I need someone to repair both 1st e 2nd fix

Seems to have a history of issues. You need someone with a pro grade scan tool computer that is able to monitor the module and sensor data.

https://www.google.com/search?q=2011+GMC+Sierra.+transmission+will+only+go+into+1st%2C+2nd%2C+and+reverse

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Check the rubber transmission mount.

Need the make, model and year.

The solenoids are inside the transmission.
You may need a book and some special tools to make the repairs.

you may need your transmission fixed. what is most likely the problem is the torque converter in your transmission is winding when your at a stop and is in need of repair. i hope this helps. Be careful and drive safe!

IF the abs dash light is on and if the speedometer is sluggish or not working at all, it is probably a bad speed sensor on the transmission. and easy fix under $40 for the part. Mine was stuck in second gear for a while then worked then it stuck in first gear and i had the CHECK ENGINE light on.

popping out of gear means your shifting forks need adjustment, same as the grinding. the tranny is probably good, just the top part, the shifting mechanism needs to be repaired, so it would be cheaper to repair than rebuilding the whole transmision.still, im guessing about 300-500$ depending where you live.

It is propably the gear box. Take the seat off and you will see the gears inside. Mine works only in 2nd and not the 1st or reverse. But I know it is the gear box since my husband replaced the 1st one a while agao. Just need to find the web site for the repacement part. Only cost us about $30 to fix last time. Hope this helps.

I have the same problem also. Hope someone has the answer.

Yes if you tell me what was originally wrong with set! First thing that needs to be done is self diagnosis test. You can do this by pressing the input/device button and menu at the sametime on your set after you turn on. Hold it for 5 seconds. It will have a 2 digit sequence blink. This will be the error code. Let me know what it is. For more info ctechnicians.com