Layne02
Full Access Member
- Joined
- Dec 5, 2015
- Posts
- 122
- Reaction score
- 11
- Location
- Ga
- First Name
- Jeff
- Truck Year
- 1987
- Truck Model
- R1500
- Engine Size
- 305
Hi, I have what is probably a rookie question and cant get phone to post a picture but here goes. Have an 87 gmc sierra with 305 , what I want to know is what is the part that looks like a large vacuum advance and hooks to throttle body armature where the linkage hooks up? It actually pushes in and out like it pumps air. Anybody know?
