Harsh Torque Converter Clutch Apply, Or Inoperative Or No Electronically Controlled Capacity Clutch Control

WARNING: This page is about a different car, the 2018 GMC Yukon XL, 2018 GMC Yukon, 2018 Chevrolet Tahoe, 2018 Chevrolet Suburban 3500 HD, and 2018 Chevrolet Suburban. However, it is still accessible from the selected car via links, so may be relevant.

Checks	Causes
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.
Torque Converter Assembly (1)	Inspect for leaking or damaged torque converter clutch hub seal. Diagnose torque converter assembly for possible internal damage. Refer to Torque Converter Diagnosis .
Clutch Select Solenoid Valve Spring (353)	Inspect for broken spring within the lower valve body in the torque converter clutch regulator apply valve line up (355).