Evap purge pump underspeed 2021 trailblazer

shbox. 520 posts · Joined 2016. #3 · Jul 6, 2022. 2.0L ? DTC P1467. Evaporative Emission Canister Purge Pump Underspeed. Conditions For Setting The DTC. P1467. Evaporative Emission Canister Purge Pump Speed & Desired EVAP Purge Pump Speed = Not within a calibrated range - For greater than 5 s.

At this point there should be no change in pressure. If you see it create a vacuum. Then you know your issue is related to the purge valve being stuck open. You can remove the purge valve from the vehicle and blow into it from both ends. If you can blow through it then that would be a bad purge valve. You should not be able to blow through it ...A P0496 code implies that there's an unacceptable amount of intake vacuum flow into the evaporative emissions system. Some of the causes of this problem are: a faulty purge or vent solenoid, defective fuel pressure sensor, incorrect electrical connections and faulty vent solenoid. Though this trouble code doesn't cause any major problems ...Step 6. Remove the spare tire to access the vent valve solenoid assembly on the fuel tank. This is located on the rear inboard side of the tank near the rear axle and drive shaft. Gently remove the wire and test the solenoid with the voltmeter to make sure it is working. If the Check Engine light remains lit after all of these checks then you ...Created and updated by William Orellana on Mar 10, 2021. Possible Causes; ... The air/fuel vapor mixture continues through the EVAP purge pipe and EVAP purge valve into the intake manifold to be consumed during normal combustion. The EVAP system requires the PCM be able to detect a leak as small as 0.040 inch in the EVAP system.The purge valve solenoid opens the valve momentarily to create a vacuum in the line that runs from the canister to the engine bay. I took the cable off of the purge valve solenoid and used a 12v signal to force it open and the engine starts idling rough and sounding like it will stall similar to a vacuum leak.When changing the EVAP purge solinoid on a 2008 trailblazer, how do you open and hose clamps that attach the hoses to the solinoid valve? Submitted: 11 years ago. Category ... 2005 Tahoe can't pump gas replaced charcoal tank replaced selenoid checked electric current to selenoid changed hoses still can't pump gas without it coming back out ...The Evaporative Emission System (EVAP) is a system in your vehicle that stores fuel vapors, which then are directed into the engine to be used. Inside the fuel tank, fuel vapors build due to motion and heat. Instead of letting the fuel vapors escape into the atmosphere, which is harmful to the environment, the EVAP system disposes of them in a ...

2020-09-24. Recall no. 20V588000. General Motors LLC (GM) is recalling certain 2020 Chevrolet Corvette and Cadillac CT4, CT5 and XT4, 2021 Chevrolet Trailblazer, and 2020-2021 Buick Encore GX ...Buy a 2021 Chevrolet Trailblazer Vapor Canister Purge Pump at discount prices. Choose top quality brands Standard Motor Products. ... Standard Motor Products Vapor Canister Purge Pump . Part Number: 151876-06421182. Brand: Standard Motor Products. Notes: Vapor Canister Purge Pump. Condition: New. Shipping Options: Ground $ 100.97 . …psnyder53. Registered. 2022 TB LT awd 1.3 2020 Tacoma SR5. Joined May 1, 2022. 179 Posts. #21 · Apr 14, 2024. Go to the National Highway Traffic Safety Administration. You can access the letter there. N232395310 is the number on the letter for the coverage.Code Tech Notes. Some 2019-2020 Chevrolet Silverado and GMC Sierra with 2.7L engine may have the Service Engine Soon (SES) Warning Light ON with Diagnostic Trouble Code (DTC) P1467 and/or P1469 set in the Engine Control Module (ECM). The cause is the Evaporative Emission Purge Pump may be filling with liquid fuel due to overfilling the fuel tank.Manufacturer Part Number: 12698940 12703879 12712982 25204641 25206066 55516874. Type: Vapor Canister Purge Pump. 1 x Vapor Canister Purge Pump. Chevrolet Blazer 2020-2021. Our warehouses Covering East and West of the States, for your convinence.The canister purge valve (CPV), also known as a purge valve solenoid, is a main component of the evaporative emissions (EVAP) system which recirculates fuel vapor from the fuel tank to the engine intake manifold. This process helps reduce emissions and increase fuel economy in the vehicle by reducing fuel loss due to evaporation.

