In this indict I"ll show you just how to test the EVAP purge solenoid top top the 1999-2003 V8 equipped Chevrolet Silverado (Suburban, Tahoe) and also GMC Sierra (Yukon, Yukon XL).

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All that the test procedures are defined in a step-by-step way. You"ll easily discover out if the EVAP purge solenoid is poor or not.

you can discover this indict in Spanish here: Cómo Probar El Solenoide De Purga EVAP (1999-2003 V8 Silverado, Sierra, Suburban, Tahoe, Yukon) (at: autotecnico-online.com).

APPLIES TO: This tutorial applies to the adhering to vehicles:


Silverado (1500, 2500):4.8L, 5.3L: 1999, 2000, 2001, 2002, 2003Silverado (2500):6.0L: 1999, 2000, 2001, 2002, 2003Suburban (1500):5.3L: 1999, 2000, 2001, 2002, 2003Suburban (2500):6.0L: 1999, 2000, 2001, 2002, 2003Tahoe:4.8L, 5.3L: 2000, 2001, 2002, 2003


Sierra (1500, 2500):4.8L, 5.3L: 1999, 2000, 2001, 2002, 2003Sierra (2500):6.0L: 1999, 2000, 2001, 2002, 2003Yukon:4.8L, 5.3L: 2000, 2001, 2002, 2003Yukon XL (1500):5.3L: 1999, 2000, 2001, 2002, 2003Yukon XL (2500):6.0L: 1999, 2000, 2001, 2002, 2003


The following tutorial will assist you check the EVAP vent solenoid:

Symptoms of A negative EVAP Purge Solenoid

The canister purge solenoid is an emissions manage component the the evaporative emissions (EVAP) system of her V8 fitted Chevrolet Silverado (GMC Sierra).

The purpose of the EVAP mechanism is to minimize the evaporative emissions air pollution that is developed by the fuel vapors released by the gasoline stored in the fuel tank.

The EVAP device does this by trapping and then recirculating this fuel vapor into the engine (so that it have the right to be used as fuel). This stays clear of the fuel vapor from gift released into the air (environment).

The ingredient responsible because that "purging" the fuel vapor in the EVAP system into the engine (to be supplied as fuel) is the EVAP purge solenoid.

How? it does so by acting together the switch that allows the fuel vapor save in the EVAP carbon canister into the engine.

To it is in a bit more specific, the EVAP purge solenoid is in an turn off state many of the time. In this off state, the EVAP purge solenoid stays clear of fuel vapor stored in the EVAP carbon canister native entering the input manifold.

When the fuel injection computer commands the EVAP purge solenoid ON, the opens and also lets the fuel vapors save on computer in the EVAP carbon canister into the input manifold.

When the EVAP purge solenoid fails, it"ll commonly not have the ability to open and permit the fuel vapor to go into the input manifold (when commanded ON through the fuel injection computer).

A poor EVAP purge solenoid generally doesn"t cause any kind of engine performance difficulties or drive-ability issues.

Generally you"ll only see one or much more of the complying with symptoms:

The check engine light will certainly be illuminated by among the following trouble codes:P0443: EVAP mechanism Purge manage Valve Circuit Malfunction.Pressure in the gas tank when you eliminate the gas tank cap.Your Silverado (Sierra) fails the emissions test.Difficulty pour it until it is full up the gas tank with fuel.

You can uncover a an ext detailed explanation the the P0443 EVAP purge solenoid trouble code here:

Where come Buy The EVAP Purge Solenoid

The AC-Delco brand is the original equipment (O.E.) component for her Chevrolet Silverado (GMC Sierra). Dorman is an additional trusted brand.

The following links will aid you compare shop for the EVAP purge solenoid:

What Tools perform I Need?

To check the EVAP purge solenoid, you"ll need:

A multimeter.Two jumper wires v insulated alligator clips.

The insulated alligator clips will assist you protect against shorting the jumper wires together when connecting them to the masculine spade terminal the the EVAP purge solenoid once bench-testing it.

You"ll require hand devices to remove the EVAP purge solenoid from its ar underneath your Chevrolet Silverado (GMC Sierra).

TEST 1: Making certain That The EVAP Purge Solenoid Is obtaining Power

For our first test, we"re gonna" make certain that the EVAP purge solenoid is obtaining 10 to 12 Volts.

The cable that supplies this voltage is the pink (PNK) cable of the 2-wire connector.

In the picture above, the woman terminal labeled with the letter A is the one the connects come the PNK wire.

OK, let"s start:

With the red multimeter check lead, tenderness probe the terminal labeled with the letter A.Terminal A is the one that connects to the PNK wire.

The multimeter must register 10 to 12 Volts.

Let"s take it a look at what your test outcomes mean:

CASE 1: 10 to 12 Volts DC are present. This is the correct and expected test result.

The following step is to walk to: test 2: Making certain The EVAP Solenoid Is prevent Fuel Vapor Intake.

CASE 2: The suggested voltage is no present. There is no power, the EVAP purge solenoid will certainly not function.

This is usually caused by one of two things:

The ENG 1 (1999-2002) or the PCM 1 (2003) fuse is blown in the underhood fuse box.There"s one open-circuit difficulty in the wiring between the EVAP purge solenoid"s connector and the underhood fuse box.

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Your following step is to inspect the fuse and also retest for the presence of 10 come 12 Volts in terminal A.