2006 Hummer H3 misfire / rough idle reports

23 NHTSA complaints describe misfiring cylinders or rough idling on the 2006 Hummer H3 — roughly 6% of all complaints for this model year.

Symptom counts come from keyword analysis of complaint narratives. One complaint can describe several symptoms, and classification is approximate — read the underlying reports on the full 2006 Hummer H3 report before drawing conclusions.