2020 Chevy Silverado Power Steering Problems and Fixes 2026
Last Updated on June 24, 2026 by Albert Duke
2020 Chevy Silverado power steering problems usually show up as heavy steering, a “Service Power Steering” warning, steering assist loss, or steering wheel shake at highway speed.
The 2020 Silverado 1500 uses electric power steering, so the problem is not always a simple fluid or pump issue. In many cases, the fault can involve grounds, steering module codes, tire balance, steering gear calibration, or a failing steering rack.
The fastest way to narrow it down is to match the symptom to the most likely system.
5 Main Symptoms On 2020 Silverado
The first step is identifying what your Silverado is actually doing.
Power steering complaints on the 2020 Chevy Silverado do not all point to the same repair. A warning message, a shaking steering wheel, and a full loss of assist are three different diagnostic paths.
Common symptoms include:
- Heavy steering at startup: The steering wheel feels hard to turn as soon as the truck starts.
- Service Power Steering message: The dash may show “Service Power Steering” or “Steering Assist Reduced Drive With Care.”
- Steering warning with brake or ESC warning: Some owners report steering warnings appearing with brake assist, Service ESC, or check engine messages.
- Steering wheel shake at highway speed: This often feels like a quick steering wheel oscillation between 50 and 80 mph.
- Intermittent assist loss: Steering assist may disappear, then return after the truck is restarted.
CarComplaints lists NHTSA steering complaints for the 2020 Silverado 1500, including reports of failed ground straps and reduced steering assist warnings. That does not prove every truck has the same defect, but it confirms that steering complaints are a real owner-reported pattern for this model year. CarComplaints lists 2020 Silverado 1500 steering complaints from NHTSA.
Once the symptom is clear, the next step is knowing which causes are most likely.
6 Common Causes Of Silverado Steering Failure
Most 2020 Silverado steering complaints fall into six buckets.
Some are electrical. Some are mechanical. Some are vibration issues that feel like steering failure but are not the same problem.
Poor Ground Connections
A poor ground is one of the most important checks on a 2020 Silverado with electric power steering assist problems.
GM diagnostic guidance says lack of power steering assist with C1597 or C1599 may be caused by a poor ground at one of the main ground cable or strap connections. The bulletin tells technicians to inspect ground straps and cable connections for looseness, corrosion, broken braided straps, and eyelet movement. GM diagnostic tip PIT6088 identifies poor ground connections as a possible cause.
Steering Control Module Codes
The power steering system can store codes outside the engine computer.
That means a basic check engine light scanner may miss steering, brake, body, and chassis module faults. A scan tool that reads only generic engine codes may not show the reason for the steering warning.
For scanner guidance, Car Mechan’s guide to the best OBD2 scanner for the money can help owners understand why module coverage matters.
Electric Steering Gear Problems
If power, grounds, battery condition, and module communication test correctly, the electric steering gear or rack becomes a stronger suspect.
This is usually not the first part to replace. The steering rack is expensive, and replacing it before checking grounds can turn a small electrical issue into a large repair bill.
Weak Battery Or Charging Issue
Electric power steering depends on stable voltage.
If the battery is weak or the charging system is unstable, steering assist can behave strangely. Do not guess voltage problems by looking at the battery age alone. Have the battery and alternator tested under load.
If your truck sits for long periods or shows weak battery symptoms, a quality maintainer from Car Mechan’s best car battery charger guide can help prevent low-voltage problems.
Tire And Wheel Road Force
A shaking steering wheel is often a tire, wheel, or road-force issue.
This is especially true if the steering assist still works normally, but the wheel vibrates at highway speeds. Do not diagnose that the same way as a truck with no assist.
Steering Gear Calibration
Some 2020 Silverado trucks may need calibration work if the issue is steering dither, not assist loss.
GM bulletin 19-NA-240 covers steering wheel dither, shake, or quick oscillation at 50 to 80 mph. It points technicians toward tire road force, wheel balance, or steering gear calibration checks. GM bulletin 19-NA-240 outlines steering dither diagnosis and repair procedures.
The ground strap issue deserves special attention because it can affect more than steering.
Why Ground Straps Cause Multiple Warnings
A bad ground strap can make the truck act like several modules failed at once.
A ground strap is an electrical return path between the engine, frame, body, and control modules. If that connection becomes loose, corroded, or broken, modules may see unstable voltage or poor communication.
That can trigger symptoms that look unrelated:
- Power steering assist warning
- Brake assist warning
- Service ESC message
- Check engine light
- Reduced power message
- Intermittent electrical faults
This is why a 2020 Silverado can show steering and brake warnings together. The steering rack may not be the root cause. The truck may be losing a reliable electrical path.
