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Wi | Tier 3 and Tier 4 is off toad talk. On road light duty diesels are currently in their Tier 2 phase. Tier 3 is down the road.
Pickups over 8500gvwr fall into Heavy Duty ratings like semis have. These are simply referred to as EPA98,EPA04,EPA07, EPA10 and so on.
DEF sensors go bad in everything but its odd you would have so many failures in such a short time. Might want yo make sure the dealer is doing things right not just throwing parts. | |
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Chevy duramax down on 4th bad def sensor !!!
