The On-Board Diagnostic (OBD) plug in a Chevy Express van is typically located under the dashboard on the driver's side. You can find it near the steering column, often above the pedals. It may be necessary to remove a cover panel to access the port. If you have difficulty locating it, consulting the vehicle's manual can provide specific guidance.
The board is under the cap in the Wiper Motor.
The plug to connect a scanner on a Chevy Express 3500 is typically located under the dashboard, near the driver's side. Look for the OBD-II (On-Board Diagnostics) port, which is usually situated above the brake pedal or near the steering column. Ensure the vehicle is turned on but not running when you connect the scanner to access diagnostic information.
Trouble code P1870 means: Transaxle Component Slipping (4T60-E)
Left Front Speed Signal Missing - possibly ABS related - will research more
The OBD II ECM (On Board Diagnostic II Engine Control Module) would be found under the hood, on top of the passenger side inner fender.
It is under drivers side dash board beside steering colum
On Board Diagnostic ( two ) I believe the first model year was ( 1996 )
The manual will have the exact location of the fuse for the PCM. If you are trying to do a reset then disconnect the neg battery cable for 10 minutes. www.trailvoy.com
It is under the hood, on the driver side
Behind the ash tray.
Look under the dash board near steering column
remove dash from 62 chevy