If your 2014 Chevy Silverado’s power steering suddenly stops working and displays a “Power Steering Drive With Care” warning on the DIC, accompanied by illuminated Brake, Traction Control, and ABS lights, you’re not alone. This issue often triggers diagnostic trouble codes (DTCs) such as U0121-00 (loss of communication with the Electronic Brake Control Module), P2544 (Transmission Torque Request Signal Message Counter Incorrect), and U0073 (CAN Bus Communication). While a dealership visit might seem inevitable, a DIY solution is often possible. This article outlines a common cause and fix for 2014 Chevy Silverado Power Steering problems.
Identifying the Culprit: Power Steering Control Module Corrosion
The root cause often lies within the Power Steering Control Module (PSCM). Specifically, corrosion within the main power plug connecting the PSCM to the battery can disrupt communication and functionality. This corrosion interferes with the electrical signals, leading to the aforementioned warning lights and error codes.
Cleaning the PSCM Connector: A Step-by-Step Guide
Before rushing to replace expensive parts, try cleaning the corroded connector. Here’s how:
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Locate the PSCM: The PSCM is typically located near the steering column or under the hood. Trace the wiring from the power steering pump to find the module and its main power connector.
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Disconnect the Connector: Carefully disconnect the main power plug from the PSCM.
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Clean the Male Connector: Using electronic cleaner and a plastic bristle brush (to avoid shorting), thoroughly clean the inside of the male connector (the side with the pins).
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Clean the Female Connector: Similarly, clean the female connector (the side with the receptacles) using electronic cleaner and a brass brush to remove corrosion from the contact points.
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Apply Dielectric Grease: Once clean, apply dielectric grease to both connector halves to prevent future corrosion.
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Reconnect the Connector: Firmly reconnect the power plug to the PSCM.
Replacement Parts: When Cleaning Isn’t Enough
If cleaning doesn’t resolve the issue, the wiring harness itself may be damaged and require replacement. Consider these GM parts:
- Alternator Battery Control Wiring Harness: Part #84220783
- Power Steering Control Module Wiring Harness: Part #23231301
Conclusion
By addressing corrosion in the PSCM connector, you can often restore your 2014 Chevy Silverado’s power steering functionality and clear those pesky warning lights and DTCs. This simple cleaning procedure can save you a significant amount of money compared to a dealership repair. However, if the problem persists, replacing the relevant wiring harnesses might be necessary. Remember to always consult your vehicle’s repair manual for specific instructions and safety precautions.
