Mr Campbell, 30, was an experienced mechanic, who lived in Glenrothes, Fife.
Mr Campbell, a workshop foreman for Scania (Great Britain) Ltd, died on 15 March 2019 while repairing a Scania tanker lorry at the premises of Oilfast Ltd, Forfar.
The inquiry was a mandatory inquiry since the death of Mr Campbell occurred while in the course of his employment.
DETERMINATION INTO THE DEATH OF GARY CAMPBELL
The purpose of an inquiry is to establish the circumstances of the death and to consider what steps, if any, may be taken to prevent other deaths in similar circumstances.
Unlike a criminal trial, a Fatal Accident Inquiries (FAI) seeks to establish the facts surrounding the death and is not a hearing which apportions blame.
The Procurator Fiscal led comprehensive information from a range of sources on the facts and circumstances of Mr Campbell's death.
Following the publication of the determination, Procurator Fiscal Andy Shanks, who leads on fatalities investigations for COPFS said:
“We note and welcome the Sheriff’s determination.
“The Procurator Fiscal ensured that the full facts and circumstances of Mr Campbell’s death were led in evidence at the mandatory Fatal Accident Inquiry.”