No reverse

1999 GMC YUKON
176,000 MILES • 5.4L • 6 CYL • 4WD • AUTOMATIC
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JENNIFER MAYS
  • MEMBER
  • 2 POSTS
My first major issue. I can drive, just not reverse. The lock engine icon light comes on and I can't move in reverse, even in neutral. Help please!
Jan 10, 2019 at 7:02 AM
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ASEMASTER6371
  • ✓Experienced Mechanic
  • 52,796 POSTS
Good morning,

When was the last time you had the oil/filter in the transmission?

https://www.2carpros.com/articles/how-to-service-an-automatic-transmission

Is the check engine light on? If it is, can you have it read? A parts store will check it for free. That will lead us in a direction for the failure.

https://www.2carpros.com/articles/automatic-transmission-problems

In most cases, the issue is internal in the transmission not a sensor or solenoid.

Roy
Jan 10, 2019 at 11:49 PM
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JENNIFER MAYS
  • MEMBER
  • 2 POSTS
Thank you!I will definitely go by auto part store this weekend.
Jan 11, 2019 at 2:28 AM
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ASEMASTER6371
  • ✓Experienced Mechanic
  • 52,796 POSTS
Sounds like a plan.

Let us know what the results are from the code check.

Roy
Jan 11, 2019 at 2:47 AM
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