Lewis James Barton, 29, pleads guilty to killing 59-year-old Angaston woman in alcohol-fuelled crash

A 29-year-old Mount Pleasant man has pleaded guilty to killing a woman in a alcohol-fuelled crash north of the Adelaide Hills.

A drunk driver has pleaded guilty to causing a three-car crash that killed a female passenger north of the Adelaide Hills.

Lewis James Barton, 29, from Mount Pleasant, appeared in the Adelaide Magistrates Court on Thursday to answer the charge.

He pleaded guilty to aggravated causing death by dangerous driving and two counts of aggravated causing harm by dangerous driving.

About 6pm on October 17, Barton was driving a Nissan four-wheel-drive when he caused an alcohol-fuelled crash with a Holden SUV and a Holden ute on Eden Valley Road at Mount Pleasant.

A 59-year-old Angaston woman died in hospital 10 days after a three-car crash at Mount Pleasant. Lewis James Barton has pleaded guilty to causing her death by dangerous driving. Picture: 7NEWS

The crash scene where an Angaston grandmother was killed. Lewis James Barton has pleaded guilty to causing the crash. Picture: 7NEWS

The passenger of the SUV, a 59-year-old Angaston woman, suffered life-threatening injuries and was flown to the Royal Adelaide Hospital. She died in hospital 10 days later.

The driver and passenger of the ute, a 72-year-old man and 58-year-old woman from Nuriootpa, were left with non-life threatening injuries.

It is alleged Barton ran from the vehicle before police arrived and was arrested a short time later in a nearby paddock.

He was taken to the Lyell McEwin Hospital for treatment of minor injuries.

Barton is yet to plead to a charge of leaving the scene of an accident after causing serious harm.

Defence counsel told the court they were negotiating with prosecution.

Barton will appear in court again next month.