The police on Friday claimed to have recovered the light goods vehicle, in which a 19-year-old girl was gangraped on Wednesday.
The four accused were made to undergo medical examination, which confirmed their involvement in the crime.
"We recovered the vehicle from Sector 20B late on Thursday night," said a police official.
"Forensic experts were called who examined semen spots inside the load carrier on Friday and sent its sample for forensic science lab at Maduban in Haryana," he added.
Sanjeev Kumar, in-charge of sector 16 police chowki, said all four accused were produced in court on Friday that remanded them to judicial custody.
The four men had allegedly abducted the girl when she was on her way to attend a wedding. They then bundled her into a goods carrier where they allegedly took turns to rape her.