The smash took place between J9, Walsall, and J8, Wednesbury, on the southbound carriageway.
West Midlands Ambulance Service [WMAS] was called to the scene shortly before 2pm today.
A spokesman for WMAS said: "We were called at 1.56pm to reports of an RTC [road traffic collision] involving a car and lorry on the M6, at junction 9.
"We sent one ambulance and a paramedic officer to the scene and treated one man for minor injuries. He was discharged at the scene."
A photograph of the scene showed a white car embedded into the trailer of a lorry.
Debris was also left strewn on the road.
A spokesman for West Midlands Fire Service said: "We received a call at 2:08pm on February 23 alerting us to a road traffic collision involving an LGV and car on the M6 south motorway, between junctions 9 and 8.
"Three fire engines from Walsall, West Bromwich and Perry Barr and 15 firefighters attended the scene where the occupants of both vehicles had extricated themselves from the vehicle prior to the crews’ arrival.
"Specialist equipment was used to contain a fuel spillage of around 100 litres from the LGV and the environment agency was requested to attend.
"Firefighters remained at the scene until around 3.15pm before leaving the incident in the hands of the Highways Agency."