A man had to be extricated by firefighters with serious injuries after he crashed into the back of a semi-truck near Route 173 and Marshall Street in unincorporated Chemung Thursday morning. | Photo: Alex Vucha / Lake and McHenry County Scanner

A 24-year-old man was flown to the hospital with serious but non-life-threatening injuries after he rear-ended a semi-truck on Route 173 west of Harvard Thursday morning.

The Harvard Fire Protection District and McHenry County Sheriff’s Office responded around 9:50 a.m. Thursday to Route 173 and Marshall Street in unincorporated Chemung for a two-vehicle crash with entrapment.

A 24-year-old man was driving his 2003 GMC Envoy eastbound on Route 173 approaching Pagles Road, McHenry County Sheriff’s Office Public Information Officer Kevin Byrnes said.

A man had to be extricated by firefighters and was flown to the hospital with serious injuries after he crashed into the back of a semi-truck near Route 173 and Marshall Street in unincorporated Chemung Thursday morning. | Photo: Alex Vucha / Lake and McHenry County Scanner

A 62-year-old man was driving a 2012 Volvo semi-truck eastbound in front of the GMC and slowed down due to traffic in the area.

The GMC failed to reduce his speed and crashed into the back of the semi-truck, Byrnes said.

The 24-year-old man told deputies his brakes did not work.

He was trapped in his vehicle and had to be extricated by firefighters.

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A man was flown to the hospital with serious injuries after he crashed into a semi-truck near Route 173 and Marshall Street in unincorporated Chemung Thursday morning. | Photo: Alex Vucha / Lake and McHenry County Scanner

A Mercyhealth REACT helicopter was called and airlifted the man to Javon Bea Hospital in Rockford with non-life-threatening injuries, Byrnes.

According to the Harvard fire chief, the man sustained serious injuries.

The 62-year-old man driving the semi-truck was not injured.

The crash remains under investigation by the McHenry County Sheriff’s Office.