The APDTY 137178 vapor canister vent solenoid wire wiring harness connector is a direct-replacement emissions component designed to restore proper electrical connection to your vehicle's EVAP system purge or vent valve. This jumper harness repairs damaged, corroded, or melted factory wiring that causes check engine lights, failed emissions tests, and fuel vapor leaks on a wide range of 2002-2016 GM cars, trucks, and SUVs.
Key Takeaways
- Direct replacement for GM OE part 19257603, compatible with multiple vapor canister solenoid valves
- Fits 2002-2016 Buick, Cadillac, Chevrolet, GMC, Hummer, Isuzu, Pontiac, Saturn, and Suzuki models
- Repairs common EVAP system wiring failures that trigger P0496, P0445, P0446, and related OBD-II codes
- Quick plug-and-play installation eliminates the need to replace entire wiring harnesses
- Must comply with federal, state, and local emissions regulations for legal on-road use
Buy APDTY 137178 directly from APDTY
What Does the Vapor Canister Vent Solenoid Wiring Harness Do?
The vapor canister vent solenoid wiring harness connector delivers electrical signals from your vehicle's powertrain control module (PCM) to the EVAP system vent or purge solenoid valve. This valve controls when fuel vapors stored in the charcoal canister are vented to the atmosphere or purged into the engine intake for combustion, preventing harmful hydrocarbon emissions and maintaining proper fuel tank pressure.
When the factory wiring connector becomes brittle, corroded, or heat-damaged—common on vehicles 10+ years old—the PCM loses control over the solenoid valve. This disrupts the entire evaporative emissions system, often triggering diagnostic trouble codes and illuminating the check engine light.
What Are the Symptoms of a Bad Vapor Canister Vent Solenoid Connector?
A failing or damaged vapor canister vent solenoid wiring harness typically causes one or more of the following issues:
- Check engine light with codes P0496 (EVAP Flow During Non-Purge), P0445 (Purge Control Valve Circuit Shorted), P0446 (EVAP Vent Control Circuit), or similar EVAP system fault codes
- Failed emissions test due to incomplete EVAP system readiness monitors or visible vapor leaks
- Fuel smell near the rear or underside of the vehicle from uncontrolled fuel vapor venting
- Hard starting or rough idle if the purge valve remains stuck open, causing a vacuum leak
- Visible wire damage—melted insulation, broken pins, corrosion, or rodent chewing at the solenoid connector
If you observe these symptoms and a visual inspection reveals connector damage, replacing the wiring jumper harness is often the fastest and most cost-effective repair, avoiding the expense of a full underbody harness replacement.
Which Vehicles Does APDTY 137178 Fit?
APDTY part number 137178 is engineered to fit the following GM vehicles. Always verify your specific year, make, and model using the live compatibility chart on the product page, as certain trim levels, engine options, or build dates may vary:
| Make | Model | Years |
|---|---|---|
| Buick | Allure | 2007-2010 |
| Buick | LaCrosse | 2007-2011 |
| Buick | Lucerne | 2006-2011 |
| Buick | Regal | 2011 |
| Cadillac | CTS | 2003-2011 |
| Cadillac | DTS | 2006-2011 |
| Cadillac | Escalade / ESV / EXT | 2007-2010 / 2007-2008 |
| Cadillac | SRX | 2004-2009 |
| Cadillac | STS | 2005-2011 |
| Chevrolet | Avalanche | 2007-2009 |
| Chevrolet | Camaro | 2011 |
| Chevrolet | Caprice | 2011 |
| Chevrolet | Cobalt | 2005-2010 |
| Chevrolet | Colorado | 2004-2010 |
| Chevrolet | Cruze | 2011 |
| Chevrolet | Equinox | 2005-2011 |
| Chevrolet | HHR | 2006-2011 |
| Chevrolet | Impala | 2007-2013 |
| Chevrolet | Impala Limited | 2014-2016 |
| Chevrolet | Monte Carlo | 2007 |
| Chevrolet | Silverado 1500 / 2500 HD | 2010 |
| Chevrolet | Suburban 1500 | 2007-2009 |
| Chevrolet | Tahoe | 2007-2010 |
| GMC | Canyon | 2004-2010 |
| GMC | Sierra 1500 / 2500 HD | 2010 |
| GMC | Terrain | 2010-2011 |
| GMC | Yukon / XL 1500 | 2007-2010 |
| Hummer | H3 / H3T | 2006-2010 / 2009-2010 |
| Isuzu | i-280 / i-290 / i-350 / i-370 | 2006-2008 |
| Pontiac | G5 | 2007-2010 |
| Pontiac | Grand Prix | 2007-2008 |
| Pontiac | Pursuit | 2005-2006 |
| Pontiac | Torrent | 2006-2009 |
| Saturn | Ion | 2003-2007 |
| Saturn | Vue | 2002-2010 |
| Suzuki | XL-7 | 2007-2009 |
This harness is not universal. If your vehicle is not listed, this part will not fit. Check the compatibility chart on the product page before ordering.
