p0496
Moderate
GMC · SUVs
Evaporative Emission Control System High Purge Flow
Quick Answer
Error code P0496 on your GMC SUVs means: Evaporative Emission Control System High Purge Flow. This is usually fixable — see the step-by-step guide below.
Affected Models
Likely Causes
How to Fix It
1
Inspect purge valve operation
2
Check all EVAP hoses for cracks
3
Test purge solenoid resistance
4
Verify canister integrity
5
Replace purge valve if faulty
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
Parts You May Need
Purge control valve
EVAP hoses
Charcoal canister
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