Jump to content

Recommended Posts

Posted

I had the same problem as xeyedjohn, thought I had bad gas because it started having issues after filling up with fuel. Same trouble lights were on and engine was misfiring. Stopped for something to eat and it wouldn’t start at all. Had it towed 100 miles home to my dealer. Dealer said it was a blown fuse in a panel that controls many things including the lifters or something on the cylinders which was causing the misfires. They said it is becoming a common problem and the gm engineers are trying to figure out why the fuse is blowing. They replaced the fuse, gave it back to me, ran great for a day and started doing the same thing this morning. I’ll give an update when I hear back from the dealer again. 

Posted
On 8/25/2020 at 9:47 AM, MCM3M said:

2019 Sierra 6.2 Denali - "Service Parking Brake"  occurs regularly. About 2 mo ago dealer installed "software update". Message disappeared for about 3 weeks. Now occurring again daily. In my case I can "clear it" by setting and releasing the brake while in Park. Very annoying. Going back in to the dealer Monday for this and oil change....

So, I picked it up today. They replaced the Parking Brake push button switch on the dash. We'll see if this fixes it...

Posted

I hadn't heard from the dealer since 9/2 so I called today for an update.  They told me they had replaced the injectors on #7 and #8 cylinders and they were working fine but then all of a sudden all the cylinders on one side were missing and not holding the correct pressures.  The technician was in the process of troubleshooting and said he had never seen anything like it.  He though it may be an imperfection in the cylinder.  I said what is the resolution, replace the motor?  They couldn't tell me today since they are still in the process of troubleshooting.  They said they should have an answer for me by Monday.  They were kind enough to offer me a vehicle but I declined, my 05  F150 is still running strong, thankfully.   Will update when i get more info.

  • 3 months later...
Posted

Has anyone got this fixed yet we have our 2020 3500hd  in for the same issue and the told me this is the first time that they've seen this problem we are getting ready to head to Florida the end of this week 

Posted

Had service parking brake come on this am in my 2019 1500 rst with 8,000 miles. Taking it in to the dealer in 4 days, but the light did go off throughout the day and has not yet returned. I was reading in the owners manual, and if this occurs and you need to set or release the parking brake, you need to press and hold the button. That way you wont be stuck ?

  • 2 weeks later...
Posted (edited)
On 12/18/2020 at 7:23 PM, ddevos said:

Had service parking brake come on this am in my 2019 1500 rst with 8,000 miles. Taking it in to the dealer in 4 days, but the light did go off throughout the day and has not yet returned. I was reading in the owners manual, and if this occurs and you need to set or release the parking brake, you need to press and hold the button. That way you wont be stuck ?

So after being at the dealer they couldn't find any issues and claimed no stored codes. They did some update, well today jan 2 it happened again but again went off after I parked. Both times the weather was nice and lots of moisture from melting snow. I wonder if something is getting wet/frozen causing the error.

Edited by ddevos
Posted
31 minutes ago, ddevos said:

So after being at the dealer they couldn't find any issues and claimed no stored codes. They did some update, well today jan 2 it happened again but again went off after I parked. Both times the weather was nice and lots of moisture from melting snow. I wonder if something is getting wet/frozen causing the error.

Check to make sure the under hood fuse box bolts are tight. There is a TSB for this. Causes all kinds of odd electrical issues. In my case dash would randomly not come on when truck was started and some transfer case issues. Also if I disconnected the battery I would have all kinds of brake/stabilitrak/check engine lights and lots of code (none after fix). I got 2 to 3 turns on mine and no issues since. I have posted the actual TSB in the past but can't find it at the moment (I'm not at home).

I thinks they are 7 or 8mm bolts. Torque spec is 53 inch-lbs.

 

Jay

Posted
1 hour ago, Jay P said:

Check to make sure the under hood fuse box bolts are tight. There is a TSB for this. Causes all kinds of odd electrical issues. In my case dash would randomly not come on when truck was started and some transfer case issues. Also if I disconnected the battery I would have all kinds of brake/stabilitrak/check engine lights and lots of code (none after fix). I got 2 to 3 turns on mine and no issues since. I have posted the actual TSB in the past but can't find it at the moment (I'm not at home).

I thinks they are 7 or 8mm bolts. Torque spec is 53 inch-lbs.

 

Jay

Huh, I will check this and report back. Thanks for the advice!

Posted

Parking brake and rough running:  I have had this same issue since I drove it off the lot.  It would occasionally do it.  Almost always after using trailer or offroad mode then going back to normal mode.  Finally took it in.  They did get some good codes.

