Originally Posted by canadiancow

No.

https://www.aircanada.com/us/en/aco/...onditions.html

"Although you will be seated in either Premium Economy or Business Class when your upgrade is confirmed, your booking will remain subject to the fare rules and restrictions of the booking class and fare option you originally purchased. These rules include, but are not limited to, mileage accumulation, change and cancellation fees, access to airport lounges and baggage allowance."