The problem: Shifts from Park to Drive or Reverse may feel firm, and a clunk can occur as the engine starts, or immediately after it does so. A malfunction indicator lamp may illuminate.
Corrective action: Dealers will update the transmission control module software.
Warranty info: This service bulletin is being performed free of charge under the Chevrolet/GMC new-car warranty.
What owners should do: Call your local dealer with your vehicle’s identification number to determine if it’s involved in this service bulletin. You can also call Chevrolet at 800-222-1020, GMC at 800-462-8782 or NHTSA at 888-327-4236. Reference TSB No. 15-NA-007.
Need to find a dealer for service? Go to Cars.com Service & Repair to find a local dealer.
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.