I own a Chevrolet, Impala - 2002. In the beginning of April I was on my way to work and when I attempted to pull out into a busy four-lane highway as I hit the gas pedal to accelerate the car felt sluggish as though it were not getting enough gas or not shifting into gear. That evening I stooped to fill up the gas tank and upon leaving I was climbing a hill and the car acted up again and made a different sound and again acted as though it were not shifting into gear or not getting enough fuel and the security light (not service engine) came on and stayed on. I immediately phoned my husband and he made arrangements to take it to the dealership (john serretti). We have maintained this vehicle faithfully since we purchased it oil changes, tires rotated etc. All performed at john seretti's every 3/4 months. After reviewing all paperwork received at home for the Impala my husband came across a letter from General Motors mailed in October 2005 stating that some vehicles were experiencing loss of power due to the catalytic converter and if we did indeed have any issues with this to take to the dealer and they would replace it, but if not, nothing needed to be done and this letter was not a recall. The dealer performed a diagnostic test ($90) and found that indeed the catalytic converted was clogged and supposedly caused the spark plugs wire to arc and melt which all had to be replaced at our expense (almost $600). My husband has talked to several mechanics in reference to this and they all agree this could have been a potentially dangerous situation possibly causing the vehicle to catch on fire. GM did cover part of the repairs but in my opinion they should have covered them all because the converter was defective and if carbon had built up to that extent to cause all of this damage and leading me and other mechanics to believe it could very well have started a fire, why wasn't it discovered at the previous inspection-oil change?

- Aliquippa, PA, USA