Having a EVAP service code (CEL=check engine light) being thrown? Check the evap rubber hoses. Start with the middle hose on the evap canister located under the left side of the truck and just in front of the drivers side rear axle.
Codes that can be caused by this hose leak; PO442 (Medium Leak), PO455 (Large Leak) & PO456 (Small Leak)
Why check here
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