Purge Valve 1.3L turbo. 1.2L turbo. XT4. CT4. Silverado, sierra. 2.7l. 2019. Location-Engine Bay. Acadia. 2.0l. Blazer. 2.0l.The following TSBs of Chevrolet are related to DTC P1467. 2019 Chevrolet Silverado 1500 Electrical System TSB Details …. 2019 Chevrolet Silverado 1500 Electrical System Software TSB Details …. 2019 Chevrolet Silverado 1500 Engine TSB Details …. 2019 Chevrolet Silverado 1500 Others TSB Details ….P0445 is a common OBD II trouble code. It's generic, which means that it has the same meaning for the Chevy Trailblazer as it would for any other vehicle. It indicates that there is a short circuit in the Evaporative Emissions Control (EVAP) System. P0445 is typically caused by a short circuit (as the code suggests) or by a bad purge valve ...Vapor Canister. Included with: Air outlet duct, Outlet duct, Turbocharger, Valve assembly. A failed evap purge solenoid in your vehicle's evaporative emissions system will often have no noticeable symptoms beyond a check engine light, but it does cause your 2020 Buick Encore GX to operate inefficiently and produce higher emissions. Our ...Item: Purge Pump Voltage: 120V Material: Plastic Housing, Steel Shaft For Use With: Evaporative Coolers, 6500 cfm Evaporative Cooler Accessory Item: Purge Pump Standards: UL Includes: Pump and Drain Hose. Product information . Package Dimensions : 2 x 2 x 2 inches : Item Weight : 3.1 pounds : Manufacturer : CAI - ESSICK AIR PRODUCTS :TSBs 685. Lemon Law. TSB Document: MC-10187203-9999.pdf. Affected Component: AIR BAGS. Summary. This Preliminary information communicates that a customer may bring a vehicle in with an SES light ...

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rczrider said: CEL's been on for the past month or so with the same P1450 code. Mechanic hooked it up to the machine and thought they found a tiny leak in a hose, replaced it, CEL came back. Replaced the evap purge valve (the whole spider-looking assembly), but CEL is back with the same code, both times the following days and in less than 50 miles.Leak Detection Pump (LDP) is also on top of rear subframe, but more centrally located. P0455 can be due to several things including big leak in system, or bad LDP that won't run to draw a vacuum. Smoke test failed to identify any obvious leaks. Mitchell1 register indicates most common cause at this age is bad LDP.Buy 2021 Chevrolet Blazer Solenoid Assembly - Evaporator EMIS CNSTR. XT5. EVAP Purge Control Emissions, Make, Purge - OEM Chevrolet Part # 84802774 (84065747, 85123399) Toggle Navigation. GMPartsCorp. 404 Jake Alexander Boulevard South, Salisbury, NC, 28147. ... EVAP Purge Control Solenoid - Repair or Replace ...The average cost for a Chevrolet Silverado 1500 Fuel Evaporative Canister Replacement is between $600 and $633. Labor costs are estimated between $52 and $66 while parts are priced between $548 and $568. This range does not include taxes and fees, and does not factor in your unique location. Related repairs may also be needed.2019 Cadillac XT4 ONLY, for any evap or fuel line connection issue (for issues covered under warranty only). Symptoms also may include: P0442 - Evap emission small leak. P0455 - Evap emission large leak. P1467/P146C - Evap purge pump connections near engine. Fuel odor/liquid leak in pressurized fuel feed lines.

