Product Description

We have a module that will send the AC request signal to the E38 ECU and will allow you to run your A/C from the factory ECU or use the AC idle-fan functions.

Simply  wire it into your harness and when you apply 12 volts (Positive control) or Ground (Negative control) to the trigger wire it will send the Ac request signal to the GM ECU. 

** This module simulates the messages that the GM BCM would be sending in a stock vehicle.  This module is designed to replace a GM BCM. You can NOT have a GM BCM on the canbus and use this module at the same time. **

We have tested this module with the GEN4 truck and camaro calibration using a E38 ECU. 

If your AC unit outputs 12 volts when turned on you will need a postitive control box.

If your AC unit grounds the output you will need a negative control box.

*** This will not function if you are running a GMPP GM Performance ECU or calibration. The GMPP calibrations do not have provisions for AC control ***

*** This will not work corectly if you are still running a GM BCM in the system. The BCM will be sending the Ac request = OFF message and will make the AC request jump in and out when our module sends a AC request = ON message. ***

INSTRUCTIONS