The unit, which is based at Stowmarket Fire Station, is aimed at supporting both emergency service crews and the community with things like hot food and drinks.
The Salvation Army says a previous vehicle had attended 210 events and emergencies but, after 13 years of service, it had become unreliable.
Funded by Suffolk Fire and Rescue Service and The Salvation Army, the new unit has been commissioned and dedicated during a service attended by representatives from both organisations.
Cllr Matthew Hicks, Suffolk County Council's Cabinet Member for the Environment and Public Protection; the Police and Crime Commissioner for Suffolk, Tim Passmore; and Temporary Deputy Chief Constable, Steve Jupp, for Suffolk Police were also there.
Mike Baker, The Salvation Army's Emergency Response Co-ordinator for Suffolk, said: "The Salvation Army has a long history of supporting the community in times of need.
"People think it is God's work with its sleeves rolled up.
"We are in partnership with the fire services and they support us and we support them.
"As a Church and a charity, The Salvation Army is dedicated to providing compassionate support, a listening ear and practical help to those in need in the community.
"We see our support of emergency personnel and the local community at emergencies as a vital part of our work."
Tim Passmore, Suffolk's Police and Crime Commissioner, said: "We are all indebted to the extraordinary work in society by The Salvation Army in so many ways.
"The Constabulary really appreciates the support of Salvation Army volunteers and officers given to the police during emergencies.
"They add a different and extremely worthwhile dimension to working with all emergency services in, what can often be, very difficult situations.
"The practical support of hot drinks and sandwiches, combined with the compassionate support makes a huge impact. In summary their contribution is invaluable."