Ricko1966
Full Access Member
- Joined
- Apr 11, 2017
- Posts
- 9,940
- Reaction score
- 19,069
- Location
- kansas
- First Name
- Rick
- Truck Year
- 1975
- Truck Model
- c20
- Engine Size
- 350
An OBD1 or OBD2 scanner will not work on this Truck GM was still using their own ALDL Protocol and thier own tech scanners. There are some companies that can sell you a cable or Bluetooth and you can use ALDL Droid. Old snapon red brick will work,old OTC genisys will work there are a few others but mostly used on ebay and you need to verify you are getting the cartridge for GM.