Ignition Switch on a 1979 GMC Vandura 3500.

[JHolt]

Need help please. The starter engages when the key is turned to the ON position and or the Accessory position. The ignition switch is dash mounted.

[MIKE S]

If you find you need an ignition switch, it is discontinued from GM. However there are at least 37 GM dealers in the U.S. that still show in inventory. Part# 12356033 Most G.M. dealers are willing to sell it to your local dealer. Also still available from aftermarket. Standard ignition# US84. Neither one will come with the key cylinder. Switch only.