Looking for PCM P/N for L21 454 (99 P12 RV Chassis)

[Steady Eddie]

Dammit--

There are no Part Numbers in my three-volume
P12 Chassis Service Manuals (?).

I thought I'd just "cut a fat hog" and simply look
up the crankshaft in the book..no such luck.
My Chevy Stealership, in the Parts Department,
does have some, if not all, of the P12 info on
their computer, I've seen the exhaust system
parts breakdown pictured and it is a P12 specific
set of parts. No other GM Chassis has it.

Part of "our" problem is due to the rarity of the
P12/L21 motor combo. I can't even find out
if there was a P12 made in 1999.
There exists a 1999 P12,
one volume (thick) Service Manual--
I've seen them for sale on eBay. But whether or
not GM ever actually produced any, I can't find
out. In the late fall of 1998, GM sold the rights
to the P30-series MH Chassis to Workhorse Custom
Chassis (WCC)--they did not sell the rights to the
P12, WCC had to copy GMs lead, and WCC finally
came out with their own version, around 2000,
they had the W22 about then..all 8.1 L Class A
motorhomes are on a Workhorse chassis.

Still coming up blank on the forged or not L21 Crank...
but it makes sense to have one in a Medium Duty
truck engine.

Steady Eddie

[N0DIH]

I have right next to me my 1999 P12 FSM, got it on eBay for $12 or so. Not exactly popular book.... Might be why they aren't so popular....

My mom and dad picked up a 38 foot 2003 Damon with the Workhorse with 8100/Allison slushbox. Ran great, that is a great power combo.

[Steady Eddie]

The Manuals aren't popular because of the rarity
of the P12/L-21 combo. I Moderate a Yahoo! Group:
The P12 Chassis Group, and I have but 8 Members,
it is a discussion group for Owners of the P12,
and I find that no one knows of the P12, they may
have walked right past one in a Campground, but
did not know what to look for. You all are invited
to come over and sign up...and look at the Photos
and Files Sections..it is free, and like the Plug Mod,
free is a very good price...

Steady Eddie

[Steady Eddie]

Just returned from a trip to Bend, Oregon, driving
our L-21 P12 Coach...Drove it 400 miles and used
40 gallons of gas..not bad mileage. But I had to
get it back to the Paint Shop right away and did
not have time to look for PCM Part Numbers...I did
find--out on the 'Net--a .pdf file from Delphi that
tells all about the Electronic Throttle Control.
It does a bunch of different things..

http://delphi.com/pdf/techpapers/2000-01-0556.pdf

Steady Eddie