What transmission do I have?

Tiny
210CHEVY
  • MEMBER
  • 2007 CHEVROLET SILVERADO
  • 5.3L
  • V8
  • 4WD
  • AUTOMATIC
  • 63,000 MILES
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
Friday, February 27th, 2026 AT 1:34 AM

2 Replies

Tiny
210CHEVY
  • MEMBER
  • 2 POSTS
  • 2007 CHEVROLET SILVERADO
  • 63,000 MILES
Sluggish moving forward and it won't move in reverse. It's a 2007 clsssic chevy silverado z71 5.3 engine.
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Friday, February 27th, 2026 AT 7:20 AM (Merged)
Tiny
STEVE W.
  • MECHANIC
  • 15,688 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
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Friday, February 27th, 2026 AT 7:50 PM

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