Step 2: Look at the Hoses. Start by locating the purge valve solenoid and tracing the lines that connect to it as far as they run. If any of them are cracked, broken, or disconnected, repair them and see if that clears P0441. If you live in a drier climate, or your Blazer is older/has high mileage, cracked hoses can throw P0441.Buy Now!New Vapor Canister Purge Solenoid Valve from 1AAuto.com http://1aau.to/ib/1AEEV00020This video shows you how to install a vapor canister purge valve ...Vapor Canister Vent SolenoidVapor Canister Purge Solenoid. Fits XT5 XT5. EVAP Purge Control Solenoid - Repair or Replace A failed evap purge solenoid in your vehicle's evaporative emissions system will often have no noticeable symptoms beyond a check engine light, but it does cause your 2021 Chevrolet Blazer to operate inefficiently and produce higher emissions.I had the EVAP Purge Solenoid and the alternator replaced in my 2006 TB today. After about an hour the check engine code came back on. Mechanic checked the code, and it is still the same code saying to EVAP solenoid. ... Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum. 1.3M posts 174.3K members Since 2004 A forum community dedicated to ... 2021 Chevrolet Trailblazer ACTIV 1.3L L3 - Gas Catalog; ... Vapor Canister Purge Pump #12712982 . 25204641 . ... Evaporative Emission Pipe . EVAP smoke machine leak checker; Hand vacuum pump; Vehicle specific service manual; STEP 1: RESET THE CHECK ENGINE LIGHT. Reset the Check Engine Light to see if the Check Engine Light returns in the future. STEP 2: TEST THE PURGE VOLUME CONTROL VALVE. If the code returns, test the Purge Volume Control Valve for a Stuck Open condition.2022 Chevy Trax engine light code P1467. Does anyone know what this code could be? My OBD2 scanner says it is Heated Catalyst Comparison Battery Voltage of Power Switches Plausibility. Was able to get live data and Catalyst is reading between 1,400F - 1,500F. Yes I fixed this myself last year. Easy part to replace.These tools include a vacuum gauge, EVAP smoke machine leak checker, hand vacuum pump, car diagnostic scanner and a digital multimeter. ... P0441 - EVAP System Incorrect Purge Flow. P0446 - EVAP ...

Dec 16, 2019 · P0443 indicates a problem with the wiring to/from the purge valve or that the purge valve solenoid has a short/open circuit. It typically won’t affect the way that your Trailblazer runs. You may smell gas. Most commonly caused by a bad purge valve solenoid. Checking the gas cap may just save a lot of time.

Go online and Google "N232395310 Evaporative Emission Purge Pump". It's a letter that was supposed to have been mailed to ALL owners of the affected models. (I never received one). It's a Special Coverage letter directing GM Dealers to replace the Pumps at NO COST (Assuming MDI2 Code P1467). I'll try to attach a copy.Step 2: Look at the Hoses. Start by locating the purge valve solenoid and tracing the lines that connect to it as far as they run. If any of them are cracked, broken, or disconnected, repair them and see if that clears P0441. If you live in a drier climate, or your Blazer is older/has high mileage, cracked hoses can throw P0441.GM has released a new technical service bulletin to dealerships for select units of the 2020 Buick Encore subcompact crossover. In the service bulletin, The General states that 2020 Encore units ...To diagnose the P1467 2022 GMC Sierra code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.So I ordered the EVAP purge valve/control solenoid this one is located on the left side on the engine block. So if you want to do it yourself here is how to do it from the HAYNES REPAIR GUIDE: To remove the EVAP Purge Solenoid Removal 1. Disconnect the electrical connector. 2. Depress the locking tab and remove the hose from the purge valve. 3.Interim owner notification letters informing owner of the safety risk are expected to be mailed July 26, 2021. A second notice will be mailed once remedy parts become available. Owners may contact ...In this video, we're going to take a closer look at DTC P146B, which is a diagnostic trouble code related to the EVAP purge pump system performance in your v...

