Cadillac CT5

Vehicle Type: CT5

This vehicle type supports the 2020-2026 Cadillac CT5.

Support Overview

Function	Support Status
Hardware	OVMS v3
Vehicle Cable	(Custom)
GSM Antenna	Works with any OVMS v3 supported antenna
GPS Antenna	Works with any OVMS v3 supported antenna
SOC Display	Yes
Range Display	No
GPS Location	Yes (from GPS module/antenna)
Speed Display	No
Temperature Display	No
BMS v+t Display	No
TPMS Display	No
Charge Status Display	Yes (Fuel level)
Charge Interruption Alerts	No
Charge Control	No
Cabin Pre-heat/cool Control	No
Lock/Unlock Vehicle	No
Valet Mode Control	No
Others	12V battery

The CT5 uses the GM Global B platform which requires authentication so polling isn’t currently possible. While it’s possible support for OBD-II/SAE J1979 service modes can be added, features such as vehicle lock/unlock are unlikely. CAN bus #6 is available on the under dash OBD-II connector but it is designed to be used for diagnostics and emissions testing and no frames are relayed to it. Instead we listen to CAN bus #5 which is available on connectors going to the audio amplifier in the trunk.

To support this vehicle it is necessary to make a custom cable. Battery power and ground can be found on audio amplifier connector X1:

X1	DB9-F	Signal
8	3	Chassis / Power GND
4	9	+12V Vehicle Power

CAN bus #5 is available on X3:

X3	DB9-F	Signal
9	2	can1 L (CAN bus #5 L)
8	7	can1 H (CAN bus #5 H)

Standard Metrics

Metric name	Notes
ms_v_b_soc	Fuel level (%)
ms_v_bat_12v_voltage	Resolution of 0.1 V
ms_v_e_on
ms_v_vin	17 characters