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8.0
pretty bad- Typical Repair Cost:
- No data
- Average Mileage:
- 6,500 miles
- Total Complaints:
- 2 complaints
transmission problem
Helpful websites
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A D V E R T I S E M E N T S
2017 GMC Sierra 5.3 with the 8 speed transmission. Upon cold start up while shifting from 1-2 the transmission clunks real bad. Even after driving and returning from an errand the 1-2 shift will clunk, very noticeable even passengers notice. I do not expect a normal life expectancy from this transmission due to this problem. Brought the truck to a GM dealer, service advisor said "they all do that", no fix. I changed the transmission fluid very early (very expensive fluid change!) as there was talk that a new fluid may help. No difference, still clunks.
I would not buy another modern GM truck after this experience, dealer did not help, many owners complaining of the same thing and more major problems with these trucks is the carbon build-up due to the active fuel management and direct fuel injection along with fuel injector failure, 4WD transfer case sensor failure and fuel level sensor failure.
- Albert F., London, ON, Canada