Retired Army Lt. Col. Guy F. LoVecchio, 67, who served with the Signal Corps for many years and then was a civilian with the Defense Communications Agency, died Wednesday at Fairfax Hospital after a heart attack. He lived in Annandale.

Col. LoVecchio was stationed at Fort Meade, Md., when he retired from the Signal Corps in 1964. He then joined the DCA and was executive officer of its National Communications System when he retired a second time in 1976.

He was born in St. Joseph, Mo., and attended St. Benedict's College in Atchison, Kan. Later, he also studied at the University of Maryland.

Col. LoVecchio worked for the Civilian Conservation Corps in Wisconsin before coming to Washington as a civilian employe in the Army adjutant general's office in 1940. He was sent to Panama and while there was commissioned in the Army in 1943.

After his return to Washington, he transferred to the Signal Corps. He saw duty in Korea during the conflict there, returned to the Pentagon and in the late 1950s was assigned to military communications in southern Europe with headquarters in Verona, Italy. His last assignment was at Fort Meade.

Survivors include his wife, Gianna A., and two sons, Steven and Marco, of Annandale; two sisters, Mary Bevacco and Helen LoVecchio, both of Villa Park, Ill., and three brothers, Angelo and Henry, both of Arlington, and Charles, of Arcadia, Calif.