Jump to content

2020 GMC 3500 SINGLE AXLE AT4 CREW

jojo ma

By jojo ma
in 6.6L Duramax Diesel (L5P)

 Share

Recommended Posts

jojo ma Enthusiast

jojo ma

Posted
Posted (edited)

Wat's Up Gents and Ladies.   Just picked up my Brownstone metallic AT4 over the weekend.  Fully loaded.  Couple of questions hoping to find out if I can get any answers as it seems the salesman and dealer are conflicted.   Here they are if you guys can answer:

 

1. Does the AT4 come with Adaptive Cruise Control (ACC)?  The manual says available in LD model????   I have the AT4 Premium add on, the technology and safety add ons i.e; lane departure, blind spot detection, forward collision and emergency braking, etc.   It does not appear that I do have it, as the symbol for activating it (ACC) does not appear as I click thru instrument panel.  

 

2. The emergency braking forward collision assist.  How do I test this without rear ending someone....LOL

 

3.  Also, they gave me at dealer looks like battery cables for a second battery?  I would assume that it is for that, but it appears that I already have 2 batteries installed, one o the right side facing into engine from front and one on left looks like it is under fuse box?  If not where would the other battery go?

 

Other than that, I love this truck the best.  I got loads of compliments on the truck as well as color.  Hope someone could answer these questions I have.  Thank you

20200531_101523.jpg

Edited by jojo ma
  • Like 2
MTU Alum Enthusiast

MTU Alum

Posted
Posted

1.  ACC not available

2.  Wouldn't recommend testing for it.

3.  Not sure unless you have snow plow prep or some other option.

 

#iworkforGM 

  • 4 weeks later...
BigBru Enthusiast

BigBru

Posted
Posted

Sweet looking ride. I ordered the same truck but 2500.

Nice to see the color in your pics. Do you have any more pics you could send my way?

Alan Juden Enthusiast

Alan Juden

Posted
Posted (edited)
On 5/31/2020 at 1:38 PM, jojo ma said:

Wat's Up Gents and Ladies.   Just picked up my Brownstone metallic AT4 over the weekend.  Fully loaded.  Couple of questions hoping to find out if I can get any answers as it seems the salesman and dealer are conflicted.   Here they are if you guys can answer:

 

1. Does the AT4 come with Adaptive Cruise Control (ACC)?  The manual says available in LD model????   I have the AT4 Premium add on, the technology and safety add ons i.e; lane departure, blind spot detection, forward collision and emergency braking, etc.   It does not appear that I do have it, as the symbol for activating it (ACC) does not appear as I click thru instrument panel.  

 

2. The emergency braking forward collision assist.  How do I test this without rear ending someone....LOL

 

3.  Also, they gave me at dealer looks like battery cables for a second battery?  I would assume that it is for that, but it appears that I already have 2 batteries installed, one o the right side facing into engine from front and one on left looks like it is under fuse box?  If not where would the other battery go?

 

Other than that, I love this truck the best.  I got loads of compliments on the truck as well as color.  Hope someone could answer these questions I have.  Thank you

20200531_101523.jpg

@jojo ma, I'm also curious about this. My truck is a 2020 Chevrolet Silverado 3500 LTZ Z71 srw that has the adaptive cruise control button on the steering wheel but I can't ever get it to engage. Hitting the adaptive cruise button only seems to show the gap control adjustment. From reading the owner's manual, you're supposed to hold on the actual cruise control button and it should change the icon of the green cruise icon to actually have a vehicle in the icon rather than an arrow in the picture. But holding the cruise button doesn't appear to do anything for me except turn off my cruise control. Does your truck have the adaptive cruise control button on the wheel?

 

Let me know if you figure anything out on yours.

 

Alan

Edited by Alan Juden
Wrong user referenced @BigBru --> @JoJo Ma
rblanch Enthusiast

rblanch

Posted
Posted

If you have the upfitter switches the cable could be to connect them it doesn't come factory installed. Red wire with silver tape on it?

BigBru Enthusiast

BigBru

Posted
Posted

I'm positive 2020 HD's don't have adaptive cruise on any trim level.

