Originally Posted by 89sandman
Just bought a 2000 Fleetwood Flair with the workhorse chassis. The owner said he paid extra for the 8.1L engine but I haven't seen any others in this year with the 8.1. Is there a number in the vin or the serial number that will tell me for sure which engine it has? Is there also a number to tell me which transmission it has?
Yes, there is. The 8th VIN character is code for the engine. If a "G", you have an 8.1L (L18) GM motor. If a "J", you have the 7.4L (L29) GM motor.
Unfortunately, there isn't a vin code for the tranny, but I'm "assuming" you have a P32 chassis ( indicated by a 3 or a 5 in the 6th VIN position) and if so, you have a 4 speed GM tranny model 4L-80E.
If you need more info, post the last 8 digits (only) of the chassis vin # and I'll see what else I can find for you.