2017 Yukon Denali Shudder Problem

Hey there,

I picked up a 2017 Yukon Denali with 60k miles on it from Carmax two days ago. I didn’t notice it during the test drive, but I’m experiencing a shudder that feels like driving over rumble strips.

I went back to Carmax yesterday morning, and they knew exactly what I was talking about. They said they would send it to GMC to perform a transmission fluid flush. If that resolves the issue, I should be good. If not, they would replace the torque converter.

My question is: if the flush is successful, should I expect the car to run fine for a while, or is this issue likely to reoccur after a few thousand miles?

We love the car otherwise, but we’re concerned.

Is there anything else with this model I should be thinking about?

Thank you!

I have the exact same vehicle. I bought it with 41k and had the shudder at 43k. The fluid flush works magic. I now have 162k on it and it's been great. Make sure to keep the fluid changed every 40k. I usually change the filter every 80k.

The fact that they offered to replace the TC is huge. Just keep good records. If you can get a flush out of it and a new TC, you'll be good for MANY miles.

My only concern from the whole deal would be HOW long has it been doing this with 60k on the clock. The fluid basically causes the TC to experience sticky spots due to the moisture that's trapped in the fluid - hence what you feel.

B-train said:

I have the exact same vehicle. I bought it with 41k and had the shudder at 43k. The fluid flush works magic. I now have 162k on it and it's been great. Make sure to keep the fluid changed every 40k. I usually change the filter every 80k.

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Thank you! That's encouraging to hear.

Welcome to the Forum from NH.

Lots of knowledgeable folks here who freely share their knowledge, experiences, and perspectives. Knowledge is power.

I hope that you will become a participating member in the Forum's discussions.

Pics of the truck, please.

You are already receiving sage advice from the knowledgeable folks on this Forum.