Oh, I'll absolutely be complaining over this. While it may sound important in the grand scheme of things, I pay my hard earned money for this and I expect a certain level of service from not only GM, but the dealer I purchase from. I've complained over "lesser" things and have had them repaired. It's a deficiency and it'll be repaired, otherwise I'll not use that dealer again and would also consider GM in question as well. It won't get that far, and it'll be repaired when asked for. I've never not once got my way with a reproducible, warranty issue/defect, except once, and involved corporate to resolve it.I cannot imagine a dealer taking this concern seriously.......and there really is nothing to repair. If it was off by 5mph or more then the only course of action is panel replacement.
The analogue is IMO, just about in agreement with the digital and in all seriousness, any analogue instrument falls into the 'close enough' range......same as any of the other analogue instruments.
If you split hairs that tightly you'll go crazy if you compare your readings (digital and analogue) to a GPS......be prepared to see the panel one to three percent higher than GPS actual.
Going further, as the tires wear, the percentage will increase since they are getting smaller in diameter.
Worry not, enjoy the car.
Dealer ordered a new cluster under warranty, it'll be installed on Monday. I think you're misunderstanding that the gauges do not match what the corresponding digital readout indicates. I am not going to continuously subtract 1.7529593292 MPH every time I look at the analog gauge, which I do far more than the digital screen. I'm well aware of the inconsistencies of a vehicle speed in regards to tire size, tread, weight etc read as opposed to a GPS measurement. That's not my concern here.