Do not replace the steering rack first unless the diagnosis supports it. A ground inspection is cheaper and more logical than starting with the most expensive part.
If your warning pattern includes steering, brake assist, and ESC messages together, the truck needs a proper scan and ground inspection before parts are replaced.
If your warnings match this pattern, scanning the truck is the next useful step.
Which Codes Point To Steering Assist Issues
Codes matter because the steering warning may not store in the engine computer.
A generic OBD2 scanner usually reads powertrain codes. It may not read power steering control module, brake control module, body control module, or chassis communication codes.
Use this table as a starting point.
| Code Or Warning | What It Suggests | What To Do First |
|---|---|---|
| C1597 | Possible power steering assist related fault | Scan the power steering control module |
| C1599 | Possible power steering assist related fault | Inspect grounds and module data |
| Service Power Steering | Steering system warning stored outside engine computer | Use a scan tool with chassis coverage |
| Steering Assist Reduced | Reduced assist warning or module issue | Check voltage, grounds, and steering codes |
| Service ESC With Steering Warning | Possible shared electrical or communication issue | Scan multiple modules before replacing parts |
Do not clear the codes before saving them. Take photos of the warning messages and save the scan report.
Codes help narrow the fault, but the driving symptom still decides how urgent the repair is.
When Steering Shake Is Not Assist Failure
A shaking steering wheel is not the same problem as losing power steering assist.
If the steering wheel shakes at highway speed but the truck still turns normally, start with tires, wheels, road force, and balance. That symptom does not automatically mean the electric steering rack has failed.
If the steering becomes heavy and the truck displays a power steering warning, that is a different situation. That points more toward assist loss, module faults, voltage problems, or ground issues.
Use this quick distinction:
- Shake at 50 to 80 mph: Suspect tire road force, wheel balance, or calibration.
- Heavy steering at low speed: Suspect assist loss, electrical supply, or steering module issue.
- Warnings plus brake or ESC lights: Suspect shared electrical, ground, or communication issues.
- Assist returns after restart: Suspect intermittent electrical, software, or module behavior.
This distinction matters because vibration repairs and assist-loss repairs use different diagnostic paths.
After separating vibration from assist loss, the repair path becomes much easier to choose.
How To Diagnose The Problem In 5 Steps
Use this order so you do not start with the most expensive part.
The goal is to separate a simple voltage or ground issue from a steering gear or module failure.
Confirm The Exact Symptom
Write down when the problem happens.
Does it happen at startup, while parking, at highway speed, after hitting bumps, or only when towing? This detail matters because electric assist loss and steering vibration are not the same problem.
Check Battery And Charging Condition
Have the battery and alternator tested under load.
A weak battery can create strange electrical behavior even if the truck still starts. Do not skip this check if multiple warnings appear at the same time.
Inspect Visible Grounds
Look for loose, corroded, damaged, or broken ground straps.
A visual inspection is not a full diagnosis, but it can catch obvious failures. If the strap is green with corrosion, loose at the eyelet, or broken, repair that before assuming the steering rack failed.
Scan Steering And Brake Modules
Use a scanner that can read chassis and body modules.
If your tool only shows engine codes, it may miss the steering data. Ask the shop to document steering, brake, ESC, and body module codes before clearing anything.
Check Bulletins And Dealer Programming
Some problems require GM service information or dealer-level programming.
This is especially true for steering gear calibration and recurring steering warnings. If the truck has repeated assist warnings, dealer-level diagnosis may save money compared with replacing parts by guesswork.
The result of these checks decides whether this is a DIY inspection, shop diagnosis, or dealer visit.
When To Stop Driving Your Silverado
Do not treat every steering warning as a reset problem.
Stop driving and arrange diagnosis if the steering assist disappears while moving, the wheel suddenly becomes very hard to turn, or the steering warning appears with brake assist warnings.
You should also avoid towing until the issue is diagnosed. A truck with intermittent steering assist is harder to control under load, especially at low speed, in parking lots, or during trailer maneuvering.
If the truck shows a Service Brake System message along with steering warnings, Car Mechan’s Silverado guide on how to reset the Service Brake System light on Silverado explains why brake warnings should not be ignored.
For open recalls, check the truck by VIN through the official NHTSA recall lookup before paying for safety-related repairs.
If the truck is safe enough to move, the next question is repair cost.
What 2020 Silverado Steering Repairs Cost
The repair cost depends on whether the problem is electrical, software-related, or mechanical.
A ground strap repair should usually cost far less than replacing the steering rack, but the final price depends on labor time, location, corrosion, and whether the repair requires additional diagnostics.
