GILROY -- A traffic stop ended in a major drug bust last week, after a police dog sniffed out about 11 pounds of well-concealed suspected cocaine with a street value of more than $120,000, police said.

San Jose resident Gamliel Duran Avelar, 31, was pulled over shortly before 9 p.m. Aug. 21 on Highway 101 north of Gilroy by a California Highway Patrol officer because of a "mechanical infraction" that would have resulted in a fix-it ticket, said Gilroy police Sgt. Pedro Espinoza.

"The CHP officer smelled marijuana in the vehicle, and had probable cause to have the occupant step out and search the car," Espinoza said.

A Gilroy K-9 unit was called to the scene, and 3-year-old German shepherd "Pharoah," recently trained to detect narcotics, picked up a scent that led officers to dismantle a portion of the car and find the hidden stash.

"That's a significant amount of cocaine," said Espinoza. "After adding cutting agents, it could come up to seven kilos."

Espinoza said it is not known if Avelar was employed by a drug cartel or how he came to be in possession of the drugs.

"That is still to be determined," Espinoza said. "He's not saying anything."

Anyone with information about the case is asked to call Gilroy police at 408-846-0350.

Contact Eric Kurhi at 408-920-5852. Follow him at Twitter.com/erickurhi.