OnStar Description and Operation (UE1 with IOB/IO6)
This OnStar system consists of the following components:
Telematics communication interface control module
OnStar three button assembly
Micr
DTC B0997
Diagnostic Instructions
Perform the Diagnostic System Check - Vehicle prior to using this
diagnostic procedure.
Review Strategy Based Diagnosis for an overview of the diagnostic
appro
Park Brake Calibration
The park brakes do not require calibration often. Park brake calibration may
be required after certain
service procedures are performed. Some of these procedures are as follows:
Park brake actuator replacement.
Rear brake pad replacement.
Rear brake rotor replacement.
Re
Brake Assist System Description and Operation
System Component Description
The brake assist system consists of the following:
Brake Pedal
Receives, multiplies and transfers brake system input force from driver.
Brake Pedal Pushrod
Transfers multiplied input force received from brake pedal to brake b