WARNING: This page is about a different car, the 2003 Buick Regal and 2003 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Identifying Electrical Symbols - (1 Of 8)
Courtesy of GENERAL MOTORS CORP.
Fig 2: Identifying Electrical Symbols - (2 Of 8)
Courtesy of GENERAL MOTORS CORP.
Fig 3: Identifying Electrical Symbols - (3 Of 8)
Courtesy of GENERAL MOTORS CORP.
Fig 4: Identifying Electrical Symbols - Chart (4 Of 8)