Specifications and OE Replacement Information
APDTY 137178 is manufactured to meet or exceed OE specifications, ensuring proper fit, connector engagement, and electrical performance:
| Specification | Details |
|---|---|
| APDTY Part Number | 137178 |
| Replaces OE Part Number | 19257603 |
| Compatible Solenoid Valves | 214-2324, 20907779, 20995471, 20995472, 214-2308, 23481275 |
| Component Type | Vapor Canister Vent/Purge Solenoid Wire Wiring Jumper Harness Connector |
| Condition | Brand New |
| System | Evaporative Emissions (EVAP) |
This jumper harness is designed to work with multiple GM vapor canister purge and vent solenoid valves. If you are also replacing the solenoid itself, verify part number compatibility on the product page or consult your vehicle's service manual.
How to Install the Vapor Canister Vent Solenoid Wiring Harness
Replacing the vapor canister vent solenoid wiring harness connector is a straightforward repair that most DIYers can complete in under 30 minutes with basic hand tools. The solenoid is typically located on or near the EVAP canister under the rear of the vehicle, behind the fuel tank, or in the engine bay, depending on your model.
General installation steps:
- Locate the vent or purge solenoid—consult your repair manual or follow the EVAP system lines from the canister or intake manifold.
- Disconnect the negative battery cable to prevent accidental shorts or DTC logging during the repair.
- Unplug the damaged factory connector from both the solenoid valve and the vehicle's main harness.
- Remove any retaining clips or fasteners securing the old harness to the chassis or canister bracket.
- Install the new APDTY 137178 jumper harness, ensuring the connectors click firmly into place on both the solenoid and vehicle harness ends.
- Secure the new harness with clips or zip ties to prevent chafing or contact with hot exhaust components.
- Reconnect the battery and clear any stored diagnostic trouble codes with an OBD-II scanner.
- Perform a drive cycle as specified in your service manual to allow the PCM to complete EVAP system readiness monitors.
If the check engine light returns or EVAP codes persist, inspect the vapor canister, purge valve, vent valve, fuel cap, and associated hoses for additional faults. A smoke test performed by a professional shop can pinpoint leaks in the system.
Emissions Compliance and Legal Use Notice
Important: This vapor canister vent solenoid wiring harness is an emissions-related component. Installation and use must comply with all applicable federal, state, and local emissions regulations. Tampering with or removing emissions control devices is illegal under the Clean Air Act and may result in fines or failed vehicle inspections. This part is intended for repair and restoration of OE emissions systems only, and should not be used to modify or defeat emissions controls. Always ensure that your vehicle's EVAP system is functioning as designed and passes all required emissions testing after repair.
Frequently asked questions
Will APDTY 137178 fix my P0496 or P0446 check engine light code?
If the code is caused by a damaged, corroded, or broken wiring connector at the vapor canister vent or purge solenoid, yes—replacing the harness with APDTY 137178 will restore proper electrical function and typically clear the fault code. If the solenoid valve itself is failed or there are additional leaks in the EVAP system, further diagnosis and repairs may be needed.
Is this harness compatible with aftermarket vapor canister solenoid valves?
APDTY 137178 is designed to work with OE and OE-replacement solenoid valves that use the same connector design as GM part numbers 214-2324, 20907779, 20995471, 20995472, 214-2308, and 23481275. Verify connector match before installation.
Do I need to clear the check engine light after installing this harness?
Yes. After installation, use an OBD-II scanner to clear stored diagnostic trouble codes. Then drive the vehicle through a complete drive cycle (city and highway) to allow the PCM to verify repairs and set EVAP system readiness monitors. If the fault is fixed, the light will stay off and monitors will complete.
Can I install this harness without removing the fuel tank?
In most cases, yes. The vapor canister vent solenoid is typically accessible from under the rear of the vehicle without dropping the fuel tank. However, access varies by model—consult your vehicle's service manual or use a lift for easier access.
The APDTY 137178 vapor canister vent solenoid wiring harness connector is a cost-effective, plug-and-play solution for repairing damaged EVAP system wiring on 2002-2016 GM vehicles. By restoring proper electrical connection to the purge or vent solenoid, this jumper harness eliminates check engine lights, ensures emissions compliance, and prevents costly full-harness replacements. Whether you're a DIY enthusiast or a professional technician, APDTY 137178 offers OE-quality construction and direct-fit compatibility for fast, reliable repairs. Verify your vehicle fitment using the live compatibility chart, order today, and get your EVAP system back to factory-spec performance.