One problem related to engine belts and pulleys has been reported for the 2008 Chevrolet Impala. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2008 Chevrolet Impala based on all problems reported for the 2008 Impala.
I was driving through a low area in the street that had a puddle of water to drive through. I was going to turn right and the steering wheel would not turn and then all at once it did turn. I did not have any more water to run through until about a month later in a hard rain and it did it again. This was also when I wanted to make a right turn. This all happened in lakeland FL. I contacted bill heard Chevrolet in plant city FL and made an appointment. They checked it out and said they could not make it do that but they ordered parts ( a new belt) and installed a few days later. Another rain storm and it did the same thing only this time the instrument panel lights all come on for about a 1/2 minute. I reported this to the dealer and they said bring it back in a they would check out and replace the tensioner. I was driving back to michigan and I was at the georgia and tennessee state line in a rainstorm and it locked up again. I contacted cliff anschuetz in alpena mi and made an appointment with them. They checked it out, put water on the belt but said they could not make it happen. Another service rep said he would take a look at it and put on a new belt and tensioner and they did. The belt always squeals when you first start up in the morning. It still does that and I have no doubt the power steering will lock up when it rains. First incident date was sometime in March and to date. This is a very dangerous problem.