|Subject:||Hard Brake Pedal On Cold Start Up With Possible Service Brake Assist Message|
|Models:||2016 Chevrolet Impala (VIN1) RPO’s LFR/LFX|
|2016 Buick Lacrosse RPO’s LFX,LUK|
|2016 Buick Regal RPO’s LEA/LUK|
|2016 Cadillac XTS RPO’s LFX/LF3 non-professional (limo/hearse)|
|Built between Feb. 19th- March 22nd, 2016|
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Upon diagnosis a technician may find codes C027B or P050F set in the EBCM.