Here is the practical cost path.
| Repair Path | Typical Cost Logic | Best Next Step |
|---|---|---|
| Ground inspection or repair | Usually cheaper than rack replacement, but quote required | Ask for photos of the failed ground |
| Battery or charging repair | Cost depends on failed part and labor | Test before replacing steering parts |
| Module scan and diagnosis | Diagnostic fee varies by shop | Request printed module codes |
| Steering gear calibration | May require dealer-level tools | Ask whether a bulletin applies |
| Rack and pinion replacement | RepairPal lists Silverado 1500 rack replacement at $2,090 to $2,266 | Approve only after electrical checks |
RepairPal currently estimates Chevrolet Silverado 1500 rack and pinion replacement at $2,090 to $2,266, with labor and parts separated in its estimator. RepairPal lists Silverado 1500 rack and pinion replacement cost estimates.
Do not approve a rack replacement only because the dash says “Service Power Steering.” The warning tells you there is a steering system fault. It does not prove the most expensive part has failed.
With symptoms, codes, and cost paths clear, the final decision comes down to the warning pattern.
Quick Decision Guide For Owners
Use this quick guide if you only know the symptom.
2020 Silverado Power Steering Decision Guide
Match the symptom first. A steering warning with brake or ESC messages is more urgent than a simple highway vibration.
| Your Symptom | Most Likely Category | First Check | Best Next Step | Urgency |
|---|---|---|---|---|
| Heavy Steering At Startup | Assist, voltage, or ground issue | Battery test, ground inspection, steering module scan | Use a shop scan before replacing parts | High |
| Service Power Steering Only | Stored steering module warning | Power steering control module scan | Document codes before clearing them | Medium |
| Steering Warning With Brake Assist | Possible shared ground or electrical fault | Main ground straps and multi-module scan | Avoid guessing at the steering rack first | High |
| Shake At 50 To 80 MPH | Tire, wheel, road force, or calibration issue | Road force balance and bulletin check | Start with tire and wheel diagnosis | Medium |
| Assist Loss While Driving | Safety-critical steering assist failure | Stop driving and save warning details | Arrange tow or dealer-level diagnosis | Very High |
| Warning Returns After Restart | Intermittent electrical or module fault | Scan before clearing codes | Check grounds, voltage, and module history | High |
| Your Symptom | Most Likely Category | First Check | DIY Or Shop | Urgency |
|---|---|---|---|---|
| Heavy steering at startup | Assist or voltage issue | Battery, grounds, steering codes | Shop scan recommended | High |
| Service Power Steering only | Steering module warning | Scan power steering module | Shop or dealer | Medium |
| Steering warning plus brake assist | Shared electrical or ground issue | Ground straps and multi-module scan | Shop or dealer | High |
| Steering shake at 50 to 80 mph | Tire, wheel, or calibration issue | Road force, balance, bulletin check | Tire shop or dealer | Medium |
| Assist loss while driving | Safety-critical assist failure | Stop driving and diagnose | Tow or dealer | Very high |
| Warning returns after restart | Intermittent electrical or module fault | Save codes before clearing | Shop scan recommended | High |
The safest repair decision is the one based on symptoms and stored codes, not guesses.
Best Next Step For Silverado Owners
The practical final verdict is simple: do not assume every 2020 Chevy Silverado power steering problem means the steering rack is bad.
Start with the symptom, then check battery health, main grounds, and stored steering module codes. If the warning appears with brake assist or ESC messages, treat it as a higher-priority electrical or safety issue.
If steering assist disappears while driving or keeps returning after restart, stop driving the truck until it is diagnosed. A structured scan and ground inspection can prevent unnecessary parts replacement and help you approve the right repair.
FAQ
Why Does My 2020 Silverado Say Service Power Steering
Your 2020 Silverado says Service Power Steering when the truck detects a fault in the steering assist system or related control modules. The cause may be electrical, module-related, calibration-related, or mechanical, so scan the steering module before replacing parts.
Can A Bad Ground Cause Power Steering Problems On A Silverado
Yes, a bad ground can cause power steering assist problems on some Silverado trucks. GM diagnostic guidance links lack of power steering assist and certain steering control module codes to poor main ground cable or strap connections.
Is It Safe To Drive A Silverado With No Power Steering Assist
No, you should not keep driving if power steering assist disappears. Manual steering may still be possible, but the truck can require much more effort, especially at low speed, while parking, or while towing.
Does The 2020 Chevy Silverado Have Electric Power Steering
Yes, the 2020 Chevy Silverado 1500 uses electric power steering assist. That means diagnosis should focus on voltage, grounds, modules, calibration, and steering gear condition instead of only fluid level or hydraulic pump failure.
Can A Regular OBD2 Scanner Read Silverado Steering Codes
Some regular OBD2 scanners cannot read Silverado steering codes because those codes may be stored outside the engine computer. Use a scan tool with chassis, body, brake, and steering module coverage, or ask a shop for a full module scan.
