Jump to content

Blinking Check Engine Light

egpilot13
 Share

Recommended Posts

egpilot13 Enthusiast

egpilot13

Posted
Posted

1100 miles on my 2020 Silverado RST 5.3L. 
Got blinking check engine light continuously for about 3-5 minutes while driving. It would temporarily extinguish when I pushed the accelerator. No associated messages or error codes. All engine parameters seemed normal. 
It stopped blinking and went away on its own. No idea. A bit disconcerting on a brand new truck though. 

CamGTP Senior Enthusiast

CamGTP

Posted
Posted

There will be a history code stored, you'd have to scan it with a OBD2 code reader to see what it says.

egpilot13 Enthusiast

egpilot13

Posted
  • Author
Posted (edited)

Right on. Thanks for the response. I’m curious to find out. I drove the truck all day today. No blinking light. Keeping my fingers crossed. Still unsettling though. 

Edited by egpilot13
Gangly Senior Enthusiast

Gangly

Posted
Posted

Take it to autozone or a similar parts store and they will scan it for free for you.  A flashing check engine light is generally a misfire though.  Good luck!

egpilot13 Enthusiast

egpilot13

Posted
  • Author
Posted
7 hours ago, Gangly said:

Take it to autozone or a similar parts store and they will scan it for free for you.  A flashing check engine light is generally a misfire though.  Good luck!

Didn’t know they did that. Will definitely stop by. Thanks! I hope you are right about the misfire. 

Bobaloo22 Enthusiast

Bobaloo22

Posted
Posted

Our trucks are famous for the "misfire" code. If I nail it and hold it for a few seconds mine will do it some time.

egpilot13 Enthusiast

egpilot13

Posted
  • Author
Posted
1 minute ago, Bobaloo22 said:

Our trucks are famous for the "misfire" code. If I nail it and hold it for a few seconds mine will do it some time.

Interesting...I sure hope that was the case. My first Chevy. Don’t get me wrong. I love the truck. Just don’t want to be part of the horror stories I hear sometimes. 

Bobaloo22 Enthusiast

Bobaloo22

Posted
Posted

The first time mine did it was when my truck was fairly new, it scared the crap out of me so I bought an OBD scanner. I would not worry about it, when it stays on then it can be more serious.

Salsa De Piña Enthusiast

Salsa De Piña

Posted
Posted
2 hours ago, egpilot13 said:

I no longer have OnStar subscription. 

You may no longer have safety and security, but vehicle diagnostics is good for 10 years.  How else will they keep pestering you to go to the dealership for service?

Spyderwebb Enthusiast

Spyderwebb

Posted
Posted (edited)

My CEL light came on for a while the other day (solid, not blinking), went by the dealership and had them read the code.  It was showing it stored codes U0100, P25A2, U0146 .  These had something to do with the brakes (some sending unit or other). 

 

At my service visit yesterday they performed TSB 20NA155, which I understand was a reprogramming of the computer.  They advised that fixed the issue?

 

The Service Advisor told me that if the CEL light was on but not blinking it's ok to continue to drive the vehicle until you can schedule maintenance.  However if it is blinking then you should get it in right away!

Edited by Spyderwebb
1997SierraSLT Enthusiast

1997SierraSLT

Posted
Posted

Get used to it.  If a P0300 code, it is infamous for GM owners since the 1980's as they still haven't figured out how to manufacture a reliable fuel injection system.

 

Might as well purchase an OBD-II scan tool because you're going to be using it frequently owning a GM vehicle.

  • 2 years later...

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

    • DaleB
      No Software Updates - Old Build

      By DaleB · Posted

      Thanks, all. It sounds like keeping the software "as is" is the best course of action.
    • Grumpy Bear
      The Peckish Synapse

      By Grumpy Bear · Posted

      https://en.wikipedia.org/wiki/Overengineering   Excerpt from the above link: (BTW the above is a 90 second read)   [Quote]   A story about very precise engineering is given in the 1858 story The Deacon's Masterpiece or, the Wonderful "One-hoss Shay": A Logical Story by Oliver Wendell Holmes Sr., which tells of a carriage (one-horse shay) Because it had been engineered so that no single piece failed first – no piece was over-engineered relative to the others, and they thus all collapsed at the same time. A similar quote by Ferdinand Porsche claimed "the perfect race car crosses the finish line in first place and immediately falls into pieces."[5]   [End Quote}   By Engineering's  own definition then; the AFM and Torque Converters, 4-5-6 clutch assembly of the 6L80E, and a dozen other common chronic parts and systems failures are "UNDER ENGINEERED". And by their own definition done so with INTENT. Ya can't have it both ways OEM's.     
    • Spendit
      Installing tow mirrors

      By Spendit · Posted

      Everything you need to know..... https://www.gm-trucks.com/forums/topic/198157-2014-2017-dl8-dl3-towing-mirror-upgrade-–-mirrors-explained/
    • Gangly
      Broke Down on the Mountain

      By Gangly · Posted

      I was in Utah this week attempting a bow hunt in the Wasatch mountains with friends.  On the evening of the first hunt, making my way across a ridge to a friends camp, the upper control arm on the driver's side separated, the CV axle got trashed, and the wheel was dang near at a 45 degree angle to the ground.  I was able to get it towed off the mountain and into town about 3:00 am, and spent the remainder of the night in an O'Reilly's parking lot.  Luckily, there was a Chevrolet dealership not to far away so I was able to get to the dealership and pick up a new CV and UCA.  It would have been a few days before they could have gotten to the truck and I brought tools with me on hunt since it was a two day drive to get there, so I did the repairs myself in the O'Reilly's parking lot.      What's interesting is that the UCA ball joint didn't break, it just popped out of the bottom of the UCA.  There was VERY LITTLE evidence of grease on the ball joint or in the socket, and you could see where the ball joint had warbled out part of the socket over time.  I guess that's what happens over 186K miles of use :)   Big Kudos to O'Reilly's for letting me work on the truck in their parking lot.  However, they made a $150+ off of me from the purchase of various tools, so I guess it was in their best interest anyways :)   Getting towed off the mountain.   UCA Ball Joint Socket   Trashed CV   Suspension disconnected and UCA and CV Removed   New UCA and CV installed with the suspension buttoned up.    
    • KARNUT
      What did you do to your "other" car (aka musclecar) today

      By KARNUT · Posted

      My family still laughs at me when they see me drive up in the minivan. Same with less than a V-8 truck. It helps that I have choices. I don’t think I could only have a minivan as the one and only vehicle as much as I like it. And I wouldn’t pass up a good buy on an older V-8 reg cab GM truck. Could you live Raven as the only ride?

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...