The object was found on Siegler Canyon Road, according to California Highway Patrol Officer Steve Tanguay.
At around 3:30 p.m. the CHP was en route to investigate, Tanguay said.
By that time, the road already had been closed down, he added.
Drivers along Siegler Canyon Road had to go back to Butts Canyon Road, while those traveling along Highway 29 reported that the CHP was turning back westbound traffic on the Glasgow Grade near Lower Lake.
CHP Sgt. Scott Moorhouse said a bomb squad came from Napa County to investigate the device.
They concluded that the object was not a pipe bomb but a GPS device, Moorhouse said.
He said the affected roadways were reopened later in the evening.
This past January, a facsimile device found along Highway 20 east of Highway 16 by Caltrans workers required a bomb squad be called out, as Lake County News has reported. That item also was not a bomb.
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