Heavy truck sales really collapsed during the great recession, falling to a low of 180 thousand SAAR in May 2009. Then heavy truck sales increased to a new record high of 570 thousand SAAR in April 2019.
Note: "Heavy trucks - trucks more than 14,000 pounds gross vehicle weight."
Heavy truck sales declined sharply at the beginning of the pandemic, falling to a low of 288 thousand SAAR in May 2020.
Heavy truck sales were at 477 thousand SAAR in September, down from 501 thousand in August, and down 4.7% from 501 thousand SAAR in September 2023.
Usually, heavy truck sales decline sharply prior to a recession. Heavy truck sales are solid.