p0496
Moderate
GMC · Trucks
EVAP High Purge Flow
Quick Answer
Error code P0496 on your GMC Trucks means: EVAP High Purge Flow. This is usually fixable — see the step-by-step guide below.
Affected Models
Likely Causes
How to Fix It
1
Perform EVAP system smoke test
2
Inspect purge control solenoid
3
Check for vacuum leaks in EVAP lines
4
Test purge valve operation
5
Clear code and verify repair
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 solenoid
Vacuum hose kit
EVAP charcoal canister
Purge valve
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