The National Highway Traffic and Safety Administration has begun an investigation on Chevrolet Trailblazers from the 2006 and 2007 model years following complaints on the SUVs' driver's side master power window switch. The problem is similar to one on Toyota RAV4s that was reported on last week.

So far, the NHTSA has received 12 consumer complaints on 2006-2007 Trailblazers about melting or burning of the driver's side power window switch. Many of the complaints say the problem led to burning plastic door panels, fires occurring while the vehicle was in operation, or when the vehicle was unattended.

It's unclear whether 2006-2007 GMC Envoys will eventually be included in this investigation, but we found a couple similar complaints for GMC Envoy owners from the same model years.

Source: NHTSA