Roy Dunkin, 51, faces 15 years and four months in prison if convicted in the death of 24-year-old Lucas Riley, a Point Loma Nazarene graduate who was going to be married next month.
The Saturday night crash was one of four DUI-related fatalities in San Diego County last weekend, said Deputy District Attorney Cally Bright.
Authorities said Dunkin was driving a pickup truck on northbound state Route 67, south of Cloudy Moon Drive, about 7 p.m. when he veered into the southbound lanes and struck the rear panel of a late model Buick and a Mini Cooper driven by Riley.
The Mini Cooper burst into flames and Riley was pronounced dead at the scene.
Dunkin -- held on $2 million bail -- will be back in court Sept. 2 for a readiness conference and Sept. 7 for a preliminary hearing.