So a few times this week I've had to actually wait about 2-3 seconds after putting the truck into 'D' from either reverse or park before the trans actually engaged.

Any thoughts on this?

Truck is a '13 LTZ with HD tow package, 3.42 gearing.

I hit onstar up for an on demand diagnostic and they said all checked out.

 

Hello berettafan,

Are you planning on making your servicing dealership aware of this shift concern? We’d be happy to contact them on your behalf if so. We’re available via private message and only need your VIN, mileage, contact information, and preferred dealership. We do apologize for any inconvenience caused and hope to hear from you soon.

Kindly,

Jasmine
Chevrolet Customer Care