2004 Pontiac Bonneville Problems
RepairPal has identified the most common problems with the 2004 Pontiac Bonneville based on complaints from actual vehicle owners. We'll tell you what the problem is and what it'll take to fix it.
An intake manifold vacuum leak can develop from a variety of sources, often causing illumination of the Check Engine Light with codes P0171 & P0174 stored. Thorough diagnoses will be necessary to pinpoint the cause in order to make the correct repairs. A "smoke" machine is often used to isolate the cause of difficult to find vacuum leaks.
The high pressure power steering hose will commonly leak fluid; it should be replaced.
The front struts may show signs of wear, or be excessively bouncy ride at freeway speeds. This may begin to occur at around 75,000 miles.
The steering may develop a clunk type noise from the upper intermediate steering shaft. Our technicians tell us that you should check with you local GM dealer to find out what the latest repair is for this condition.