fuel

Charcoal Canister

for 2007 Ram 3500 5.9L I6 Cummins · 4WD

Difficulty

Easy

Time

54 min

Tools

Steps

🔍Draft — verification in progress. This procedure was built from OLP's spec database on August 20, 2026 and is queued for line-by-line review by Chris Hackleman — master technicians with 20+ years each. That review typically completes within 3 days of generation, and this banner changes to a verified badge the moment it does. Until then, cross-check every torque value and fluid capacity against the factory manual, and stop if anything looks unsafe. If something looks off, report it below — a real person reads every report.

This procedure covers the removal and replacement of the evaporative emissions (EVAP) charcoal canister on a 2007 Ram 3500 with 5.9L Cummins diesel engine.

Warnings

⚠Work in a well-ventilated area as fuel vapors may be present in the EVAP system

⚠Do not smoke or have open flames near the work area

ℹ️The charcoal canister is located on the driver side frame rail behind the fuel tank

Tools required

10mm socket and ratchetEssential

Flathead screwdriverEssential

PliersEssential

Jack and jack stands

Wheel chocksEssential

Safety glassesEssential

As an Amazon Associate and Autel/ANCEL partner, OLP earns from qualifying purchases — how we link. This never changes the specs we publish.

Parts

EVAP charcoal canister × 1 — Use OEM specification
Vapor line quick-connect fittings (if damaged) × 1 — Use OEM specification

As an Amazon Associate and Autel/ANCEL partner, OLP earns from qualifying purchases — how we link. This never changes the specs we publish.

Preparation

Park vehicle on level ground and engage parking brake
Place wheel chocks behind rear wheels
Allow vehicle to cool if recently driven
Raise driver side of vehicle if additional clearance is needed for access

Procedure

1
Locate the charcoal canister
Position yourself under the driver side of the vehicle. The EVAP charcoal canister is mounted to the frame rail behind the fuel tank, forward of the rear axle. It is a black cylindrical or rectangular plastic component with multiple vapor lines connected to it.
2
Disconnect vapor lines from canister
Identify all vapor lines connected to the canister (typically 3-4 lines). These use push-to-connect quick-disconnect fittings. Press the release tab on each fitting while pulling the line away from the canister. If tabs are difficult to release, use a small flathead screwdriver to depress the locking tab while pulling the line. Note the position and routing of each line for reinstallation.
3
Disconnect electrical connector
Locate the electrical connector for the canister vent solenoid valve on top of the canister. Press the release tab on the connector and pull it straight off the solenoid. If connector is stuck, gently wiggle while pulling to avoid breaking the locking tab.
4
Remove canister mounting bolts
Remove the two 10mm bolts securing the canister bracket to the frame rail. Support the canister with one hand while removing the second bolt to prevent it from falling.
5
Remove canister from vehicle
Lower the canister and bracket assembly down and away from the frame rail. Maneuver it out from between the frame and fuel tank. The canister may be tight against the tank, so angle it as needed to clear the fuel tank shield.
6
Inspect vapor lines and fittings
Examine all vapor line quick-connect fittings for cracks, damage, or broken locking tabs. Check vapor lines for cracks, kinks, or deterioration. Replace any damaged components. Inspect the canister vent filter if accessible to ensure it is not clogged with debris.
7
Install new charcoal canister
Position the new canister and bracket assembly up into the mounting location on the frame rail. Align the mounting holes in the bracket with the threaded holes in the frame. Start both 10mm mounting bolts by hand to ensure proper thread engagement.
8
Tighten mounting bolts
Tighten both 10mm mounting bolts securely. Alternate between bolts to ensure even clamping pressure. Bolts should be snug but do not over-torque as you are threading into frame metal.
9
Reconnect vapor lines
Push each vapor line firmly into its corresponding port on the canister until you hear or feel a distinct click, indicating the locking tab has engaged. Gently tug on each line to verify it is fully locked. Ensure lines are routed as originally positioned and are not kinked or stretched.
10
Reconnect electrical connector
Push the electrical connector onto the canister vent solenoid valve until it clicks into place. Verify the locking tab is fully engaged by gently pulling on the connector.

Reassembly

Double-check that all vapor lines are securely connected and properly routed
Verify electrical connector is fully seated with locking tab engaged
Confirm mounting bolts are tight and canister is secure to frame
Lower vehicle if raised

Verification

Start the engine and allow it to idle for several minutes
Check for fuel vapor odors around the canister area indicating a loose connection
Use a scan tool to verify no EVAP system trouble codes are present
Perform an EVAP system monitor drive cycle if codes were previously present: drive at highway speeds for 10 minutes, then idle for 2 minutes
Visually inspect all connections one final time with engine running to ensure no vapor leaks

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