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.

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Known Problems

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.