 

All I know is it is some issue with the #4 cylinder.  I will updated you as soon as I get specifics and also a solution.

Posted

I had a software update, that cost a little bit, but I have not had an issue in a long time.  

 

I back into the driveway that has a pretty good slope.  I was told that apparently, because I was on such a slope that the truck "felt" movement once I put it into park and would engage the parking brake.  Every time, I would have to disengage the parking brake because it was on.  I have no problem with this, just became a habit.

 

I was told that if I had engaged the brake before removing the foot brake that I wouldn't get the notice.  I am just lazy i suppose, but the update did fix it.  Not sure if it could help in your case.

Posted

Good after noon all. I was just reading the posts in this topic as My 2020 is having these issues as well. I had my 2020 Sierra towed in on Wednesday this week and called for an update on Friday. The dealership said they pulled codes for misfire on all cylinders but more on 3&8. My truck was flashing the check engine light (I think) a couple weeks ago and then on Wednesday it showed service parking brake and traction control as well as a flashing check engine light. Dealership has road tested twice now and can not duplicate. Both times I did not notice a change in operation which makes me think computer issues. Both times this happened shortly after starting the truck and claiming the same hill in the same spot. This is not a big hill by any means with a 3-4% incline. Also found that after a radio software update my radio will play both xm and Bluetooth at the same time which is odd the dealership brought in a specialist for that snag lol. 

 

I will update when they resolve this for everyone to see 

 

2020 SLT-T1 Sierra Elevation 5.3 with 15K KMs 

  • 2 weeks later...
Posted
On 1/2/2021 at 5:30 PM, ddevos said:

Huh, I will check this and report back. Thanks for the advice!

Checked,and nice and tight no difference. Light came on a 3rd time. Taking it in on monday jan 18

Posted
On 1/2/2021 at 3:46 PM, Jay P said:

Check to make sure the under hood fuse box bolts are tight. There is a TSB for this. Causes all kinds of odd electrical issues. In my case dash would randomly not come on when truck was started and some transfer case issues. Also if I disconnected the battery I would have all kinds of brake/stabilitrak/check engine lights and lots of code (none after fix). I got 2 to 3 turns on mine and no issues since. I have posted the actual TSB in the past but can't find it at the moment (I'm not at home).

I thinks they are 7 or 8mm bolts. Torque spec is 53 inch-lbs.

 

Jay

Checked, and nice and tight no difference. Light came on a 3rd time. Taking it in on monday jan 18

Posted
On 1/17/2021 at 8:24 PM, ddevos said:

Checked, and nice and tight no difference. Light came on a 3rd time. Taking it in on monday jan 18

Dealer found code c060b left rear parking brake actuator fault. After checking wiring, they determined issue was the actuator. Replaced. So far so good for the service parking brake.

  • 4 months later...
Posted
On 8/10/2020 at 4:06 PM, xeyedjohn said:

I have a 2020 Silverado LTZ 6.2L with 4500 miles and after slowing down and accelerating again I noticed it was running very rough and seemed to be missing.  The Service ESC first came up and then the check engine light came on.  Shorty after the wrench and parking brake light came on, and I also noticed the whole time the traction control ight was illuminated.  Then the error message went to service parking brake.  This is some BS.  Will update when and if I get a resolution.

Service Praking Brake.JPG

Service ESC.jpg

Steering Assist.JPG

 

On 8/10/2020 at 4:06 PM, xeyedjohn said:

I have a 2020 Silverado LTZ 6.2L with 4500 miles and after slowing down and accelerating again I noticed it was running very rough and seemed to be missing.  The Service ESC first came up and then the check engine light came on.  Shorty after the wrench and parking brake light came on, and I also noticed the whole time the traction control ight was illuminated.  Then the error message went to service parking brake.  This is some BS.  Will update when and if I get a resolution.

Service Praking Brake.JPG

Service ESC.jpg

Steering Assist.JPG

I just had the same thing happen to my 21 Silverado RST 6.2. it was running so bad I had it towed to the dealer.

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
  • 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, 2,881 Guests (See full list)


  • Latest Articles

  • Posts

    • My 2015 1500 LTZ Silverado suddenly won't go into 4 x 4 low. It will go into 4 x 4 high.
    • 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?
    • 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. 
    • 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. 
    • Monday looks like a good day for the dealer to test an ac issue. Hopefully it all turns out good.
  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...