All lanes near Wednesbury reopened just before 21:00 BST on Thursday, National Highways says.
Police say a woman who was a passenger in a taxi on the M6 near Coventry, died in hospital.
The southbound carriageway was closed for several hours after the incident, National Highways said.
National Highways says three northbound lanes of the M6 are closed between junctions 25 and 26.
Gareth Evans describes the moment motorists went to help after a lorry overturned on the motorway.
The motorway fully reopens, after being closed near the Warwickshire and Leicestershire border.
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National Highways is reviewing its approach to upgrades at junction 38 through the Lune Gorge.
Major repairs to ageing bridges at Lune Gorge on the M6 were due to start next spring.
