuse again and immediately stopped. Just took it to my local dealer and showed them, tech said yes--definitely ACM...

Uhhh... no.

LOL... youngest is 22 yrs.

I’ll try removing the fuse. No charger, no mods—just got the truck Friday. Makes the noise with stereo turned completely off, also with AC turned off.

No one else having this issue?

Will get some pics today. Loving the truck so far except that damned high pitch whine...

This may have been figured out a long time ago, but... I have it and it's driving me nuts. Just picked up my new leftover '19 Raptor yesterday. Drove from Ada, OK to Weatherford, TX with no problems. Stopped and got out for maybe 30 minutes for coffee and when I restarted the truck I noticed a...