Two problems related to gas recirculation valve (egr valve) have been reported for the 2007 Chevrolet Suburban. The most recently reported issues are listed below.
I bought this Suburban used in 2010 with about 32,000 miles on the odometer. I am the 2nd owner. From the day I bought it, it has burned oil. The add oil light comes on half way through a oil change. It's my 3rd Suburban. Neither of those two had ever burned oil. It was still under factory warranty, so I took it to courtesy Chevrolet in phoenix. They put it on a oil watch. I had to bring the truck back in every thousand miles so they could check the burn rate. They always said it was normal per chevy burn rates. Really? check the internet for 2007 Chevrolet engine oil, high burn rates and you will see that mine is not the only engine that burns oil. It sounds like Chevrolet knew there was a problem, and instead of fixing the problem with integrity, they changed their burn rates so they wouldn't have to. I have lost all faith in Chevrolet. I will never buy another Chevrolet product.
In oct. 2007 I purchased a brand new 2007 Chevrolet Suburban from gordon Chevrolet in tampa florida, it had 20 miles on it. On December 9th 2008 while on my way home from work, at approximately 12:45 am, it exploded and was engulfed in flames. I received 2nd and 3rd degree burns and waited on the side of the road for close to 30 minutes for help to arrive. The Suburban had absolutely no aftermarket changes or any type of modifications done to it. All of its servicing and repair work was done at cox Chevrolet in bradenton florida, a general motors dealership. The truck had just over 35,000 miles on it and is now just a burnt out shell. During the 1 year and 2 months I owned it, I had several problems with it and took it to the servicing dealership for all the problems. My attorney and my insurance agent think it was a defect in the manufacturing or a defect in the repair. An official cause has yet to be determined and because of gm's going bankrupt they are not interested.