6.6 Gas Check Engine Light

Stand By · May 23, 2023

2020 6.6 Has Custom Still not quite 30,000 miles. My 3 year bumper to bumper warranty expired April 30. Just a few days before, my orange CE light comes on. Only thing noticeable was that it would not allow remote start. It didn't seem to go into any other default settings. So I went on line to schedule my service. They can't get me in for a couple of weeks. Finally get serviced a few days after having changed the air filter and an oil change an the u tell me my purge canister is bad. Will be almost $300. So I ask about the warrant, having scheduled the service prior to the expiration. They say it's a no go, as GM will only go off the date the computer is connected to the truck. This northern Michigan dealer is below par anyway, may get a hold of another dealer a couple hours away this time. So I get the truck back and the light is out. They cleared the code, without having saying anything and all was back to normal. Now a week and a half later, the truck won't start via remote this morning and the light is back on. I haven't looked to see how difficult it is to get to the cannister yet. Wondering if anybody else is seeing a CEL much? Looks like I'll probably start looking into a catch can. I love this truck, but if this is gonna be a thing, I'll start reviewing my options.

Any GM customer service listening? 6.6 gas, 29650 +/- miles.

64BAwagon · May 23, 2023

The purge canister and the evap system is part of the emissions warranty and is covered for longer than 3/36

Time to find a smarter dealer service dept.

The remote start will not function with a CEL on. Until the issue if fixed the remote start will stay non functional.

diyer2 · May 23, 2023

Glad you got that off your chest.

Stand By · May 23, 2023

10 minutes ago, 64BAwagon said:

The purge canister and the evap system is part of the emissions warranty and is covered for longer than 3/36

Time to find a smarter dealer service dept.

The remote start will not function with a CEL on. Until the issue if fixed the remote start will stay non functional. Thanks for the warranty tip. That was helpful.

Stand By · May 23, 2023

11 minutes ago, diyer2 said:

Glad you got that off your chest.

Appreciate the support. Go team.

64BAwagon · May 23, 2023

If you can find someone to pull the code that would be helpful info. At least then you could have some info for diagnosing it.

Stand By · May 23, 2023

Yeah, I should've secured the code bwfore posting. I plan to get a copy of the last scan for the next appointment, but cant get their until Thursday.

treadmatt · May 26, 2023

I recommend visiting their official website or contacting their customer service hotline

Stand By · May 27, 2023

I'll let you guys know what happens. Been working a long stretch, including this weekend. In the mean time. Having a couple Trail 7 Stouts tonight to partake with the festivities.

GMCustomerService · June 1, 2023

On 5/23/2023 at 8:25 AM, Stand By said:

2020 6.6 Has Custom Still not quite 30,000 miles. My 3 year bumper to bumper warranty expired April 30. Just a few days before, my orange CE light comes on. Only thing noticeable was that it would not allow remote start. It didn't seem to go into any other default settings. So I went on line to schedule my service. They can't get me in for a couple of weeks. Finally get serviced a few days after having changed the air filter and an oil change an the u tell me my purge canister is bad. Will be almost $300. So I ask about the warrant, having scheduled the service prior to the expiration. They say it's a no go, as GM will only go off the date the computer is connected to the truck. This northern Michigan dealer is below par anyway, may get a hold of another dealer a couple hours away this time. So I get the truck back and the light is out. They cleared the code, without having saying anything and all was back to normal. Now a week and a half later, the truck won't start via remote this morning and the light is back on. I haven't looked to see how difficult it is to get to the cannister yet. Wondering if anybody else is seeing a CEL much? Looks like I'll probably start looking into a catch can. I love this truck, but if this is gonna be a thing, I'll start reviewing my options.

Any GM customer service listening? 6.6 gas, 29650 +/- miles.

This is certainly not what we like to hear, Stand By. 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 Chevrolet Silverado 2500 HD. To do so, please send an email to [email protected] with ATTN: Stand By/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. The information you provide may be monitored and recorded and is subject to the GM Privacy Statement.

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