It’s been known for awhile now that the days of the Cadillac CT6 flagship sedan are numbered. Now, the end of Cadillac’s short-lived big sedan is firm with production slated to end next month at GM’s Detroit-Hamtramck Assembly plant.

According to AutoBlog, GM has filed employment paperwork with the state of Michigan confirming plans to layoff workers at the plant starting February 28th. The layoffs stem from plans to end CT6 production in January, while production of the Chevrolet Impala is slated to cease on February 28th.

Once both sedans are dead, GM will maintain a skeleton crew at the facility while it undergoes a $3 billion overhaul to ultimately produce battery-electric vehicles. GM has stated the $3 billion investment will double the number of employees in the plant to 2,225 to produce a new line of electric SUVs and trucks.

Known as the BT1 program, this new line of electric vehicles is expected to start with a van model in 2021. Electric SUVs and trucks–including some with the revived Hummer nameplate–will arrive between 2021 and 2023.

The Detroit-Hamtramck plant was originally on GM’s list of plants to close. During recent negotiations between GM and the United Auto Workers union the company changed course and instead committed to keeping and investing into the facility.