P3400 Diagnostic Trouble Code Discussion for July 2019
Cylinder Deactivation System Performance
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| Help Request | Posted | |
| 2010 GMC Yukon Denali 6.2L MIL Lamp on VIN: 1GKUCEEF9A P3400: Cylinder deactivate. Has anyone come across this code p3400 ( cylinder deactivate |
July 05, 2019 |
