Faults:
Only two things so far. The first thing is after we owned the car for about 6 months, it would run very rough sometimes. Upon acceleration, it would hesitate, lurch, or even cut off (happened twice). I decided to try fuel injector cleaner, and it worked to fix the problem like charm. I even used a cleaner that was good for 3000 miles and after that, it started acting up again. Then I use more fuel injector cleaner, and it straightens up again. All I can think of is the fuel injectors are very sensitive to gas additives.
Second thing is something is going on with the heater. When using a/c, the flow of air from the dash is fine. When switched to heat, the force of air goes down considerably now, different from last year. The dealer states everything is fine, but I know better as it did not have this problem last year. Has anyone other TB owners had this problem? I communicated with an Internet Chevy service technician, who says it is the "air flow door that is not sealing properly". Of course, the dealer says everything is just peachy. Yeah, right. Funny what they can find when the warranty is up.
22nd Aug 2007, 11:43
GM suggests 'top-tier' gas stations because their fuel injectors are sensitive to clogging and need extra detergent. Around here that means Shell, but there are others on the list. Just google 'top-tier gas'. Or use Chevron Techron in the tank periodically. I had the same problem with my Trailblazer and Express until I started using Shell gas.