Jump to content

2019 sierra AT4 P062f-00

Fowler
 Share

Recommended Posts

Fowler Enthusiast

Fowler

Posted
Posted

I have a 2019 Sierra AT4 with a 5.3 engine. After experiencing a ground failure and replacing that along with a new battery, I found that I was left without 4WD. I scanned the system, but it didn’t show a TCCM (Transfer Case Control Module), so I thought it might be due to my cheap scanner. I upgraded to a new scanner, but it still didn't show the TCCM. However, when I unplugged the fuse for the TCCM and reinstalled it, I scanned again, and now it shows the TCCM with the code P062F-00.

My question is: Is there something I can try to get the 4WD working again, or am I looking at needing a new TCCM or addressing something else entirely? I tried clearing the code, but it keeps coming back. All the other codes cleared except for one related to the battery for the key fob, which persists after I installed new batteries. Additionally, the left-side camera has failed, but getting the 4WD back up and running is my main priority.

2019_GMC_Sierra_1GTP9EED0KZ160844_Report_2025-08-27 0452.pdf

davester Senior Enthusiast

davester

Posted
Posted

Well, you might go through the diagnostic procedure for that code, to find what is causing it.  The TCCM might need to be replaced, but it might just have a bad power or ground connection, or something else causing it.

 

alldata.com will have a vehicle-specific diagnostic procedure you can work through, to find the cause, to then fix it.

Tom73 Enthusiast

Tom73

Posted
Posted

Here is some general info found online. May be somewhat helpful. 
_____________________________
 

What Does the P062F Code Mean?

The P062F code specifically refers to a failure within the PCM’s internal EEPROM (Electrically Erasable Programmable Read-Only Memory). This memory is crucial for storing data and configurations that allow the PCM to manage the engine and other components effectively.

What Causes the P062F Code?

Several factors can trigger the P062F code, including:

  • Control module failure
  • Powertrain Control Module (PCM) failure
  • Wiring issues that affect communication to and from the PCM

What Are the Symptoms of the P062F Code?

When the P062F code is present, you may notice the following symptoms:

 
  • Illumination of additional warning lights on the instrument cluster
  • Potential performance issues related to engine management
  • Unresponsive vehicle systems controlled by the PCM

How Serious Is the P062F Code?

The P062F code is classified as urgent, indicating that immediate attention is necessary. Ignoring this code can lead to significant damage to the vehicle’s systems and may pose safety risks to the driver and passengers.

How to Diagnose the P062F Code

To accurately diagnose the P062F code, follow these steps:

  1. Use an OBD-II scanner to confirm the presence of the P062F code and check for any accompanying codes.
  2. Inspect the wiring and connectors related to the PCM for any signs of damage or corrosion.
  3. Perform a visual inspection of the PCM itself for any physical damage.
  4. Check the vehicle’s battery and charging system, as electrical issues can affect the PCM’s performance.
  5. Consider running a PCM self-diagnosis test if available.

Common Repairs for the P062F Code

Repairing the P062F code may involve:

  • Replacing the faulty PCM
  • Repairing or replacing damaged wiring and connectors
  • Resetting the PCM and reprogramming if necessary

How Much Does It Cost to Fix the P062F Code?

The cost to fix the P062F code can vary widely depending on the specific issue and whether you need to replace the PCM. On average, you can expect to pay:

  • PCM replacement: $800 – $2,500
  • Wiring repairs: $100 – $500

Can I Fix the P062F Code Myself?

While some aspects of diagnosing and repairing the P062F code can be tackled by experienced DIYers, such as inspecting wiring and connectors, replacing the PCM typically requires specialized knowledge and tools. For most vehicle owners, it is advisable to consult with a professional mechanic to ensure proper diagnosis and repair.

Fowler Enthusiast

Fowler

Posted
  • Author
Posted

I was reading about this on Google the other day, and my situation is that there is no engine light on and I have no issues other than the fact that my four-wheel drive (4WD) isn't working. Everything else is functioning perfectly. 

This problem started after I had a bad ground issue, which led to a no-start condition. I found and replaced the faulty ground, but now I can't engage the 4WD. Initially, the Transmission Control Module (TCCM) wasn't showing up until I pulled out the fuse and reinstalled it. Now, I have a long-term memory issue, and the code is showing up under my TCCM module. I'm not sure if the problem might be related to the Transmission Control Module (TCM).

Fowler Enthusiast

Fowler

Posted
  • Author
Posted

i was talking with a guy to day he said that the transfer case motor is a big problem with them so gonna throw a rock in the dark and hope it works

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

  • Recently Browsing   0 members

    • No registered users viewing this page.

