Get details on key features of 2019 GMC Terrain SLE and SLT small SUV including the C-shaped LED signature lighting, front-to-back flat load floor, available built-in navigation, and traction select system. My Terrain basically died yesterday and I'm going to be getting it towed to the dealer tomorrow, but wanted to get an idea of what I might be in for. The CEL lit up a few weeks ago with the first code, P0420, the Catalytic Converter Bank 1 was below the efficiency threshold. Cost of diagnosing the P228D code. Labor: 1.0 The cost of diagnosing the P228D code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. The rule of P228C 2012 2012 Gmc Terrain code when it comes to emissions-related vehicle repair is that any modification that changes the vehicle from a certified configuration to a non-certified configuration is considered tampering: this applies to both vehicle owners and repair facilities and is, therefore, a Federal offense. Replacing a catalyst with a straight pipe is one traditional example of P228C. Find GMC Terrain recalls information, reported by the NHTSA, and we will help you find a nearby service center where you can get your car fixed.