pretty bad
Typical Repair Cost:
No data
Average Mileage:
46,900 miles
Total Complaints:
1 complaints

Most common solutions:

  1. not sure (1 reports)
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This problem may be covered under warranty. Ask your GMC dealer.

problem #1

Feb 052015

Sierra 2500 SLE 6.6L Diesel

  • Automatic transmission
  • 46,866 miles

I have several nox sensor codes and have had both sensors replaced on a truck with less then 50,000 miles on it. Any ideas on what keeps causing this?

- Chris M., Hackettstown, NJ, US