2004 GMC Sierra 2500 electrical system problems

48 owner complaints filed with NHTSA name the electrical system on the 2004 GMC Sierra 2500 — 34% of all complaints for this model year.

Electrical System complaints

34%

share of all complaints

56,000 mi

median reported incident mileage

0 / 3

crash / fire reports

What owners report

“The instrument panel cluster gauges don't always work. We were on freeway when we noticed speedometer had failed as well as fuel gauge , temp gauge all gauges inoperative. This is third time cluster panel is being replaced; first two under warranty third time we had to pay $204.”
filed Sep 23, 2017
“My vehicle had brake lines replace two times with less than 65,000 miles because breaks stop working. Fuel line replaced under 55,000 miles because it made check engine light come on speedometer erratic,oil pressure gauge high and low,fuel gauge erratic under 65,000 miles. Loud noise from engine…”
filed Feb 10, 2017

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
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