Sierra C3

Replace spark plugs at 80,000 miles and inspect ignition wires on GMC Sierra C3

Problem Description and Possible Solution

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.

Problem Data
RepairPal Verified
Average mileage: (–)
1 model year affected: 2001
1 person reported this problem