Dtc 17

[Artworks]

Last couple days I have been getting a DTC code 17, High resolution Circuit Fault. When I go to start the truck ( warm ) it set this code couple times. What should I look for ? battery and ground conections ? or the PCM ?

[gmctd]

Start with battery, grounds and connections, also under the coolant resevoir, where the PCM harness crosses the ac pipe - known to fray the wiring.

If that doesn't clear it up, try removing the Optic Sensor Filter - 6-wire rectangular piece inserted between the engine harness connector and the OS connector.