Note that the following lists out all the available inputs on the 1G and 2G DSM ECUs. Most of these have special cases associated with them to be useful as a general purpose analog input. The most freely available inputs are the EGRTemp input on a 1G ECU and the RearO2 and MDP inputs on the 2G ECU. The rest have special cases to consider with them. Some may even require a buffer circuit to be driven properly, depending on which sensors is connected to which input.

Reference: ECU Wiring Docs

• EGR Temp Input (ECU Pin 15)
• IAT Input (ECU Pin 8) - Requires GM MAFT w/Ignore IAT/Baro selected.
• Baro Input (ECU Pin 16) - Requires GM MAFT w/Ignore IAT/Baro selected.
• Front O2 (ECU Pin 4) - Only usable when “Open Loop” option is selected.

• Rear O2 (ECU Pin 75)
• MDP (ECU Pin 73)
• Baro (ECU Pin 85) - Requires GM MAFT w/Ignore IAT/Baro selected. Has internal pull down resistor making it unsuitable for certain sensors (see work around).
• IAT (ECU Pin 72) - Requires GM MAFT w/Ignore IAT/Baro selected.