General Motors, Switch, 12603784 Genuine Oem:Yes, Category 2:Engine, Superseded Part Number:12457709, Part Ref# On Diagram:ONLY PART REFERENCE #18 ON THE DIAGRAM I Brand:GM, Fitment Type:Direct Replacement, Other Part Number:12457709, 12555917, 12579982, 10137676, Quantity Needed:1 Manufacturer Part Number:12603784, Category 3:Engine Parts, Item Name:Connector, Category 1:Engine