GM dropped the ball, they've had adaptive cruise on their large SUV's for years.

Its the one option I was really disappointed they don't have.

From what I understand it will be available on the 2021 Hd's.

Alan Juden Enthusiast

Alan Juden

Posted
Posted

That's disappointing, especially since not all of the HD trucks have the button for adaptive cruise control.

CNY_AT4 Enthusiast

CNY_AT4

Posted
Posted

It's not adaptive cruise.  It is the distance warning setting for forward collision

sdelam Enthusiast

sdelam

Posted
Posted

I thought all Duramax come with two batteries. I bet the cables are the snowplow prep stuff. 

BigBru Enthusiast

BigBru

Posted
Posted

Finally got my truck today. Love the color in person. Although it was raining like mad all day.

 

IMG-2127.jpg

gSwift Enthusiast

gSwift

Posted
Posted

I'm glad I saw this thread because I just picked up a 2500 AT4 a couple of weeks ago and thought my adaptive cruise wasn't working. I just assumed that since it had the button to adjust the gap, it should be working. I was afraid it had stopped working because I had my whole front tinted. Glad that wasn't the case

  • 3 weeks later...
jojo ma Enthusiast

jojo ma

Posted
  • Author
Posted
On 6/24/2020 at 12:02 PM, Alan Juden said:

@jojo ma, I'm also curious about this. My truck is a 2020 Chevrolet Silverado 3500 LTZ Z71 srw that has the adaptive cruise control button on the steering wheel but I can't ever get it to engage. Hitting the adaptive cruise button only seems to show the gap control adjustment. From reading the owner's manual, you're supposed to hold on the actual cruise control button and it should change the icon of the green cruise icon to actually have a vehicle in the icon rather than an arrow in the picture. But holding the cruise button doesn't appear to do anything for me except turn off my cruise control. Does your truck have the adaptive cruise control button on the wheel?

 

Let me know if you figure anything out on yours.

 

Alan

No it does not have ACC, it seems a little confusing as you look at manual.  But I realized and researched, it does not have.   

  • 4 months later...
jojo ma Enthusiast

jojo ma

Posted
  • Author
Posted
On 6/24/2020 at 12:02 PM, Alan Juden said:

@jojo ma, I'm also curious about this. My truck is a 2020 Chevrolet Silverado 3500 LTZ Z71 srw that has the adaptive cruise control button on the steering wheel but I can't ever get it to engage. Hitting the adaptive cruise button only seems to show the gap control adjustment. From reading the owner's manual, you're supposed to hold on the actual cruise control button and it should change the icon of the green cruise icon to actually have a vehicle in the icon rather than an arrow in the picture. But holding the cruise button doesn't appear to do anything for me except turn off my cruise control. Does your truck have the adaptive cruise control button on the wheel?

 

Let me know if you figure anything out on yours.

 

Alan

I too have the same button and it does what you described.  I spoke to someone knowledgeable at the dealer and they told me the HD do not have Adaptive Cruise Control?   They said it was not good for towing?   Not sure why that is as they can perform a cut off when trtailer attached.  That is my only dissapointment.  My GF has a aRaptor and the feature is damn cool and useful on long rides.   You found out anything on your end?

Alan Juden Enthusiast

Alan Juden

Posted
Posted
1 hour ago, jojo ma said:

I too have the same button and it does what you described.  I spoke to someone knowledgeable at the dealer and they told me the HD do not have Adaptive Cruise Control?   They said it was not good for towing?   Not sure why that is as they can perform a cut off when trtailer attached.  That is my only dissapointment.  My GF has a aRaptor and the feature is damn cool and useful on long rides.   You found out anything on your end?

@jojo ma, I gave up trying after seeing the responses in here. I worked to get it working for a couple weeks and was never able to. It's just for your automatic braking :(

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing

  • Latest Articles

  • Posts

    • Coastie05
      Replacing 2.7L on 2021 Silverado with 2023 2.7L

      By Coastie05 · Posted

      I’m definitely interested to hear the end result here. 
    • MASONV88888888
      Another 6.2L engine failure!

