How Does the Fuel Evaporative Emissions Control (EVAP) System, Canister Purge Valves, Fuel Pressure Sensor and Vapor Canister Work on Chevrolet Trailblazer?

The evaporative emissions control (EVAP) system of fuel has various parts including the canister, purge valve, vent valve, fuel tank pressure sensor, fuel tank and vapor and purge lines. The system functions by soaking up petrol fumes from the fuel tank as well as discharging them to the engine inlet during engine operation. The vapors are absorbed by the canister which is filled with activated charcoal; they are then drawn into the intake manifold and combustion chamber through purge hose under intake manifold vacuum. The PCM modulates the flow of vapors by regulating duty cycle on EVAP purge valve control solenoid. At cold start, the system does a self-diagnostic test with PCM monitoring fuel tank pressure sensor voltage for any leakages. There are step-by-step instructions provided to replace EVAP canister, purge valve, vent valve and fuel tank pressure sensor for each of these components.

Genuine Chevrolet Trailblazer Canister Purge Valves

Fuel Tank Evaporator Purge Control Valve

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4 Canister Purge Valves found

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Chevrolet Trailblazer Valve,Evap Emission Canister Purge Solenoid
Part Number: 1997278
$37.13 MSRP: $69.54
You Save: $32.41 (47%)
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Product Specifications
- Other Name: VALVE, Fuel Tank Evaporator/Purge Control
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2002-2004 Chevrolet Trailblazer | 4 DOOR, 4 DOOR EXT | 6 Cyl 4.2L
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Chevrolet Trailblazer Evap Emission Canister Purge Solenoid Valve Assembly
Part Number: 12597567
$33.14 MSRP: $67.60
You Save: $34.46 (51%)
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Product Specifications
- Other Name: VALVE, Fuel Tank Evaporator/Purge Control
- Replaced by: 12735397
- Replaces: 12606684, 12597566, 12570469, 12597341
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2005-2009 Chevrolet Trailblazer | 4 DOOR, 4 DOOR EXT | 6 Cyl 4.2L, 8 Cyl 5.3L, 8 Cyl 6.0L
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Chevrolet Trailblazer Vapor Canister Purge Solenoid Valve
Part Number: 12666845
$17.16 MSRP: $32.38
You Save: $15.22 (47%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Valve Assembly Evap Emis Cnstr Purge Sol; Purge Valve
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2021-2025 Chevrolet Trailblazer | 4 DOOR EXT, LEVEL II 4 DOOR EXTENDED, LEVEL III 4DOOR EXTENDED, LEVEL IV 4 DOOR EXTENDED, LEVEL V 4 DOOR EXTENDED | 3 Cyl 1.2L, 3 Cyl 1.3L
View related parts
Chevrolet Trailblazer Valve,Evap Emission Canister Purge Solenoid
Part Number: 1997279
$41.70 MSRP: $74.80
You Save: $33.10 (45%)
Product Specifications
- Other Name: VALVE, Fuel Tank Evaporator/Purge Control; Purge Control Valve, Purge Solenoid, Purge Valve
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2003-2004 Chevrolet Trailblazer | 4 DOOR, 4 DOOR EXT | 8 Cyl 5.3L

Chevrolet Trailblazer Canister Purge Valves

Chevrolet Trailblazer Canister Purge Valves trap fuel vapors and divert them into the engine instead of the sky, reducing hydrocarbon pollution and helping the SUV to run cleaner. Each valve is located in the EVAP system along with the charcoal canister and opens when engine vacuum increases so that vapor blends with the air fuel mix and burns during normal combustion. Early generations applied simple vacuum-controlled Canister Purge Valves that only opened during cruising, while later OBD II versions on the Chevrolet Trailblazer use electronically commanded Canister Purge Valves that the engine computer pulses for precise flow and built-in leak testing. During self checks, the ECM simultaneously seals the vent solenoid and energizes the modern Canister Purge Valves, then monitors the fuel tank pressure sensor for a stable vacuum, which is a way of detecting loose caps or small leaks before smog-forming vapors escape. Routine replacement intervals are not normally listed as the Chevrolet Trailblazer hardware typically lasts for many years unless contaminated fuel clogs the valve. Despite modifications to the design, all of the Chevrolet versions of the Trailblazer use these durable Canister Purge Valves to maintain emissions regulations, protect fuel economy, and prevent that warning light on your dashboard from ruining a road trip.

Each OEM Chevrolet Trailblazer Canister Purge Valves we offer is competitively priced and comes with the assurance of the manufacturer's warranty for the part. Furthermore, we guarantee the speedy delivery of your orders right to your doorstep. Our hassle-free return policy is also in place for your peace of mind.

Chevrolet Trailblazer Canister Purge Valves Parts Questions & Experts Answers

Valve,Evap Emission Canister Purge Solenoid
1997279
Q: How Does the Fuel Evaporative Emissions Control (EVAP) System, Canister Purge Valves, Fuel Pressure Sensor and Vapor Canister Work on Chevrolet Trailblazer?
A:
The evaporative emissions control (EVAP) system of fuel has various parts including the canister, purge valve, vent valve, fuel tank pressure sensor, fuel tank and vapor and purge lines. The system functions by soaking up petrol fumes from the fuel tank as well as discharging them to the engine inlet during engine operation. The vapors are absorbed by the canister which is filled with activated charcoal; they are then drawn into the intake manifold and combustion chamber through purge hose under intake manifold vacuum. The PCM modulates the flow of vapors by regulating duty cycle on EVAP purge valve control solenoid. At cold start, the system does a self-diagnostic test with PCM monitoring fuel tank pressure sensor voltage for any leakages. There are step-by-step instructions provided to replace EVAP canister, purge valve, vent valve and fuel tank pressure sensor for each of these components.