2001 GMC Sierra C3 Problems

RepairPal has identified the most common problems with the 2001 GMC Sierra C3 as reported by actual vehicle owners. We'll tell you what the problem is and what it'll take to fix it.

Refine by vehicle
×
Choose your vehicle
3
Known Problems

The headlight switch used on the GMC Sierra C3 is known to fail through normal operation. Since the headlight switch is also integrated into the interior lights, a malfunctioning switch can cause issues with interior lights as well.

  • Symptoms of a failed headlight switch include:
  • Headlights and taillights failing to turn on or off
  • Interior lights flicker, or fail to turn on or off
  • Gauge cluster lighting off or flickering with headlights on
  • Parking light malfunctions  

This issue is well known with General Motors Trucks and SUVs, and is solved by testing and, if needed, replacing the headlight/dimmer switch. Bad grounding wires at the tail-lights, and dirty/corroded tow package wires can also lead to some of these issues. 

Our technicians recommend replacing spark plugs at 80,000 miles. At the same time, the spark plug wires should be checked and if any hot spots are found, the ignition wire set should also be replaced. On the V8 engines, our technicians recommend having the coil packs checked as well.

Dealers have been re-flashing the PCM (powertrain control module) on some models, which is covered under the vehicle's emission warranty.