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2. GM recalls nearly 500,000 pickup trucks and SUVs. Here's what ...

   www.aol.com/gm-recalls-nearly-500-000-160625464.html

   Faulty transmission control valve can fail and cause rear ... resulting in a gradual loss of pressure within the valve that can cause harsh shifting. ... GMC customer service at 1-800-462-8782 or ...

3. GM 4L80-E transmission - Wikipedia

   en.wikipedia.org/wiki/GM_4L80-E_transmission

   The 4L80-E uses two shift solenoids, initially called Shift Solenoid A and Shift Solenoid B; they were later changed to comply with OBD-II regulations to 1-2 shift solenoid and 2-3 shift solenoid. By activating and deactivating the solenoids in a predetermined pattern by the PCM, four distinct gear ratios can be achieved.

4. Variable force solenoid - Wikipedia

   en.wikipedia.org/wiki/Variable_force_solenoid

   A variable force solenoid (VFS) is an electro-hydraulic device that controls pressure proportionally or inversely proportionally to a signal (voltage or current) obtained from the on-board controller of a powertrain. A low flow VFS is used as a signal level devices for transmission line pressure control or application of clutches.

5. GMC Denali - Wikipedia

   en.wikipedia.org/wiki/GMC_Denali

   In 2007, the GMC Yukon and Sierra lines were completely revamped with the Denali included, now with a 6.2L V8 (producing 380 HP / 417 lb/ft) in the Yukon Denali and (producing 403 HP / 417 lb/ft) in the Sierra Denali), six-speed automatic transmissions, and many new features and options such as power folding second row seats and rear backup camera.

6. Transmission control unit - Wikipedia

   en.wikipedia.org/wiki/Transmission_Control_Unit

   A transmission control unit (TCU), also known as a transmission control module (TCM), or a gearbox control unit (GCU), is a type of automotive ECU that is used to control electronic automatic transmissions. Similar systems are used in conjunction with various semi-automatic transmissions, purely for clutch automation and actuation.

7. GM adds over 132,000 heavy duty pickups to recall for ... - AOL

   www.aol.com/gm-adds-over-132-000-132434205.html

   General Motors is adding over 132,000 heavy-duty pickups in the U.S. to a previous recall for tailgate release switches that can short circuit and open the gates while the trucks are in park. The ...