FYI, the absolute cheapest way to scan your 94-95 Truck
*Notice: You need GMTD Scan Tech PRO to send commands such as TDCO Learn or injector balance tests (that isn't free)
What you need:
They are two of the wires in the RS232 (serial data) adapter you use to communicate with the PCM. Our PCM's are fairly forgiving so we don't need fancy adapters to connect up.
In the following ALDL pinout, you connect:
(use your imagination here, you can solder to paperclips and shove them in, use an ALDL connector you have laying around, or tap directly into the corresponding wires in the ALDL plug)
Now, Open GMTD Scan Tech Basic and make sure you settings are for COM# your adapter is recognized on your computer, and the baud rate = 8192.
Here's what the cable looks like when you get it. I didn't list any wire colors since they might vary per manufacturer. The auction should tell you what is what:
*Notice: You need GMTD Scan Tech PRO to send commands such as TDCO Learn or injector balance tests (that isn't free)
What you need:
- USB to RS232 Adapter
New PL2303 USB TTL RS232 Convert Serial Cable Connector | eBay - GMTD Scan Tech Basic
Engh Motors - GMTDScan Basic
They are two of the wires in the RS232 (serial data) adapter you use to communicate with the PCM. Our PCM's are fairly forgiving so we don't need fancy adapters to connect up.
In the following ALDL pinout, you connect:
- RX/TX to M (Serial Data)
- GND to A (Ground)
(use your imagination here, you can solder to paperclips and shove them in, use an ALDL connector you have laying around, or tap directly into the corresponding wires in the ALDL plug)
Now, Open GMTD Scan Tech Basic and make sure you settings are for COM# your adapter is recognized on your computer, and the baud rate = 8192.
Here's what the cable looks like when you get it. I didn't list any wire colors since they might vary per manufacturer. The auction should tell you what is what: