2022 Sierra 1500 Pro 4cyl Turbo - Issues with the engine

pentatonic145 · January 11

Hi Team - my dealership is struggling to figure out this problem - I'm wondering if anyone else out there has experienced or heard about something similar.

Truck was purchased brand-new in December of 2022 and has 18k miles on it today. It has an interlock system that was installed in February of 2023 (the device I have to blow in before I can start the engine to prove I'm not drunk). It's a SmartStart interlock system.

Around September for 2023 I had the oil changed at a Mike Maroone GMC in Boulder. After this I started noticing a noise when accelerating and decelerating. It's not the typical high-pitched noice of the turbo spinning up. To me it sounds more like a police siren. This video shows the noise:

It's like a "woooooooo WOOOOOOOOo" noise

After a while, I got the error message "Reduced Acceleration - Drive With Care" and a solid orange engine light. NOTE: I only get the "Reduced Acceleration" message periodically, when driving over 55 mph uphill. It goes away after turning the engine off and stays off for weeks until I accelerate up a steep hill again. The orange engine light goes away when the truck is very cold.

I brought my truck to Foundations Chevy/Cadillac/GMC and they looked at it. The tech said the Interlock installation caused a leak to the air intake and they replace these parts:

This fixed NOTHING!!! Still check engine light, still "Reduced Acceleration" message, still "woooo WOOOOOOoooo" sound.

Brought it back to them and they said "well, maybe it's the turbo - let's replace the turbo". Now I've been waiting for over a month for the turbo part to arrive - it hasn't arrived and the dealership tells me it's backordered with no ETA.

What I'm wondering is:

1.) Anyone else have any experience with a similar issue and can tell me anything about it?

2.) Will another dealership maybe have more luck getting the turbo part that Foundations hasn't been able to get?

3.) I have been driving this thing without issues other than the sound, the light and the error message, but I'm afraid to take it on a long drive up into the mountains. Can I keep driving it? Am I potentially damaging it more by continuing to drive it? Can I get the manufacturer to take the damn truck back since it has an issue that I can't seem to get fixed? It is under warranty. The interlock system was installed and Foundations tried to blame that for the issue, but it doesn't seem to me like they were correct about that.

Any advice is much appreciated! Thanks

Bobby

newdude · January 11

8 minutes ago, pentatonic145 said:

Hi Team - my dealership is struggling to figure out this problem - I'm wondering if anyone else out there has experienced or heard about something similar.

Truck was purchased brand-new in December of 2022 and has 18k miles on it today. It has an interlock system that was installed in February of 2023 (the device I have to blow in before I can start the engine to prove I'm not drunk). It's a SmartStart interlock system.

Around September for 2023 I had the oil changed at a Mike Maroone GMC in Boulder. After this I started noticing a noise when accelerating and decelerating. It's not the typical high-pitched noice of the turbo spinning up. To me it sounds more like a police siren. This video shows the noise:

It's like a "woooooooo WOOOOOOOOo" noise

After a while, I got the error message "Reduced Acceleration - Drive With Care" and a solid orange engine light. NOTE: I only get the "Reduced Acceleration" message periodically, when driving over 55 mph uphill. It goes away after turning the engine off and stays off for weeks until I accelerate up a steep hill again. The orange engine light goes away when the truck is very cold.

I brought my truck to Foundations Chevy/Cadillac/GMC and they looked at it. The tech said the Interlock installation caused a leak to the air intake and they replace these parts:

This fixed NOTHING!!! Still check engine light, still "Reduced Acceleration" message, still "woooo WOOOOOOoooo" sound.

Brought it back to them and they said "well, maybe it's the turbo - let's replace the turbo". Now I've been waiting for over a month for the turbo part to arrive - it hasn't arrived and the dealership tells me it's backordered with no ETA.

What I'm wondering is:

1.) Anyone else have any experience with a similar issue and can tell me anything about it?

2.) Will another dealership maybe have more luck getting the turbo part that Foundations hasn't been able to get?

3.) I have been driving this thing without issues other than the sound, the light and the error message, but I'm afraid to take it on a long drive up into the mountains. Can I keep driving it? Am I potentially damaging it more by continuing to drive it? Can I get the manufacturer to take the damn truck back since it has an issue that I can't seem to get fixed? It is under warranty. The interlock system was installed and Foundations tried to blame that for the issue, but it doesn't seem to me like they were correct about that.

Any advice is much appreciated! Thanks

Bobby

Interlock device won't cause a turbo noise and reduced power message, nor would it break a turbo. They are just using the "aftermarket device installed" route which for an interlock device and a mechanical engine concern they have no grounds on even trying that. If you had an electrical problem like no start or radio? Perhaps but they'd have to prove how it caused it.

It does sound like the turbo. You can hear it ramp up quickly and then it settles down to a steadier howl noise. The ramp up is the inital boost build and then the steady howl is it maintaining some sort of boost while accelerating.

Another dealer won't have luck getting a turbo any better than yours. If its backordered at your dealer, that means its backordered at GM and ALL dealers will have to place an order and get in line.

If the turbo is bad like a bearing is going, then sure still driving it could cause damage at some point.

pentatonic145 · January 11

Thank you! This is helpful information - I appreciate it.

Vincej138 · January 11

Did they tell you what code it was throwing to prompt the CEL?

Marcellus · October 13

I have 2024 and it's doing the same thing. I took to dealer they turned off light and told me it was an old code stored in system and they found nothing wrong. Was driving home last night same thing happened the code was p0299