This guide teaches you how to reset the engine light on a 2017 Chevy Silverado using built-in systems or an OBD2 scanner. You’ll also learn when it’s safe to reset and when to seek professional help.
Key Takeaways
- Understand the cause first: Never reset the engine light without diagnosing the underlying issue. Ignoring problems can lead to costly repairs or safety risks.
- Use an OBD2 scanner for accuracy: A diagnostic tool reads trouble codes and safely clears the light after repairs are complete.
- Try the key cycle method as a simple fix: Turning the key on and off three times can reset the light on some 2017 Silverados if no active codes remain.
- Check the gas cap: A loose or damaged gas cap is a common cause of the check engine light and is easy to fix.
- Reset only after repairs: Clearing the light without fixing the problem will cause it to return—and may fail emissions tests.
- Monitor driving behavior post-reset: Drive normally for a few days to ensure the light doesn’t come back and that all systems are functioning properly.
- Consult a mechanic if unsure: Persistent or flashing lights indicate serious issues that require professional diagnosis and repair.
How to Reset Engine Light on 2017 Chevy Silverado
If you’ve noticed the dreaded “Check Engine” light glowing on your 2017 Chevy Silverado’s dashboard, you’re not alone. It’s one of the most common concerns among truck owners—and for good reason. That little orange or yellow engine-shaped icon can mean anything from a loose gas cap to a serious engine malfunction. But before you panic, know this: resetting the engine light is often straightforward, especially once the root cause has been addressed.
In this comprehensive guide, you’ll learn exactly how to reset the engine light on a 2017 Chevy Silverado—safely, effectively, and without unnecessary trips to the dealership. We’ll walk you through multiple methods, from simple DIY fixes to using professional-grade tools. You’ll also discover when it’s safe to reset the light yourself and when it’s time to call in a mechanic.
Whether you’re a seasoned DIYer or a first-time truck owner, this guide is designed to be easy to follow, practical, and full of real-world tips. By the end, you’ll feel confident handling this common automotive issue like a pro.
Why the Engine Light Comes On
Visual guide about How to Reset Engine Light on 2017 Chevy Silverado
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Before diving into the reset process, it’s essential to understand why the engine light—officially known as the Malfunction Indicator Lamp (MIL)—activates in the first place. Your 2017 Chevy Silverado is equipped with an advanced onboard diagnostic system (OBD2) that constantly monitors engine performance, emissions, fuel system efficiency, and other critical components.
When the system detects a problem—such as a misfire, faulty oxygen sensor, or emissions leak—it triggers the check engine light and stores a diagnostic trouble code (DTC). These codes are your first clue to what’s wrong.
Common causes include:
- A loose or damaged gas cap
- Faulty oxygen (O2) sensor
- Catalytic converter issues
- Mass airflow (MAF) sensor problems
- Spark plug or ignition coil failure
- Evaporative emissions system leaks
The key takeaway? Never reset the engine light without first identifying and fixing the underlying issue. Clearing the light without repairs is like turning off a smoke alarm while the house is still on fire—it doesn’t solve the problem.
Tools You’ll Need
Resetting the engine light on your 2017 Silverado doesn’t require a mechanic’s toolbox, but having the right equipment makes the job easier and more reliable. Here’s what you’ll need:
- OBD2 Scanner: This is the most accurate and recommended tool. Affordable models start around $20 and plug into the diagnostic port under the dashboard. Look for one with code reading and clearing capabilities.
- Owner’s Manual: Your Silverado’s manual contains valuable information about dashboard warnings and reset procedures.
- Basic Hand Tools: A screwdriver or wrench may be needed if you’re checking or replacing components like the gas cap or air filter.
- Smartphone or Tablet (Optional): Some Bluetooth OBD2 scanners pair with apps for real-time diagnostics.
If you don’t own an OBD2 scanner, consider purchasing one—they’re reusable and useful for future repairs. Alternatively, many auto parts stores (like AutoZone or O’Reilly) offer free code reading services.
Method 1: Using an OBD2 Scanner (Recommended)
The most reliable and accurate way to reset the engine light on your 2017 Chevy Silverado is by using an OBD2 scanner. This method allows you to read the trouble codes, understand the problem, and safely clear the light after repairs.
Step 1: Locate the OBD2 Port
The OBD2 port in your 2017 Silverado is located under the dashboard, typically on the driver’s side. It’s a 16-pin connector, usually black or gray, and easy to spot once you know where to look. You may need to kneel or crouch to access it comfortably.
Step 2: Plug in the Scanner
Turn off the ignition, then plug the OBD2 scanner into the port. Make sure it’s securely connected. Some scanners power on automatically; others require you to press a button.
Step 3: Turn the Ignition to “On”
Turn the key to the “ON” position (but don’t start the engine). This powers up the vehicle’s computer system and allows the scanner to communicate with it.
Step 4: Read the Trouble Codes
Follow the scanner’s on-screen prompts to read the diagnostic trouble codes (DTCs). These codes—like P0420 or P0171—indicate specific issues. Write them down or take a photo for reference.
For example:
- P0420: Catalyst system efficiency below threshold
- P0171: System too lean (Bank 1)
- P0455: Large evaporative emission leak
Use the scanner’s built-in database or search online to understand what each code means. This step is crucial—don’t skip it.
Step 5: Fix the Underlying Problem
Once you know the cause, address it. For instance:
- If the code points to a loose gas cap, tighten it or replace it.
- If it’s an O2 sensor issue, you may need to replace the sensor (a job best left to professionals if you’re not experienced).
- If it’s a minor issue like a dirty air filter, clean or replace it.
Only proceed to reset the light after the repair is complete.
