Six problems related to manifold/header/muffler/tail pipe have been reported for the 2004 Chevrolet Trailblazer. The most recently reported issues are listed below.
Cracked exhaust manifold.
The contact owns a 2004 Chevrolet Trailblazer. The contact stated that an abnormal noise was coming from the rear of the vehicle. The vehicle was taken to an independent mechanic where it was diagnosed that the exhaust manifold was fractured and needed to be replaced. The vehicle was not repaired. The manufacturer was not made aware of the failure. The failure mileage was 78,000. The VIN was not available.
I have had my trail blazer for 1 yr and 1 month. In that time I have had to replace front and back pads and rotors, ball joints, catalytic (sp) converter, and now they just told me I have to replace the head gasket on the manifold. What the hell is going on with this vehicle. I no longer feel safe driving it. The other day the radio just stopped playing and then the service 4 wheel drive light came on.
01/27/04,09/28/05,11/18/05 took vehicle in for service engine soon lights, 04/26/06 took vehicle in for metallic rattle sound suspecting heat shield on exhaust manifold. Dealership stated front backing plates were contacting steering knuckle. 04/21/06 began drive from okc, ok to vanouver, washington, midtrip noted same noise. On trip noise became extremely louder. Stopped at cheyenne wy dealership couldn't get appt for several days. Husband removed heat shield in evanston wy on 8/23 and discovered cracked exhaust manifold. 41000 miles on vehicle. 2 dealerships in evanston wy would not touch us for several days. Contacted gm customer assistance who contacted dealership in slc,ut who would look at vehicle. Drove there but because over 36k, warranty did not cover and they would not fix vehicle under warranty and could not fix same day. Contacted dealership in vancouver wa upon return and they are trying to repair but have now discovered 3 cracked head bolts in addition to cracked manifold. Refusing to cover under warranty even though in for previously. Have admitted to not addressing heat shield at all in April. Extreme stress, inconvenienced and worry on vacation. No eta on repairs. Have requested all parts to be retained for investigation.
On 5 separate occasions, the engine on my 2004 Trailblazer has stalled while in traffic. 1 time, the engine stalled when I applied the brakes; every other time, the engine stalls while at idle. I have taken it into the dealership repeatedly, and they have been unable to duplicate but not fix the problem. They have replaced the manifold pressure valve and cleaned the throttle plates, but the problem still persists.
Spark knock noise on passenger side of car ,not in the engine along side of car, been to dealer 5 times they told me its normal noise and to get over it !! poor gas mialage dealer told me that its normal, the sticker says 15 mpg I am getting 10 to 11, again get over it. . . Can you help please !!!.