Rough idle issue? (1 Viewer)

[2ndGlock]

I recently picked up a stock '18 GX460 w/ 35k mileage and clean carfax. I feel that it rides as it should and I don't really notice from looking at it or during the drive the infamous "KDSS lean".
It maybe happens twice a week? but I notice that when I have my foot on the brake whether it'd be at a stop sign or at a red light, the car would sometimes shake/vibrate violently and when I let my foot off and re-apply the brakes, it seems to go away. I was just wondering if this is a common issue or if anyone else has dealt with this and if I need to take it into the shop for it?
At first, I didn't think much of it since it goes away when I take my foot off and re-apply the brakes, but it got me thinking if it's an indicator of an issue that should be resolved in a timely manner before it "spreads" to either more parts or a bigger issue, so let me know what I should do. Thank you, all.

 

[Bang Bang]

I would have it checked out. But the trick will be can you replicate the issue for the shop you bring it to.

 

[jiggletits]

Spark plugs? Mine did something similar. Plugs fixed it but it’s a 470 with a more archaic motor.

 

[r2m]

Maybe motor mount, but I haven't heard of any issues with motor mounts.
Also, the "infamous" KDSS lean is most often associated after an after market suspension lift.
Personally I've never had an issue with KDSS or leaning, except when I've been very off camber on a trail!

 

[Rednexus]

An easy "fix" would be to simply disconnect the battery for 10 minutes and then reconnect. The ECU on these engines is always in learning mode, sometimes resetting it and having it start to learn from scratch will make a minor issue like a rough idle, potentially caused by a few tanks of cheap gas or something else, disappear.

I'd also run a bottle of fuel injector cleaner through it (like Techron). At 35K you should not need spark plugs.