Are you sure Ben? 2000 model year Chevrolet Silverado 2500 light duty. I'm fairly certain the 5 speed was offered in the 2000 2500C/K, but not in the Silverado. I could be wrong but there some that were not offered with a manual transmission; 1500HD being another one. I'm not talking about CPO.
Yes.
In the GMT-800 half ton pickups from 1999-2007 (classic) you could get a 5-speed with the 4.3 V6 and 4.8 V8. 5.3/manual was not available
In the GMT-800 3/4 and 1 ton gassers (and the 99-00 2500 light duty) from 1999-2007 (classic) you could get a 5-speed manual with the 6.0 and obviously the ZF6 with the 8.1
In the GMT-800 3/4 and 1 ton diesels from 2001-2006 you could get the ZF6.
The only config I am aware of that you could not get a manual with (or maybe you could, but ive never seen one) was the 2001-2006 1500HD....but the 1500HD was an oddball in itself and you dont see many of them. Im not even sure the purpose of making them.
They (the 2500 light duty and 1500HD, same things) IMO actually did have a purpose from 1999-2000, before the GMT-800 HD's were released...GM didnt have the GMT-800 HD platform ready yet, the only thing that was heavier than the half ton platform and available in the parts bin at the 1999 launch of the GMT-800's was the 2500 Suburban platform (basically a 1500 frame except with bigger axles, hydroboost brakes, 8 lug wheels, a 4L80, and 6.0). GM probably figured "well what are we going to do from 1999 to 2001 when the -800 HD's are ready? Surely no one looking for a heavier-than-half-ton truck in the 1999-2000 time frame is going to want to buy a truck that looks 10 years old (because to get a true 2500HD or 3500 in 1999-2000, you had to buy a GMT-400 truck, the C/K body style) when we already have the new half ton silverados out..."
So as a bandaid/temp fix to cater to those people who wanted a "new" looking truck, but needed something heavier duty than the half ton, they took the -800 half ton silverado body, dropped it onto a 2500 Suburban platform, and called it a "2500" with an 8,600lb GVWR.
Then when the GMT-800 [true] HD's came out in 2001 and the GMT-400 HD truck production shutdown, the need for the 2500 light duty literally disappeared overnight. Why GM kept making it, I have no idea. But they didnt want people confusing it with the new "true" HD pickup that came out in 2001, so in 2001 they renamed the "wannabe" from "2500" to "1500HD".
The 1500HD (from 2001-2006) was only offered in one configuration, crew cab, short bed, 4x4, autotrac electronic xfer case, 4L80, 6.0.
Like I said, I have no idea why they kept the 1500HD, maybe for licensing stuff, so consumers could have a pickup truck that was a little more capable than a typical half ton, but still only had an 8,600lb GVWR to circumvent being classified as a "commercial" vehicle...which might have caused problems for some people in some states...thats the ONLY reason I can think of for keeping the 2500LD/1500HD around after the introduction of the GMT-800 HD's in 2001...
ben