Two problems related to battery have been reported for the 2004 Chevrolet Impala. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2004 Chevrolet Impala based on all problems reported for the 2004 Impala.
The speedometer of my 2004 chevy Impala goes out. While driving down the road it will start climbing even though my speed has not changed. I may be going 40 mph but the speedometer reads 120 mph! the gas gauge will also read wrong and my temp gauge just plain doesn't work. This has been going on for over 2 years now. Gm says it's not a recall issue. It can be corrected for awhile if we disconnect and reconnect the battery, but the fix is short lived. We have not yet had it repaired, the cost is over $400. We plan on having it fixed soon. I constantly feel unsafe driving this car when the speedometer malfunctions. I feel gm should be responsible for the cost of repair.
On oct 6th 2005, while driving the department issued 2004 Chevrolet Impala, police patrol squad car, I noticed a unfamiluar very strong foul odor when I would turn on the heater. Unknown to me at the time, but after I sufferred initially an inhalation injury which nearly killed me by sufficating me causing my blood pressure to escalate thereby causing me to suffer duel anyursm' of the upper thoracic vein and the abdominal vein. I was flown via flight-for-life helicopter to a trauma center, hospitalized in intensive care, left incapacited me for four months and without an income. I am now left with internal scar tissue on my aorta vein. My police supervisor visited me in intensive care in the hospital and informed me that the mechanic from the dealership which services our fleet of leased vehicle, inspection results indicated that the electrical system was overcharging the battery and as a result the battery began to overheat giving off battery acid fumes which explained the foul odor.