3TT — Rear tires: 8.75-16.5 E Tbls Highway Poly B/W. This code identifies the factory tire specification, application, or spare-wheel equipment. Browse RPO codes →
I am organizing the original options on a recently purchased 2018 Chevrolet Traverse. Code 3TT appears in the list with the description “Rear tires: 8.75-16.5 E Tbls Highway Poly B/W. This code identifies the factory tire specification, application, or spare-wheel equipment” Is that wording complete, or is there usually more equipment associated with the code?
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Before buying, I would inspect the relevant component and take a photo of its label or part number. That often resolves whether the vehicle still has the factory configuration associated with 3TT.
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For a retrofit, check the modules, wiring connectors, software configuration, and compatible part numbers first. Installing the visible component alone may not make the feature operational.
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If you are documenting the vehicle, save both the original wording and the readable explanation. That preserves the factory terminology while making the record understandable later.
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The dealer should be able to pull a VIN-specific equipment or parts record. Ask them to search by VIN rather than entering only the three-character code.
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If you are documenting the vehicle, save both the original wording and the readable explanation. That preserves the factory terminology while making the record understandable later.
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