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The P0441 indicates a problem with the level of fuel vapors in the engine. The EVAP system stores the fuel fumes in the EVAP charcoal canister. While driving, the purge valve releases the fumes into the engine to be burned. If the valve lets too little or too much fuel fumes into the engine, that triggers the P0441 code.Do you know how to drain a waterbed without a pump? Find out how to drain a waterbed without a pump in this article from HowStuffWorks. Advertisement A waterbed is a bed whose matt...Notes: Vapor Canister Purge Solenoid. PRICE: 28.99Connector Gender: FemaleTerminal Gender: MaleTerminal Quantity: 2Vacuum Port Quantity: 1 ... 2021 Chevrolet Trailblazer Sensor - Ambient Air Temperature; Related Makes. Buick Canister Purge Valve; Cadillac Canister Purge Valve;2021 Trailblazer L; 2021 Trailblazer LS; 2021 Trailblazer LT; 2021 Trailblazer RS; ... If P146F is set, relocation of the Evaporative Emission Purge Pump ground needs to be completed. As the concern is very intermittent, vehicle may go weeks and/or hundreds of miles between occurrences. It is advised that the dealer drive the vehicle for a few ...psnyder53. Registered. 2022 TB LT awd 1.3 2020 Tacoma SR5. Joined May 1, 2022. 179 Posts. #21 · Apr 14, 2024. Go to the National Highway Traffic Safety Administration. You can access the letter there. N232395310 is the number on the letter for the coverage.Here are the top 7 reasons for EVAP fault codes: Loose or worn gas cap. Over time, the gasket on the gas cap can become worn and not seal correctly. This can cause an EVAP leak. Check your gas cap and make sure it is tight. EVAP purge valve. The EVAP purge valve is usually located near or on the engine.shbox. 520 posts · Joined 2016. #3 · Jul 6, 2022. 2.0L ? DTC P1467. Evaporative Emission Canister Purge Pump Underspeed. Conditions For Setting The DTC. P1467. Evaporative Emission Canister Purge Pump Speed & Desired EVAP Purge Pump Speed = Not within a calibrated range - For greater than 5 s.138 posts · Joined 2012. #25 · Jan 19, 2020. Pretty sure that the sound is the car conducting an evaporative emissions test. It basically pulls a vacuum on the fuel system and checks to make sure that the vacuum holds. If it doesn't, then it indicates a leak in the system, and you'll get a check engine light.The Engine Control Module monitors the Evaporative Emission Purge Pump, and the Diagnostic Trouble Code (DTC) will be set when the EVAP Purge Pump Speed & Desired EVAP Purge Pump Speed is not within a calibrated range for greater than 5 s. P1467 2022 GMC Sierra Code - EVAP Purge Pump UnderspeedThere are seven critical connections that could likely lead to these DTCs being set: 1. Purge tube to purge valve (at intake manifold) 2. Purge tube to chassis EVAP line (at rear of … ….

You can easily check the purge valve with a hand vacuum pump. Unplug the hose that's on the engine side of the valve and put the hose from the vacuum pump on that nipple. Pump it until the gauge says -28 inches and then stop pumping. Let it sit for 15 minutes and see if the gauge goes down at all. If it loses vacuum, replace it.EVAP Pump Fail. Just learned that General Motors has issued an extended evaporative emission purge pump warranty period for 2021 model year, both engines. GM will extend the warranty coverage on affected vehicles from two years or 24,000 miles (whichever comes first) to a period of 15 years or 150,000 miles (whichever comes first) from the date ...UL7500 pump is UL classified for safety and designed for use in 115-Volt evaporative coolers rated up to 7,500 CFM of air delivery. This pump also features a low-level design to ensure normal operation even if the cooler's water level drops to as low as 1/2 inch. The dual-coil concentric motor pumps 360 GPH at a head height of 1 foot.the roadie. 26436 posts · Joined 2005. #2 · Aug 8, 2010. The air pump is a totally different system than the evap system. The vent solenoid near the fuel tank is item 11, and the purge solenoid on the engine is item 14. Looks like you have a vent solenoid, not a purge. Like.10199281. TSB Date: May 25, 2021. Date Added to File: July 19, 2021. Failing Component: Fuel System, Gasoline:Storage:Evaporative Emissions:Canister. Summary: This service bulletin provides diagnostic tips/steps on testing for possible evap leaks in the system to correct a customer concern of an MIL illuminated with DTCs P0442 and/or P0455 set.The Engine Control Module (ECM) monitors the speed of the purge pump and compares it to the desired speed. If the speeds are not within the calibrated range for more than 5 … Chevrolet Trailblazer Purge Pump. My 2021 Trailblazer has been in the dealership for a week after a check engine light came on, they replaced the