It was first teased on a blog post back on January 2016. According to an official livestream by SCS Software in December 20, 2018, it was mostly finished at the time, but approving the model took a lot of time because there are several owners and right-holders involved. It was added to the game on September 26, 2019 alongside the 1.35 update.
25 January 2016: Truck Licensing Situation Update blog post reveals the Renault T.
20 December 2018: SCS announced on their livestream that the truck is in very advanced licensing stages and that it will come in 2019.
11 February 2019: SCS Software posted, on their Instagram story, a picture of an SCS crew attending to record sounds for the Renault T.
17 September 2019: SCS posted a mystery video on their social medias, that the background sound of the video, hear a truck engine sound, but precisely Euro 6 DTI 11, engine that the Renault T use.
20 September 2019: SCS Community Manager Carthoo, posted on the SCS forum, a image of a truck inside a dark garage, whose silhouette closely resembles the Renault T.
21 September 2019: SCS posted on their social medias, an image talking about the teaser posted by Carthoo on forum.
23 September 2019: Renault Trucks' official twitter account gave a retweet on the SCS tweet of the mysterious video saying: "Is something going on at @SCSsoftware? Looks pretty smoky down there" and SCS answered this same tweet saying: "We are about to set fire to the internet with some incredible news @RenaultTrucksCo #ets2Tparty on Thursday".
24 September 2019: Renault Trucks' and SCS' social media accounts, posted at the same time, a video of a truck inside a dark garage, whose silhouette closely resembles the Renault T.
25 September 2019: Renault Trucks' and SCS' social media accounts, posted at the same time during the day, videos showing parts of the Renault T.
26 September 2019: Release of the truck along with a trailer video.