  • Forum Statistics

    250.4k
    Total Topics
    2.7m
    Total Posts

  • Member Statistics

    342,759
    Total Members
    8,960
    Most Online
    DM22
    Newest Member
    DM22
    Joined

  • Who's Online   2 Members, 0 Anonymous, 2,867 Guests (See full list)

  • Latest Articles

  • Posts

    • B14Sierra
      Cam chain tensioner question

      By B14Sierra · Posted

      So I'm in the middle of a DOD AFM delete on my 6.2 L86 Sierra. I had a pick holding the tensioner but after I got the Cam phaser gear off I was cleaning off all the rtv and apparently I didn't have the pick seated far enough in. I bumped it and the tensioner sprang forward.  I think everything is good but I want a second opinion. The top of the tensioner is just a looped piece of plastic that rides in that channel right? There is no spring or anything is there? I got the gear and chain back on and it seems tight and everything looks right. I'm hoping nothing fell out.
    • dna9656
      No low range 4 x 4

      By dna9656 · Posted

      My 2015 1500 LTZ Silverado suddenly won't go into 4 x 4 low. It will go into 4 x 4 high.
    • asilverblazer
      Transmission Woes :-(

      By asilverblazer · Posted

      Yep, just a quick reference point.    My main point being I’d do a thousand other things before I’d pay 10k for a transmission.    Speaking in ignorance cause I don’t look at these trucks, what is it worth? 20k?
    • asilverblazer
      Intermittent no-code issues on 2022.5+ V8 trucks — what did the shop fail to capture?

      By asilverblazer · Posted

      I think users are going to want to pick their monitored parameters, which parameters they want to see first.    It should probably start with baseline at a minimum and adjust to learned, but be able to overlay baseline for comparison.   A simple severity level would be able to determine what type of alerting is appropriate or user selectable.    Why not use the OBD port though?   I think a phone connection would be a good idea, push notifications type deal.   Number 1 issue is having data is useless if you don’t know what the data should be under normal conditions. 
    • Chuck FB
      summer road trips in the 2026 2500HD

      By Chuck FB · Posted

      I thought I would use your thread and add to it as I just did my first longer drive with my truck in the last couple of days. I drove from the Grande Prairie area of Alberta down to Edmonton and most of where I drove in the city was the ring road so fairly free flowing but a bit of stop and go as well in the city. Stayed the night and returned home and not too many stops along the way each way but every restart and certainly every cold start sets it back for fuel mileage. Why I say that is I see some people will cherry pick a fuel mileage leg after the vehicle had been warmed up driveline wise before hand and its a forgiving ( easy rolling drive leg for example ) and call that their fuel mileage which can give a false perception of reality. I was not heavily loaded at all but never the less the flip bak cover, rubber bed mat, various tools etc and extra jerry cans of fuel all way up to a few hundred pounds of dead weight so its not an empty truck. The cold inflation tire pressures are set more near the freezing point so once they are warmed up driving I was showing 45 front and over 40 rear and realize high inflation pressures would help a little in fuel mileage but certainly not the ride on our crap sections of highway. The weather was good so was not raining as that can really drag mileage down, in fact I had a bit of a tail wind on average driving home. Most people on here would never have driven on that freeway to visualize it but its got a fair bit of rolling type of landscape with numerous river valleys. For the most part I had it on cruise set to 62 although kicking it off if I caught it in time before it started down shifting and self braking going down the grades. Most of the more substantial grades its shifting into 7th I believe as 8th just doesn't have it. Total distance round trip was 643 miles and my overall average and I did refuel three times in all, figured out to 17.65 miles per US gallon. My best fuel mileage section refuel within all of this figured out to 18.46 and these are all hand calculated figures. I find if anything that the trucks computer can be over optimistic, sometimes its pretty close but other times its stretching it. On paper persay in theory the truck would have just about made it on fumes for that whole drive without refueling once.    Which made me think of the topic thread of the wonder if these trucks could do 20 mpg and that is a good question, certainly would have to be on an easy going flat highway, no head wind, the right temperature, not packing around a bunch of dead weight and puttering along even slower than I was I would suspect and going steady and not stopping to smell the flowers or take a piss !. It probably is possible but not without effort to attain that with the wind resistance and weight of these trucks. Of course on my drive most people are passing me if they have the power as per loaded highway tractors, never mind a lot of speedy vehicles but the speed limit is 68 and most are at or well over that. 

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...