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What are some common transmission issues with the 2010 GMC Sierra?
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★ Top Answer
While the 2010 GMC Sierra 1500 is generally known for its durability and reliability as a truck, its transmission is often considered a weak spot. This doesn't mean that it's extremely unreliable, but there's a likelihood of encountering issues - either minor or more significant - over the course of owning the truck. GMC has issued several technical bulletins, and users have reported various problems. One of the most common transmission issues is abrupt shifting, particularly between first and second gear. The root cause has been identified as the wiring harness for the torque converter clutch. Drivers have also experienced a range of diagnostic fault codes like P0776, P0796, P2714, and P2723, which are usually linked to a pressure leak in the clutch regulating valve.
More answers
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Some issues that could arise with the transmission in a 2010 GMC Sierra include grinding of gears, unresponsiveness, and contamination resulting from insufficient maintenance.
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I see that error code 796 is displayed. Can I replace the oil filter and put in new oil in my 2010 GMC Sierra 1500 with a 5.3 engine?
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I'm having difficulty shifting through all the gears, especially when I try to shift into different gears. I've noticed that it feels a bit rough, and my vehicle currently has 33,000 miles on it. This issue may indicate trouble with error code PO796.
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My 2010 GMC Sierra 4.8 1500 has a very loud whining noise when it's in low gear, but once it shifts to 2nd gear, the noise goes away. The truck has approximately 116,000 miles on it. Thank you.
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