Hoping someone can offer some advice here....

I have a 2011 Suburban LTZ with 13k miles. Im the 2nd owner. I've had it about a month now. My question/problem- laggy down-shifting.

As I slow down, around 25 MPH or so, things are ok. As I begin to accelerate the motor feels very sluggish. The best way I can describe it is to say, imagine driving a stick-shift car and start slowing down, then need to accelerate. As you press the gas you get that sluggish feel before you down-shift. It doesnt do it as bad when I have the shifter in the "M" position. When I'm in "D", its much worse. Dealer says this isn't a problem. I have trouble believing its normal operation.

Can this be corrected? This is annoying enough to make me wanna dump the car. My 2007 'Burb LTZ didn't do this, nor did the 2008 Denali I was using as a loaner last week.

 

It would be my guess that its the way the 6 speed transmission works.. you could consider getting a "tune" that would firm up the shifts...