2017 Yukon hesitating/shuddering

[Td_symmons]

Hi all! New to the forum and first post:

I have a 2017 GMC Yukon 5.3 SLE 4WD (157k miles) with a hesitation issue. While accelerating, the vehicle experiences a slight shudder and acts like it has a very hard time accelerating until it downshifts and the shudder goes away. No trouble codes. Shudder/shake does not persist after letting off the gas pedal. No matter the speed (but it’s worse at highway speeds). The following maintenance was just completed about 1k miles ago to fix other issues- after which this new problem arose.

-New full set of OEM (nominal flow) injectors
-Intake port cleaning
-Tire rotate & balance
-Added some Lubegard platinum to the transmission fluid

Important info:
-Transmission rebuild at 130k miles
-Spark plugs replaced at 130k miles

This really acts like a low fuel pressure problem from experience diagnosing other vehicles, but I am not really sure.

I have attached an image of my most recent graph recording of some PIDs while this issue occurred. Note the circled area since the screenshot was taken while the problem was recreated.

Anybody else have this issue or know what to check for? I included the MAP sensor reading on the graph since I saw one person with this issue reported a faulty MAP sensor being the issue.

 

[FrankG]

Hi all! New to the forum and first post:

I have a 2017 GMC Yukon 5.3 SLE 4WD (157k miles) with a hesitation issue. While accelerating, the vehicle experiences a slight shudder and acts like it has a very hard time accelerating until it downshifts and the shudder goes away. No trouble codes. Shudder/shake does not persist after letting off the gas pedal. No matter the speed (but it’s worse at highway speeds). The following maintenance was just completed about 1k miles ago to fix other issues- after which this new problem arose.

-New full set of OEM (nominal flow) injectors
-Intake port cleaning
-Tire rotate & balance
-Added some Lubegard platinum to the transmission fluid

Important info:
-Transmission rebuild at 130k miles
-Spark plugs replaced at 130k miles

This really acts like a low fuel pressure problem from experience diagnosing other vehicles, but I am not really sure.

I have attached an image of my most recent graph recording of some PIDs while this issue occurred. Note the circled area since the screenshot was taken while the problem was recreated.

Anybody else have this issue or know what to check for? I included the MAP sensor reading on the graph since I saw one person with this issue reported a faulty MAP sensor being the issue.

Mine is doing something similar, did you ever figure it out?

 

[e3gordon]

Similar issue atm - bumping!

 

[Fless]

Mine is doing something similar, did you ever figure it out?

The OP hasn't been on here since Feb.

 

[rustyj671]

Mine is doing something similar, did you ever figure it out?

Over the weekend, I did the following per the instructions in the video. I had to have a helper to control the throttle though.

https://www.tiktok.com/video/7109562200020225323

It cleaned up all the hesitation on mine. It used to act like it was falling on its face when NORMALLY accelerating from a stop. Now it's smooth.

 

[Doubeleive]

yep at 100k this needs to be done, I would do it before then it's just how these direct injection motors operate.
after this is done all of that hesitation should be gone