Harsh Garage Shift
WARNING: This page is about a different car, the 2018 Chevrolet Suburban 3500 HD. However, it is still accessible from the selected car via links, so may be relevant.
| Checks | Causes |
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NOTE:
On cold days, approximately 32°F (0°C) or colder, the transmission is designed to shift differently. The transmission uses a warm-up mode shift schedule until the engine reaches normal operating temperature. While the transmission is in warm-up mode, it is normal for transmission upshifts to be delayed or held longer. This feature improves heater performance by giving quicker vehicle warm-ups. |
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| Engine | Elevated engine RPM - Verify correct engine operating RPM per application. |
| Control Solenoid (w/Body and Valve) Valve Assembly (40) |
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