2004 Cadillac CTS electrical system problems

34 owner complaints filed with NHTSA name the electrical system on the 2004 Cadillac CTS — 15% of all complaints for this model year.

Electrical System complaints

15%

share of all complaints

91,438 mi

median reported incident mileage

0 / 0

crash / fire reports

What owners report

“The contact owns a 2004 Cadillac CTS. The contact stated that after parking the vehicle, the vehicle would not restart. The contact stated that the ignition failure required her to contact roadside assistance to jump start the battery. The contact stated no warning light was illuminated. The…”
filed Apr 20, 2022
“On may 18th, 2018 I purchased a 2004 cadillac cts from top notch auto. The gas gauge, brakes, a/c, blinkers dash buttons all were not working. He said to bring it the next day and they would fix it all. I ran out of gas getting there the next day due to not having a working gas gauge. I spent the…”
filed Jul 9, 2018

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

This service bulletin provides information for dealers/technicians on OnStar Module 2G Sunset Information.
23-NA-001 · Service Bulletin/Repair Instructions · issued Mar 28, 2025
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