turbocharger and the check engine light was still on, they now say it’s the purge pump, that I can come get it and wait til they receive the part, that it won’t damage anything because it’s ... Step 1: Disconnect the vehicle's battery. Locate the vehicle's battery and disconnect the positive and negative battery cables before proceeding. The EVAP canister is attached to an electrical harness. Step 2: Raise the rear of the vehicle. The EVAP emissions control canister is located on the driver side, near the rear tires.In this video we replace the faulty purge valve on a Chevy Trax. From what I've read, this is a common problem on any Chevy with this luj/luv 1.4 liter turbo... Evap purge pump underspeed 2021 trailblazer, GM has released a new technical service bulletin to dealerships for select units of the 2020 Buick Encore subcompact crossover. In the service bulletin, The General states that 2020 Encore units ..., Hello everyone! I'm a new moderator to this forum. I grew up in the automotive business and would like to share my knowledge and experience with you., 5. Equipment Failure. The Chevy Trailblazer has been recalled for several issues, including equipment failure that can cause a fractured jack. In some cases, the emergency jack included with the SUV may not be positioned appropriately. If this happens, it can fracture while in use and cause the vehicle to collapse., This preliminary information communicates information that the evap purge pump may be filling with liquid fuel if the customer overfills the fuel tank by over 3 clicks of a normal filler nozzle. Reference n202324990: special coverage - Discuss it at Forum View This TSB. TSB Number: 21NA124 NHTSA Number: 10199281 TSB Date: May 25, 2021, To diagnose the P10F5 Buick code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour., Page 2 November, 2021 Bulletin No.: 21-NA-149 Involved Region or Country United States, Canada, Mexico, Middle East, Chile, Paraguay, Uruguay, Thailand, Australia and New Zealand. Condition 1 This Condition pertains to vehicles equipped with engine 2.7L, L3B only. Some customers may comment on any of the following concerns: - SES MIL - No Start, GMC TSB 19-NA-148. Some customers may comment on the MIL being illuminated. This condition is not related to a wiring harness issue as outlined in PIT5677. A technician may find one or more of the following DTCs set current or in history: P1467 - EVAP Purge Pump Under Speed. Stable battery voltage is critical during programming., P0443 indicates a problem with the wiring to/from the purge valve or that the purge valve solenoid has a short/open circuit. It typically won't affect the way that your Trailblazer runs. You may smell gas. Most commonly caused by a bad purge valve solenoid. Checking the gas cap may just save a lot of time., Vapor Canister Purge Valve Connector. ... CHEVROLET > 2002 > TRAILBLAZER > 4.2L L6 > Exhaust & Emission > Vapor Canister Purge Valve / Solenoid. Price: Alternate: No parts for vehicles in selected markets. Economy . BWD/NIEHOFF CP214 . Vapor Canister Purge Solenoid [Wholesaler Closeout-- 30 Day Warranty] (Only 1 Remaining) BWD/NIEHOFF CP214., The Engine Control Module (ECM) monitors the speed of the purge pump and compares it to the desired speed. If the speeds are not within the calibrated range for more than 5 …, Vapor Canister Purge Solenoid. EVAP Purge Control Solenoid - Repair or Replace A failed evap purge solenoid in your vehicle's evaporative emissions system will often have no noticeable symptoms beyond a check engine light, but it does cause your 2021 Chevrolet Trailblazer to operate inefficiently and produce higher emissions., The 1.2T (LIH) is almost identical to the 1.3T, just a little smaller with less hp/tq. 1.3T (L3T) Engine Overview. The 1.3T is an advanced, power dense, inline three-cylinder engine, producing 115 hp (86 kW) per liter. It is the built off the new cylinder set strategy (CSS) engine architecture, optimizing efficiency and performance., Pump Assembly, Evap Emis Cnstr Purge for $72.97. All parts are backed by the GM's warranty. ... Evap Emis Cnstr Purge. 2020-2021 GM. Part Description. Pump Assembly, Evap Emis Cnstr Purge. Replaced By. 25207119. ... 2021 Chevrolet Trailblazer: 3 Cyl 1.2L: 4 DOOR EXT:, P2407: Evaporative Emission System Leak Detection Pump Sense Circuit Intermittent/Erratic P0496: Evaporative Emission System High Purge Flow You need to buy a replacement Bosh Purge Valve. Got mine for $75 on Amazon. 