Jump to content
  • Sign up for FREE! Become a GM-Trucks.com Member Today!

    In 20 seconds you can become part of the worlds largest and oldest community discussing General Motors, Chevrolet and GMC branded pickups, crossovers, and SUVs. From buying research to owner support, join 1.5 MILLION GM Truck Enthusiasts every month who use GM-Trucks.com as a daily part of their ownership experience. 

Parking brake warning light and flashing check engine light


Recommended Posts

Very similar to another poster 2 years ago.  Parking brake light comes on solid, check engine light flashes and adaptive cruise disabled.  30 seconds later all warning indications go away and transmission downshifts are really hard.  17,875 miles.

 

Thoughts?

Link to comment
Share on other sites

12 hours ago, calgator73 said:

Very similar to another poster 2 years ago.  Parking brake light comes on solid, check engine light flashes and adaptive cruise disabled.  30 seconds later all warning indications go away and transmission downshifts are really hard.  17,875 miles.

 

Thoughts?

This is certainly not what we like to hear, calgator73.  Please know, customer satisfaction is extremely important to us. Our team would be more than happy to take a closer look into the concerns with your 2020 Sierra AT4. To do so, please send an email to [email protected] with ATTN: calgator73/GM Trucks in the subject line.

Please include your contact information, VIN, a brief description of your concern, and the name of your preferred dealership. We look forward to hearing from you. To learn more about GM’s privacy policy, please visit https://www.gm.com/privacy-statement.html.
 
Privacy Statement | General Motors
Your privacy is important to General Motors. This Privacy Statement addresses the personal information GM collects and how GM handles that personal information.
www.gm.com
 

Link to comment
Share on other sites

Follow-up.  Dropped at dealer after loud whining that varied with RPM started coming from under truck.  Service writers even turned their head to see.  Guess we'll see if it's a CND and operating "normally".

Link to comment
Share on other sites

  • 2 weeks later...
  • 4 weeks later...

So just read this post and same thing happened to me yesterday in my 2020 Silverado 3500 diesel while towing the boat and coming back from a trip to the keys.  STRANGEST THING HAPPENS NEXT!! My brother in law who has identical truck as mine following right behind me has the exact same thing happen to his truck at the exact same time as mine. We both pulled over thinking GM just sent a signal to disable our trucks.  After a couple of starts on and off it cleared and never did it again. Parking brake error, check engine light, turned off cruise and tow mode, reduced power and traction control light came on. How could this happen to two trucks at the same time unless it was sent over the air???

Link to comment
Share on other sites

20 hours ago, ssowie said:

So just read this post and same thing happened to me yesterday in my 2020 Silverado 3500 diesel while towing the boat and coming back from a trip to the keys.  STRANGEST THING HAPPENS NEXT!! My brother in law who has identical truck as mine following right behind me has the exact same thing happen to his truck at the exact same time as mine. We both pulled over thinking GM just sent a signal to disable our trucks.  After a couple of starts on and off it cleared and never did it again. Parking brake error, check engine light, turned off cruise and tow mode, reduced power and traction control light came on. How could this happen to two trucks at the same time unless it was sent over the air???

Man about 2 weeks ago, this same thing happened to me!!! 2020 Silverado 1500 LTZ. I had to unplug ECM and reset it otherwise the truck wouldn't even start. 

Link to comment
Share on other sites

On 8/21/2022 at 9:02 PM, ssowie said:

So just read this post and same thing happened to me yesterday in my 2020 Silverado 3500 diesel while towing the boat and coming back from a trip to the keys.  STRANGEST THING HAPPENS NEXT!! My brother in law who has identical truck as mine following right behind me has the exact same thing happen to his truck at the exact same time as mine. We both pulled over thinking GM just sent a signal to disable our trucks.  After a couple of starts on and off it cleared and never did it again. Parking brake error, check engine light, turned off cruise and tow mode, reduced power and traction control light came on. How could this happen to two trucks at the same time unless it was sent over the air???

 

This is certainly not what we like to hear, ssowie.  Please know, customer satisfaction is extremely important to us. Our team would be more than happy to take a closer look into the concerns with your 2020 Silverado 3500. To do so, please send an email to [email protected] with ATTN: ssowie/GM Trucks in the subject line.

Please include your contact information, VIN, a brief description of your concern, and the name of your preferred dealership. We look forward to hearing from you. To learn more about GM’s privacy policy, please visit https://www.gm.com/privacy-statement.html.
 
Privacy Statement | General Motors
Your privacy is important to General Motors. This Privacy Statement addresses the personal information GM collects and how GM handles that personal information.
www.gm.com
 

Link to comment
Share on other sites

On 8/22/2022 at 5:56 PM, jules lemaire said:

Man about 2 weeks ago, this same thing happened to me!!! 2020 Silverado 1500 LTZ. I had to unplug ECM and reset it otherwise the truck wouldn't even start. 

This is certainly not what we like to hear, jules lemaire.  Please know, customer satisfaction is extremely important to us. Our team would be more than happy to take a closer look into the concerns with your 2020 Silverado 1500 LTZ. To do so, please send an email to [email protected] with ATTN: jules lemaire/GM Trucks in the subject line.

Please include your contact information, VIN, a brief description of your concern, and the name of your preferred dealership. We look forward to hearing from you. To learn more about GM’s privacy policy, please visit https://www.gm.com/privacy-statement.html.
 
Privacy Statement | General Motors
Your privacy is important to General Motors. This Privacy Statement addresses the personal information GM collects and how GM handles that personal information.
www.gm.com
 

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

 Share



×
×
  • Create New...

Important Information

By using this site, you agree to our Terms of Use.