1st Generation (2009—2010) H3T Problems

H3T owners with a 2009—2010 model year have the most problems with the cooling system (50%), electrical (50%), and the We've listed some of the most recent complaints below. The full list is available on CarComplaints.com.

  1. Transmission Fluid Mixing With Engine Coolant 1 complaints at an average of 336 miles in the 2009 Hummer H3T.
  2. Automatic Locks Not Working Properly 1 complaints at an average of 65,000 miles in the 2009 Hummer H3T.

What H3T Year is Most Reliable?

Generations are a good baseline for prediciting reliability, but there will almost always be year-to-year differences. We've calculated a reliability score for each model year within this generation, but we've based that score on how the model year compares to all Hummer model years.

Watch out for the 2009 model year which has the highest PainRank™ score in this generation.

Year Complaints Recalls TSBs PainRank (?)
2010 0 0 0 0.0
2009 2 0 0 3.74

Watch out for these common problems

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