2004 Chevrolet Impala electrical system problems

681 owner complaints filed with NHTSA name the electrical system on the 2004 Chevrolet Impala — 64% of all complaints for this model year.

681

Electrical System complaints

64%

share of all complaints

70,000 mi

median reported incident mileage

8 / 8

crash / fire reports

What owners report

“Cars acceleration causes me to be unable to pick up speed it decelerates up hills small or latg ramps cats constantly fly pass to avoid a multi car pile up it’s very dangerous!”
filed Nov 29, 2025
“The contact owns a 2004 Chevrolet Impala. The contact stated that while driving approximately 40 MPH, the vehicle suddenly decelerated to approximately 20 MPH, and the instrument panel went black. The contact stated that the vehicle lost power steering functionality, and then lost motive power and…”
filed Sep 5, 2025
“The contact owned a 2004 Chevrolet Impala. The contact received notification of NHTSA Campaign Number: 14V400000 (Electrical System) and would like to be removed from the recall distribution list. The local dealer and manufacturer were not contacted.”
filed Jul 31, 2024

Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.

This Preliminary Information communicates to the dealer the process for downloading or updating operating software for the Tire Pressure Monitor, Active Fuel Injector tester, multi media tester, PICO Scope, GR8…
PIP4723J · Service Bulletin/Repair Instructions · issued Oct 25, 2024
Vehicle Wide Programming (VWP) is a new process to update software on GM Vehicles. It provides the ability via a single selection within Techline Connect to first identify which modules need updating and then proceed to…
General Communication · Service Campaign · issued Aug 26, 2024