      By MASONV88888888 · Posted

      My 2025 Silverado 1500 had to receive a brand-new engine (long block) under warranty last month at only around 16,500 miles. Before the replacement, the truck repeatedly displayed "Engine Oil Level Low" warnings, even though the Oil Life Monitor still showed around 50% remaining after about 6,000 miles since my last oil change. After seeing the warning several times, I checked the dipstick with the engine cold, and the oil level was completely normal. The next day, the message escalated to "Add Engine Oil." At first, I assumed it was just a faulty oil level sensor, so I brought the truck to the dealership. After inspecting the engine, they found internal cylinder wall scoring and ultimately replaced the entire long block under warranty. Before this happened, I was planning to install a 4-inch lift and suspension upgrade on my truck. After needing a new engine at just 16,500 miles, I honestly don't see the point anymore. I also contacted GM to ask whether my vehicle qualified for a buyback, but I was informed that it does not at this time. Anyway, this experience has left me with serious concerns about the long-term reliability of this engine. I sincerely hope NHTSA expands the current investigation or recall to include 2025 model and performs a thorough inspection of affected vehicles. My biggest concern is that these engines may fail shortly after the powertrain warranty expires. If GM truly stands behind this engine, then at the very least, please consider extending the powertrain warranty to 10 years for affected owners. That would go a long way toward restoring customer confidence.
    • Grumpy Bear
      OCI, not when but why?

      By Grumpy Bear · Posted

      Without exception but then I'm the odd duck, right? I know what goes into that test, how it is calculated and thus how to beat it. But EPA values are often not beaten by the general public and the government has in past years adjusted the means and methods to come to those values to more closely approximate "Joe Average".    The only real trick to beating that EPA average is don't drive like "Joe Average".    It's the same method you used to profit from "Economic Migration" and in doing so beat the 'stats'. But you, like me, are not "Joe Average".     The thing you don't seem to grasp is this "Purchasing Power Index" isn't forward looking. It doesn't predict what it going to be but looks backward and states what it was. They are not telling us what the THINK, they are telling us what they MEASURED. Example:    Wife says "I'm going to lose 40 pounds by Christmas". May she does, maybe she doesn't but the doctors office who weighed her when she made that statement and again at Christmas only REPORTS what the RESULT was. You and I can banter about what was possible and what aunt Tilly did till the cows come home but the result is the result. Arguing otherwise is.....irrational. That's all I'm saying. This isn't about:      What you are calling a 'Statistic' is a RESULT not a CALCUATION and as a result the RULE. Like gravity as a rule, it can not be broken. 
    • MASONV88888888
      Rattle in the rear!

      By MASONV88888888 · Posted

      Just wanted to say thank you for posting this. Years later, your thread is still helping Silverado owners.   I bought my 2025 Silverado 1500 in January 2025, and I've had what feels like the exact same rattle since day one. After reading your findings, I believe my truck has the same issue with the cable carrier contacting the rear sliding window. To be honest, I had pretty much given up on pursuing the issue. It wasn't until I recently drove another brand's pickup that I realized just how quiet their cabin was—and how noisy mine has been all along. On my truck, the rattle happens on almost any paved road, gets even worse on rougher pavement, and I can even hear it during braking and acceleration.   I actually referenced your thread when submitting my case to GM, hoping they'll recognize this as a recurring issue instead of treating it as an isolated incident. The reason I reached out to GM first is because my dealership told me they would need to keep the truck for at least two days just to diagnose the problem. I was concerned that even after two days, they still might not be able to identify the source of the rattle before giving the truck back to me. I had also asked a few dealerships about this issue during previous service visits, but none of them seemed to know what was causing it or had a solution. That's why I decided to contact GM directly first, hoping they might already have an official repair procedure or guidance for this issue.   I also hope GM eventually comes up with an official fix for this problem. I have a feeling there are many Silverado owners experiencing the same rattle, but most either choose to live with it or simply don't know what the cause is.   Really appreciate you taking the time to document your diagnosis. Your post is still making a difference years later.
    • Buckwild27
      Gas Prices

      By Buckwild27 · Posted

      I have 2 choices. 

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...