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We Service and Repair Most GMC Cars and Trucks

2012 GMC Sierra


GMC Sierra

Service Date
Services Performed
  • Scanned PCM and found code stored for DEF reservoir heater fault. Inspected wiring and connectors for faults and found none. Tested resistance of DEF reservoir heater and found resistance out of specification, confirming faulty heater. Removed DEF tank and found rotten tank straps. Replaced DEF heater assembly, associated gaskets/seals and tank straps. Cleared codes and performed stationary regeneration of exhaust system. Road tested vehicle while monitoring exhaust data and found no faults, no codes returned.
Alan H. gave our service a 5 star review on 8/7/2023
2012 GMC Sierra 2023-08-09T22:00:44+00:00