Step 6: Clear the Codes and Reset the Light
On your OBD2 scanner, select the option to “Clear Codes” or “Erase DTCs.” Confirm the action when prompted. The scanner will send a signal to the vehicle’s computer to reset the check engine light.
After clearing, turn the ignition off, wait 10–15 seconds, then turn it back on. The engine light should be off. If it remains on, the problem may not be fully resolved, or a new code has been generated.
Step 7: Test Drive and Monitor
Take your Silverado for a short drive—about 10–15 minutes—to allow the computer to run its self-checks. If the light stays off, the reset was successful. If it returns, recheck the codes and investigate further.
Method 2: The Key Cycle Reset (Simple DIY Option)
If you don’t have an OBD2 scanner or the issue was minor (like a loose gas cap), you can try the key cycle method. This is a built-in reset procedure that works on many 2017 Silverados.
Step 1: Turn the Ignition On and Off
Sit in the driver’s seat and insert the key. Turn the ignition to the “ON” position (dashboard lights will illuminate), but do not start the engine. Wait about 3 seconds.
Step 2: Turn It Off
Turn the key back to the “OFF” position. Wait another 3 seconds.
Step 3: Repeat the Cycle
Repeat this on-off cycle two more times, for a total of three complete cycles. Each cycle should take about 6 seconds (3 seconds on, 3 seconds off).
Step 4: Start the Engine
After the third cycle, start the engine normally. The check engine light should be off. If it remains on, the problem may still exist, or the reset didn’t take.
Note: This method doesn’t clear stored trouble codes—it only resets the light temporarily. If the issue persists, the light will return. For a permanent fix, use an OBD2 scanner.
Method 3: Disconnecting the Battery (Last Resort)
Disconnecting the vehicle’s battery can reset the engine control module (ECM) and clear the check engine light. However, this method is less precise and can cause other systems (like radio presets or clock settings) to reset.
Step 1: Turn Off the Engine and Remove the Key
Ensure the truck is off and the key is removed from the ignition.
Step 2: Locate the Battery
Open the hood and find the battery. In the 2017 Silverado, it’s typically on the driver’s side.
Step 3: Disconnect the Negative Terminal
Use a wrench to loosen the nut on the negative (-) battery terminal. Carefully remove the cable and tuck it away from the battery to prevent accidental contact.
Step 4: Wait 15–30 Minutes
Leave the battery disconnected for at least 15 minutes. This allows the ECM to fully discharge and reset.
Step 5: Reconnect the Battery
Reattach the negative terminal and tighten the nut securely.
Step 6: Start the Engine
Turn the key and start the truck. The check engine light may be off, but remember: this method doesn’t fix the problem—it only resets the system. If the issue remains, the light will return.
Warning: Disconnecting the battery may also reset other systems, including:
- Radio presets
- Clock and date
- Power window settings
- Adaptive transmission learning (in some cases)
Use this method only if other options aren’t available.
Common Causes and Quick Fixes
Before resetting the light, check these common culprits:
Loose or Damaged Gas Cap
A loose, cracked, or missing gas cap is one of the top reasons for the check engine light. It causes fuel vapors to escape, triggering an evaporative emissions code (like P0455).
How to fix: Turn off the engine, remove the gas cap, inspect it for damage, and reinstall it tightly. Wait a few drive cycles—the light may turn off on its own. If not, use an OBD2 scanner to clear it.
Faulty Oxygen Sensor
The O2 sensor monitors exhaust gases and helps regulate fuel mixture. A failing sensor can reduce fuel efficiency and increase emissions.
How to fix: Use an OBD2 scanner to confirm the code (e.g., P0135). Replacement requires lifting the truck and accessing the sensor near the exhaust manifold. Consider professional help.
Dirty or Clogged Air Filter
A restricted air filter can cause lean fuel conditions and trigger codes like P0171.
How to fix: Open the air filter box, remove the old filter, and replace it with a new one. Reset the light using an OBD2 scanner.
Catalytic Converter Issues
A failing catalytic converter (code P0420) reduces emissions efficiency and can cause poor performance.
How to fix: This is a serious issue that often requires replacement. Consult a mechanic.
Troubleshooting Tips
Even after resetting the light, problems can persist. Here’s how to troubleshoot:
- Light comes back on: The issue wasn’t fully resolved. Recheck codes and inspect related components.
- Flashing check engine light: This indicates a severe misfire that can damage the catalytic converter. Stop driving and seek immediate repair.
- Multiple codes appear: Look for a common cause—like a vacuum leak or electrical issue—that could trigger several sensors.
- No codes, but light is on: Rare, but possible. The light may be stuck or the scanner may not be reading properly. Try a different scanner or visit a shop.
When to See a Mechanic
While many check engine light issues are minor, some require professional attention. Seek a mechanic if:
- The light is flashing
- You notice poor performance, stalling, or rough idling
- Multiple trouble codes appear
- You’re unsure how to interpret or fix the problem
- The light returns immediately after reset
A certified technician can perform advanced diagnostics, such as smoke testing for leaks or inspecting internal engine components.
Final Thoughts
Resetting the engine light on your 2017 Chevy Silverado doesn’t have to be intimidating. With the right tools and knowledge, you can tackle many common issues yourself. Always start by diagnosing the problem—don’t just clear the light and hope for the best.
Using an OBD2 scanner is the gold standard, but simple fixes like tightening the gas cap or cycling the ignition can work in a pinch. Remember: safety and proper repair come first. When in doubt, consult a professional.
By following this guide, you’ll not only reset the engine light but also gain valuable insight into your truck’s health—helping you avoid bigger problems down the road.