Matty Patty

The dealership should have that information for you. And I believe if DFM had been disabled G.M. will credit you $50 dollar's off/credit from the price of the vehicle. See link below https://gmauthority.com/blog/2021/03/gm-to-offer-50-credit-on-chevy-silverado-and-gmc-sierra-without-afm-dfm/

Same thing with my 2019 RST... I went to pick it up from the warranty work and trim work was all jacked up next to the back window on both sides. Also the B-pilliars on each side had some of the airbag sticking out at the roof line. I was also leary about having the warranty work done right away and waited awhile to take it in. Wasn't long enough apparently. I smiled and said nope! Get me a rental and call me when it's right which they did eventually. Unreal on $50k plus truck... Ugh

@truck_newbie I have a 01/19 Mexico Truck with the AAJF SU4 American Axle GM part# 84605752 one. Hope this helps. Sent from my SM-G965U using Tapatalk

That's exactly what I was thinking! That the AAHD went to Indiana while the AAJF went South of the border to Mexico. Not much difference at all. Yes I do have the 2-speed transfer case and believe it comes with the Z-71 package that way. The non Z-71 RST's have the 1-speed case if I remember correctly. Do you know when your build date was?

My Chevy RST-Z71 5.3, 8-speed, Crew Cab, 01/19 build date made at the Mexico plant has the AAJF one.

I sure as heck hope the AAJF one is not for the 4cyl, or 6.2 or 6, 10-speed trans. Because... This picture was snapped today under my 2019 5.3 Ecotec3 / 8-speed RST-Z71 lol My truck shows that it was built 01/19 at the Mexico plant. Im still waiting on the build sheet with the RPO codes on it and assume it will have the "SU4" code for the American axle built one. Hopefully this helps

Yes its located under the Truck. From the drivers side crawl under your truck and look for the drivers side tire (D.S.T. / Red Arrow in picture) half shaft going into the front differential. The sticker is between the skid plate and bottom of the front differential (Red circle in picture) Z06JPB posted a picture of the AAHD one. GM Part# 84557635 This is a picture of the AAJF one. GM Part# 84605752 The web site for the AAJF one GM Part# 84605752 https://www.bonanza.com/listings/New-Gm-Oemgmc-Sierra-1500-Denali-19-20-Silverado-1500-Front-Axle-Differential/755053294?goog_pla=1&gpid=341761184097&keyword=&goog_pla=1&pos=1o3&ad_type=pla&gclid=EAIaIQobChMIke-O-o2u5AIVCIzICh2ozQ8pEAYYAyABEgJ4ofD_BwE the website list this at the bottom and states that the AAJF one "Fits 2019-2020 new body Sierra pick up and Sierra Denali pickup with electric shift, #84605752 only!!" It goes on to state that they (GM) make 4 different axles... So maybe 2 of them are the American axle ones and the other 2 GM axles??? I'm assuming that the AAHD and AAJF ones are American Axles??? Anyone have a part # for the "GM" stamped axles? Hopefully this helps. They make 4 different axles so you MUST verify this info or it will not work! On the white sticker, the GM Part # is right there - if this matches, you got the right one: 84605752 - only! DO NOT GO BY VIN# ONLY - dealer did and got this wrong one! Hopefully this helps...

I had a 2015 LT "Shakearado" that would coat the interior with whatever drink you had in the cup holder at highway speeds. Got a new new 19 RST Z71 crew cab (Mexico build) 2 weeks ago... First thing I did was the "Coffee" test. Grabbed a large coffee with no lid from the showroom wating area and took a test drive. I went down the highway at all different speeds. Not a drop... I couldn't believe it coming from the 2015 Shakearado. 500 miles of mostly highway driving and no issues with vibration (knock in wood) so far. Definitely take the truck your looking at for a coffee test drive before you sign anything. You'll know right away if you've experienced the Shakearado feeling in the past. Hopefully this helps and good luck. I love the new one!

I saw in a video somewhere that on the T1 it is plastic to create a thermal break. So when you go to release the latch it not hot on your hand if the motor has been running for awhile but... Probably to save $$$ lol

Pickup Truck talk did a video on YouTube called "2019 Chevrolet Silverado dynamic fule management demonstration" Hopefully this helps