Description: S-series. Without 4.3l. 1985-94. With rear ac. 2.5L. 2.3L. 3.0L. 2.0L. 1st design. Allows HVAC controls to function during low engine vacuum conditions This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors

Description: This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors Original equipment parts are designed to work with your GM vehicle safety systems -- aftermarket replacement parts may not meet the same OE safety regulations, depending on the part type

Description: All models.