Yesterday morning at 07:40 hours District 1 was dispatched to Frito Lay on Commerce Drive for the reported motor vehicle fire. Chief 28 arrived and had smoke showing from a 53 foot trailer parked in the lot with no exposures. Engine 562 , Utility 56, and Van 56 responded with a crew of 7. Upon their arrival they assisted the crew of Engine 44-1 and the FM8 units with gaining access to the trailer and extinguishment. The bulk of the fire was knocked and crews started extensive overhaul. All units were clear in approximately 1 hour and 30 minutes.