2012 GMC Canyon Owner's Manual - Page 249

Vehicle Care How to Reset the Engine Oil Life System Reset the system whenever the engine oil is changed so that the system can calculate the next engine oil change. To reset the system: 1. Turn the ignition to ON/RUN, with the engine off . 2. Press and release the stem in the lower center of the instrument cluster until the OIL LIFE message is displayed. 3. Once the alternating OIL LIFE and RESET messages appear, press and hold the stem until several beeps sound. This confirms that the oil life system has been reset. 4. Turn the key to LOCK/OFF. If the CHANGE OIL message comes back on when the vehicle is started, the engine oil life system has not been reset. Repeat the procedure. 10-13 Automatic Transmission Fluid When to Check and Change Automatic Transmission Fluid A good time to check the automatic transmission fluid level is when the engine oil is changed. Change the fluid and filter at the intervals listed in Maintenance Schedule on page 11‑3, and be sure to use the transmission fluid listed in Recommended Fluids and Lubricants on page 11‑11. Notice: Too much or too little fluid can damage the transmission. Too much can mean that some of the fluid could come out and fall on hot engine parts or exhaust system parts, starting a fire. Too little fluid could cause the transmission to overheat. Be sure to get an accurate reading if checking the transmission fluid. Wait at least 30 minutes before checking the transmission fluid level if the vehicle has been driven: . How to Check Automatic Transmission Fluid Because this operation can be a little difficult, it may be decided to have this done at the dealer service department. If not taken to the dealer, be sure to follow all the instructions here, or a false reading on the dipstick could result. When outside temperatures are above 32°C (90°F). At high speed for quite a while. In heavy traffic - especially in hot weather. While pulling a trailer. . . . To get the right reading, the fluid should be at normal operating temperature, which is 82°C to 93°C (180°F to 200°F).