The problem: Affected vehicles may exhibit excessive engine oil consumption (less than 2,000 miles per quart). This may be due to excessive piston ring wear.
Corrective action: Dealers will diagnose the condition, and if confirmed, replace the pistons.
Warranty info: This service bulletin is being performed free of charge under a special coverage adjustment of seven years and six months, or 120,000 miles, whichever comes first, from the date of sale.
What owners should do: Call your local dealer with your vehicle’s identification number to determine if your vehicle is involved in this service bulletin. You can call Chevrolet at 800-222-1020, GMC at 800-462-8782 or the National Highway Traffic Safety Administration hotline at 888-327-4236. Reference TSB No. 15285C.
Editor’s note: This is only one of dozens of service bulletins issued each month by automakers. Please check your automaker’s website to see if your vehicle has any service bulletins pending.