Police are treating the death of a 44-year-old Belconnen man, whose body was found in a Braddon unit earlier this month, as suspicious.

Investigators have identified that a grey Toyota Hilux utility was at the Lowanna Street location on December 20, the night the man died.

Police believe the owner of the utility may be able to assist with the investigation and would like to speak with them.

Anyone with information related to the Hilux or the death is urged to contact police via the Crime Stoppers ACT website or on 1800 333 000.