Recently I noticed my navigation not working in my 2016 Sierra Denali. The GPS has a red X over it. I have done some research and most people are saying the green onstar light on the rearview mirror turned red when they had an issue. Mine is still lit green but no GPS signal. Can anyone point me in the right direction for a fix?
UPDATE: took it to the dealer and they said it is a pretty common issue with the type of ATF fluid that GM used in these trucks causing the torque converter to shudder. They changed the transmission fluid and it seems to have fixed the problem.
I recently bought a used 2016 Sierra Denali 5.3L 4x4 in March with 48k miles. Truck has been great until yesterday (now 52k miles) when I ease into the gas it shudders and shakes like crazy until i punch it. The tach is bouncing up and down and it doesn't matter if it's in v8 or v4. It almost feels like it's a misfire but it's weird that it only does it when I'm easing into the throttle or going uphill. The truck has the 8 speed transmission. Has anyone else ran into something like this and would the manufacturer warranty cover the fix for this?