Jump to content

Temporary Instrument Cluster Issue When Shifting Into Gear

TX_Chevy_Guy
 Share

Recommended Posts

TX_Chevy_Guy New Member

TX_Chevy_Guy

Posted
Posted

Hi everyone, 

 

I have a 2015 Silverado 1500 6.2L LTZ with ~150k miles. Recently I've had this weird electrical gremlin pop up that I'm hoping some of you may be able to help me track down. 

The problem occurs on initial startup of the truck, when I'm shifting out of park, the following gauge cluster/DIC oddities occur:

  • The red shift indicator sometimes disappears or flashes momentarily as I pull the lever down to various positions. 
  • One or more of the DIC messages below pop up in quick succession such as:
    • Tire Monitor System
    • Trailer Brake System
    • Theft Deterrent System
    • Park Assist Off
    • Stabilitrak 
  • All gauge needles will briefly go all the way to the left, and then immediately return to normal.

 

This is only temporary, and I must stress, none of the systems outlined above seem to actually be defective. The truck, engine, transmission, etc. run perfectly fine. This is the only issue that occurs. Even when the red shift indicator disappears/flashes momentarily, the truck is actually shifting through the gears. None of these gauge issues or alerts ever crop up while driving, this only occurs after starting the truck and initially shifting into reverse or drive to leave the house/work. 

 

I had my Duralast Platinum battery replaced at Autozone under warranty last week to rule out any weird battery issue as it was nearing the three-year mark since I bought it. I cleaned the connector clamps thoroughly before installing the new battery.

Oddly, the problem seems to occur more predictably when it is hot out (Houston, TX here). There have been a number of mornings where when I am backing out of the garage, it doesn't occur (not every single time, but a lot). Then later in the day when I'm parked out in the sun at work and go to lunch it almost always crops up.

To me it sounds like some sort of grounding/resistance problem. I have crawled under the truck and found two grounds on the frame, one on the driver side and one on the passenger side; removed those and cleaned them thoroughly and bolted them back down tight. I've also read about and watched a couple of YouTube videos regarding the ground in the cab, under the dash by the A pillar next to the driver side speaker near the windshield. I haven't had the time to get to this one yet, but it is probably going to be my next stop. Apparently sound deadening insulation can be trapped between the ground and the metal it is bolted to, causing high resistance and weird electrical issues. However, it seems like this is something that occurs at the factory, and in my mind it's a bit weird I've never had any other weird electrical gremlin like this until very recently with this problem so I'm not convinced this is the culprit.

 

Any suggestions on where to look or what to do next? 

 

 

rav3 Senior Enthusiast

rav3

Posted
Posted (edited)

It does sound like a bad/weak ground. Before I'd do anything else, do check tge ground by the A pillar. It is a known issue for this problem. 

Here's a video I found in case you haven't found one.

 

 

Edited by rav3
  • Like 1
TX_Chevy_Guy New Member

TX_Chevy_Guy

Posted
  • Author
Posted

Thank you for the response. That guy is one of the videos I watched along with this other one below from another guy on YouTube called Tony Lester. I also watched the video at the bottom of this post from Dustin T where he goes into a bit more detail about the symptoms he was experiencing.

 

These guys symptoms are somewhat similar to mine, apart from theirs also seems to occur when they are driving which mine doesn't fortunately. Also, fortunately I have not had the wheel jerkiness described by Tony at the end of his video.

 

After doing a little more research, it looks like there is also a grounding point under the truck near the starter that I'm also going to take off and clean thoroughly. My initial thoughts were that it was some exposed ground that had gotten filthy and grimy and was causing these intermittent issues.

 

Either today or tomorrow I plan on cleaning both of these grounding points up (by the starter and the one next to the speaker) and will report back my findings.

 

 

 

 

TX_Chevy_Guy New Member

TX_Chevy_Guy

Posted
  • Author
Posted
1 hour ago, jrmcswain said:

Has the head been off fir work? The ground on the back of the driver's side head can cause some of those messages.

 

 

Nope, never been removed. I'll inspect this grounding point as well though for peace of mind when I get around to it. Is it easily accessible, or does anything need to be removed to get to it?

mikeyk101 Senior Enthusiast

mikeyk101

Posted
Posted (edited)

Take a look at this video as well. It talks about a braided strap ground that just corrodes away and this guy replaced it with a thicker gauge insulated wire to fix it. Although not quite the same symptoms you have, I believe you are on the right track by checking all the grounds.

 

https://m.youtube.com/watch?v=ZnCj1m6Geb8

Edited by mikeyk101

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   4 Members, 0 Anonymous, 2,256 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...