This category on the website [ Servos Valves and Wiring ] we are giving you all of the information related to the individual parts in the Buick Turbo Regal, along with the associated wiring, connector plugs, etc.
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VEHICLE APPLICATION:
Buick Regal, T-Type, Turbo T, Limited, Grand National, GNX
VALVE NAME:
Idle Air Control Valve (IAC)
PURPOSE OF VALVE:
controls the air flow at idle
TURNS ON-OFF / FUNCTIONS / USED WHEN:
in constant use when the engine is running
LOCATION IN VEHICLE:
engine compartment, front of motor, underneath up pipe, front side of throttle body
ORIGINAL GM PART NUMBER:
25527077
VALVE BASE COLOR:
black
replacements are (silver colored) metal
CONNECTOR PLUG COLOR (VALVE SIDE):
black
WIRES ATTACHED (VALVE SIDE):
n/a
CONNECTOR PLUG COLOR (HARNESS SIDE):
black
NUMBER OF WIRES ATTACHED (HARNESS SIDE):
4
COLOR & PURPOSE OF (HARNESS SIDE) WIRES:
blue-white “A”, goes to ECM (“C5” coil A high)
blue-black “B”, goes to ECM (“C6” coil A low)
light green-white “C”, goes to ECM (“C4” coil B high)
light green-black “D”, goes to ECM (“C3” coil B low)
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OTHER NOTES:
this is actually an electric motor.
some people use a custom angled adapter plate to mount the IAC valve in (this offsets the motor 45 degrees for better up pipe clearance).
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PHOTOS OF VALVE AND CONNECTED WIRES:
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Here’s a list of all of the Solenoids Modules and Servos Valves in the Buick Regal:
(click the links to go to the one you need info about)
* Canister Purge Solenoid (Fuel Vapor Canister Purge)
* Chime Module (Chime Alarm)
* Cruise Control Module
* Cruise Control Servo
* EGR Valve
* ESC Module
* Exhaust Gas Recirculation Vacuum Regulator Valve Solenoid (EGR EVRV)
* Heater Flow Water Control Valve
* HVAC Control Vacuum Valve (mode control valve)
* Idle Air Control Valve (IAC)
* PCV Valve (Positive Crankcase Ventilation)
* Proportioning Valve (Prop Valve)
* Starter Solenoid
* Theft Deterrent Controller Module (anti-theft system)
* Torque Converter Clutch Solenoid (TCC)
* Trunk Release Solenoid
* Vacuum Check Valves
* Wastegate Control Solenoid
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