2.5L & 2.8L 4-Cylinder

NOTE: The following vacuum diagrams are courtesy of General Motors Corp. Information is not available for models not listed. Letters in parenthesis are the emission calibration code, located on underhood label.

Fig 1: 2.5L 4-Cyl. "S" Series Light Duty Calif./Fed. All Trans. (LCT, LCU & LDA)

Fig 2: 2.5L 4-Cyl. "S" Series Light Duty Calif./Fed. M/T (LDB & LDC)

Fig 3: 2.8L TBI S Series Calif./Fed. All Trans. (LDB & LDC)