A security guard raised the alarm after the fire alarm sounded and the Motril fire service was soon on the scene in Calle Santo Domingo.
Five fire-department vehicles were deployed and were joined by a Protección Civil unit.
Four of the nine lorries in the workshop were damaged by the fire before it was declared extinguished at 02.30h.
The workshop has serious smoke and heat damage, as did the agricultural feed warehouse next door, which also contained chickens, rabbits and turkeys, none of which were harmed.
As yet, the cause of the fire is not known.
(News: Motril, Costa Tropical, Granada, Andalucia)