2016 Land Rover Discovery Sport HSE The EVAP assembly is located in the rear driver side wheel-well., The best part is, our Chevrolet Trailblazer Vapor Canister Purge Valve products start from as little as $52.99. When it comes to your Chevrolet Trailblazer, you want parts and products from only trusted brands. Here at Advance Auto Parts, we work with only top reliable Vapor Canister Purge Valve product and part brands so you can shop with ..., Certain units of the 2021 Chevy Silverado 1500, 2020 Chevy Blazer, 2021 Chevy Trailblazer and 2021 Chevy Trax may have a condition where the evaporative emission purge pump could fail. If this ..., This extended contract will be offered at the time of sale and the cost, is between $1,000 to $2,000 depending on brand and model, can be rolled into the price of the vehicle and financed. If the ..., 2021 FWD Trailblazer here. Just clocked in over 19k miles a couple weeks ago and then Check Engine light turned on. Error code ‘P1467 - ‘EVAP Purge Pump …, 1370 posts · Joined 2020. #2 · Nov 21, 2021. Most vehicles fall under the lemon law if they've been to the dealership 3x for the same problem or even just excessive repairs. The oil pans and drain plugs are breaking because the techs are trying to tighten them like standard oil drain plugs. The Trailblazer drain plug uses a half turn to lock ..., SUB - Certain 2020-2021 Buick Encore GX and 2021 Chevrolet Trailblazer vehicles may have a condition where the camshaft actuator oil control valve (OCV) center bolt could stick or bind. Read More ..., An active purge pump system module is provided for an evaporative emission control (EVAP) system for a vehicle. The EVAP system includes a fuel tank, a vapor collection canister in communication with the fuel tank, an air intake, and a purge valve connected between the canister and the air intake. The active purge pump system module includes a pump in fluid communication with the canister to ..., Like the P0443 code, the P0444 code (EVAP Purge Control Valve Circuit Open) and P0445 code (EVAP Purge Control Valve Circuit Shorted) also relate to the purge control valve. Examples of other diagnostic trouble codes pertaining to the EVAP system include P0440-P0449, P0452-P0453, and P0455-P0456., What is a pump track and the best pump tracks in the US like Velosolutions, Ray’s, Piney, Griffin in NY, Ohio, California, Colorado, Washington. If you ever played the video game E..., N232395300 Evaporative Emissions Purge Valve Page 3 of 3 July 2023 This notice applies to your vehicle, VIN: _____ Dear General Motors Customer: As the owner of a 2019 model year Buick Enclave or Chevrolet Traverse, or 2020 model year Buick Encore, Chevrolet Sonic or Trax vehicle, your satisfaction with our product is very important to us. ..., 2021 Trailblazer L; 2021 Trailblazer LS; 2021 Trailblazer LT; 2021 Trailblazer RS; ... If P146F is set, relocation of the Evaporative Emission Purge Pump ground needs to be completed. As the concern is very intermittent, vehicle may go weeks and/or hundreds of miles between occurrences. It is advised that the dealer drive the …, #gmtech #chevytrucks #foryou #foryoupage #foryoupage #fyp #viral_video #viralvideo #viral #viraltiktok #mechanicsoftiktok #mechaniclife #mechanic #chevy #sti..., There is a Special Coverage for the 2020 XT5 and the Evaporative Emission Purge Pump. 15 years or 150,000 miles (240,000 km) Also included is the 2020 CT4 and CT5 and other GM vehicles. N232395310 Evaporative Emission Purge Pump. Condition Certain vehicles may have a condition that could cause the evaporative emissions …, The most common thing you'll notice from a bad vapor canister purge valve is that you'll get a check engine light that you weren't expecting. While the symptoms can change depending on whether or not the valve is stuck open or closed, one thing that shouldn't change is that you should get a check engine light. 2., Hello. I just purchased a used 2021 XT4 yesterday. I drove it home, then this morning, the check engine light came on. I scanned the code and found a P1467 - (Evap Purge Pump Underspeed) I have to take back to the place I purchased it from, which is not a Cadillac dealer., The Engine Control Module (ECM) monitors the speed of the purge pump and compares it to the desired speed. If the speeds are not within the calibrated range for more than 5 seconds, the P1467 code will be triggered. This code indicates a malfunction with the EVAP Purge Pump., , 2021 Chevrolet Trailblazer Canister Purge Valve. Buy Online. Pick Up In-Store. Brand. ACDelco (1) Duralast (1) Price. Set custom price range: to. $25 - $30 (1) ... 2021 Chevrolet Trailblazer Sensor - Ambient Air Temperature; Related Makes. Buick Canister Purge Valve; Cadillac Canister Purge Valve;, • P1467: EVAP Purge Pump Under Speed Cause The cause of the condition may be a software anomaly. Correction Note: Stable battery voltage is critical during programming. Any fluctuation, spiking, over voltage or loss of voltage will interrupt programming. Install a GM Authorized Programming Support Tool to maintain system voltage.