When setting at idle, there's vibration, rough idle, and slight engine surge. Vibration can be felt in steering wheel, brake pedal, and in seat. Dealer response: Engine not misfiring and fuel mixture is correct. No clues found. Engine is running normal at this time. Concern not verified. No repair attempted.

- Mobile, AL, USA

Vehicle was purchased 1 year ago and continues to stall. It stalls at high speeds. Has taken it to the dealer, he says it is a fuel pump issue, they have replaced the fuel pump, and the problem is still there. Chevrolet says this effects vehicles above 5000 feet. And on hot days. Consumer lives at 6000 feet and vehicle does stall at high speeds.

- Colorado Springs, CO, USA

New 2004 Chevrolet Avalanche purchased 08/14/04. On 09/24/04, vehicle stopped on freeway. Towed to dealership purchased from, winter Chevrolet in pittsburgh, ca. Kept for 11 days without information given verbally or in the mail. Continue to have problems. Truck again stopped on freeway on 12/27/04. Re-started after turning off and waiting a couple minutes. Taking back in tomorrow. Sales department will not return call regarding trade or return of down. Simply patch up the new vehicle and send me out again awaiting next problem.

- Anticoh, CA, USA