Exhaust vibrates at 1200 RPM to 1400 RPM. The whole truck moans and vibrates. I would think the vibration in time will cause premature failure in exhaust system.
2007 Chevrolet Silverado 1500 engine complaints
Page 4 of 4: complaints 71 to 75 of 75, newest first, as owners wrote them.
Engine suddenly loses power at highway and passing speeds with no warning at all.
2007 chevrolet silverado 5.3l v-8 engine with active fuel management and throttle by wire. Vehicle will not idle down properly or slow down properly or timely. I believe 2 possible causes, active fuel management system trying to maintain "sail speed" in a fuel saving mode and/or throttle position sensor does not know where the drivers foot is. Vehicle performs like the cruise control is on at all times, will ultimately slow down after excessive amount of time. Low speed operation is especially problematic brakes are critical in controlling engine speed and obviously vehicle speed. With foot off accelerator vehicle will maintain 10 MPH speed in parking lot, will travel up hill for aprox. 30 to 50 feet before beginning to decelerate. Throttle response is extremely delayed and transmission shift points are confused at times. At times I place vehicle in neutral going down hill to get engine out of sustained v-4 fuel saving mode so I can better control downhill speed. Dealer contacted and vehicle inspected, I was informed that is the way the system operates and can not be adjusted. Also told that california emissions standards prohibit complete engine idle down because sudden idle down will generate unburned fuel. I was told that the maintained speed was the "sail speed" and that was just the way it is designed to operate. Vehicle performance is not confident or precise, driver must be constantly aware of unintentional acceleration via sustained speed and lack of deceleration when wanted.
Tl* -the contact was driving a 2005 dodge durango at about 5 MPH when a stick knocked off the serpentine belt. The contact said that he then lost power to brakes and steering as a result. The contact called the manufacturer and the dealer. The belt was replaced under warranty, but they said that there was no change that could be made to the truck to prevent this problem from recurring. *ak the consumer discovered the serpentine belt had been pulled from the engine by a small stick. The consumer discovered that then engine sits 10 inches back which allows road debris to enter. Updated 02/22/07.
Tl*-the contact stated that he was driving at about 5 MPH, when a stick knocked off the serpentine belt. The contact said he then lost power to his break and power steering as a result. The contact called the manufacturer and the dealer (ayers chevrolet). The belt was replaced under warranty but they said that there was no change that could be made to the truck to prevent this problem from reoccuring.
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