I do not think that the vet servo came in any of the trucks from the factory. I could be wrong but it does come in the Vet, GTO, F-body, and caprice/b-body. The one that most guys confuse with a vet servo is what I refer to as the 4l70E TBSS servo listed below. However I thought I would post a couple pic's of the different servos. Sorry I did not take the measurements of these servos. I did line them up so you guy's could see the various sizes found in GM vehicles. (FROM LEFT TO RIGHT) Here is a photo of a sonnax super hold second servo, the Corvette servo, the 4l70e TBSS servo, a 553 full size truck/car servo, and the 554 servo found in light duty S10 vehicles. All of the servos are OE except for the first servo from sonnax.

Here is a photo of the Sonnax 2nd, the vette 2nd and the 4l70e TBSS 2nd servo.


Hope this helps. Vince B