His mother and father, Mathieu Perron and his pregnant partner, Vanessa Viger, were pronounced dead a few hours after the accident, which happened on Saturday evening.
Yves Martin, 35, has been charged with dangerous driving, impaired driving and criminal negligence causing death after his pick-up truck collided with their vehicle.
A spokesman with the Saguenay police said many witnesses reported the suspect was driving at a high speed.
When he entered the Saguenay court house on Monday morning, Martin said he was sorry for what happened.
Martin is set to appear in court again on Friday.