General Motors’ Technical Service Bulletin (TSB 15285C) could be of great interest to 2011 Terrain owners who’ve been complaining about excessive oil consumption.
Chevy and GMC dealers were told in previous technical service bulletins to install updated engine control module calibration and perform an oil consumption test. This time dealers are told to diagnose the problem and replace the pistons … General Motors says repairs will be made free of charge based on warranty coverage extended to 7.5 years or 120,000 miles, whichever comes first. The coverage begins from the date of sale of the SUV.
This is great news for Terrain owners.