What transmission do I have?

2007 CHEVROLET SILVERADO
63,000 MILES • 5.3L • V8 • 4WD • AUTOMATIC
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210CHEVY
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  • 2 POSTS
I have a 2007 classic silverado z71 5.3 engine. Vin number 1GCEK19Z87Z102241
It's sluggish going forward and wont move in reverse like its stuck. Would like to know what transmission i have to swap it out with a used one for now
Feb 27, 2026 at 1:34 AM
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210CHEVY
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Sluggish moving forward and it won't move in reverse . It's a 2007 clsssic chevy silverado z71 5.3 engine.
Feb 27, 2026 at 7:20 AM (Merged)
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STEVE W.
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 15,146 POSTS
Easy to tell, they had the 4 speed 4L60E, then the hybrid truck had the 2ML70. The only other transmission was the 6 speed 6L80E which was used in the HD versions with the 6.0 and 6.2. So a non hybrid 5.3 would have the 4L60E
Feb 27, 2026 at 7:50 PM
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