What Does a Turbo Wastegate Actuator Do?
The wastegate actuator is the mechanical component responsible for moving the turbocharger’s wastegate according to the pressure-control strategy of the turbo system.
When boost-control conditions call for the wastegate to open, the actuator moves the wastegate mechanism to divert exhaust flow away from the turbine. This helps prevent uncontrolled boost pressure and keeps turbocharger operation within the intended range.
A worn, damaged, or improperly functioning actuator can contribute to inconsistent boost control and turbocharger performance issues.
55589100 vs. 55587751: What’s the Difference?
These two GM turbocharger components should not be confused.
55589100 / 667-714 refers to the mechanical turbo wastegate actuator covered by this product.
55587751 / 55574902 / 667-080 refers to a turbocharger wastegate actuator boost-control solenoid valve.
The actuator physically operates the turbocharger’s wastegate mechanism, while the solenoid is part of the system that controls the pressure or vacuum signal used by the actuator.
If you’re replacing a solenoid, this is not the correct product. If you’re replacing the mechanical wastegate actuator, verify that 55589100, 667-714, or 667714 matches your original component.
Replacement OE Numbers
This actuator is listed under the following replacement numbers:
- 55589100
- 667-714
- 667714
Part numbers are provided for identification and compatibility purposes. Verify the original part number before purchase.
Installation Considerations
Before installation, compare the replacement actuator with the original component. Confirm:
- OE part number
- Vehicle year
- Vehicle model
- Engine configuration
- Actuator mounting points
- Wastegate linkage arrangement
- Turbocharger configuration
After installation, verify proper wastegate movement and boost-control operation.
Frequently Asked Questions
What vehicles does the 55589100 wastegate actuator fit?
The supplied application list covers the Chevrolet Cruze 2011–2015, Cruze Limited 2016, Sonic 2012–2020, Trax 2013–2021, and Buick Encore 2013–2021 with the listed 1.4L turbocharged configuration.
What are the replacement part numbers?
The listed OE replacement numbers are 55589100, 667-714, and 667714.
Is this a wastegate actuator or boost solenoid?
This product is a mechanical turbocharger wastegate actuator. It is not the 55587751/55574902 boost-control solenoid valve.
Does the actuator control turbo boost?
The actuator operates the turbocharger’s wastegate mechanism as part of the vehicle’s overall boost-control system. Actual boost control depends on the complete turbocharger and engine-management system.
Will this eliminate turbo lag?
A replacement actuator can restore proper wastegate operation when the original actuator is faulty, but it should not be advertised as a guaranteed solution for turbo lag.
Should I verify the part number before ordering?
Yes. Compare your original actuator and OE number with 55589100, 667-714, or 667714, and verify the complete vehicle and engine fitment before purchase.
Restore Proper Wastegate Operation
If your GM 1.4L turbocharged vehicle requires a replacement mechanical wastegate actuator, this 55589100 / 667-714 turbo wastegate actuator is designed for the Chevrolet and Buick applications listed above.
Shop turbocharger components and replacement boost-control hardware at ProStreetOnline and verify your OE part number before ordering.
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