PCM Diagnostics & Tuning HP Tuners | Holley | Diablo

98 Formula PCM to 99 PCM

Thread Tools
 
Search this Thread
 
Old Apr 7, 2008 | 09:49 AM
  #21  
flanders's Avatar
Staging Lane
iTrader: (1)
 
Joined: Aug 2005
Posts: 62
Likes: 0
Default

no updates so far except that some folks have been succesful using the efi segment swap to keep the factory fuel gauge.
i have lived with this swap for almost a year now and thru an engine swap and it has been trouble free.
Reply
Old May 4, 2008 | 06:07 PM
  #22  
Vetal's Avatar
TECH Fanatic
15 Year Member
Photogenic
Photoriffic
Shutterbug
iTrader: (3)
 
Joined: Aug 2006
Posts: 1,987
Likes: 2
From: Latvia
Default

If I understand correctly, fuel sender is the same on 98' and later cars? That would mean that newer PCM will still KNOW amount of fuel left, and you are able to see it in HPTuners? If so, I could live without gauge in the cluster, I guess, but is it so?
Reply
Old May 8, 2008 | 11:29 AM
  #23  
Vetal's Avatar
TECH Fanatic
15 Year Member
Photogenic
Photoriffic
Shutterbug
iTrader: (3)
 
Joined: Aug 2006
Posts: 1,987
Likes: 2
From: Latvia
Default

Is this the correct PCM? Looks a bit different to mine (98')
Attached Thumbnails 98 Formula PCM to 99 PCM-photo-0568sm.jpg   98 Formula PCM to 99 PCM-photo-0570sm.jpg  
Reply
Old May 8, 2008 | 12:48 PM
  #24  
slow's Avatar
TECH Senior Member
20 Year Member
iTrader: (7)
 
Joined: Dec 2001
Posts: 6,150
Likes: 7
From: Orlando
Default

yes, that is a 01-02 pcm, and will work fine.

Ryan
Reply
Old May 8, 2008 | 03:35 PM
  #25  
Vetal's Avatar
TECH Fanatic
15 Year Member
Photogenic
Photoriffic
Shutterbug
iTrader: (3)
 
Joined: Aug 2006
Posts: 1,987
Likes: 2
From: Latvia
Default

How do you identify them?
Reply
Old May 9, 2008 | 02:08 PM
  #26  
slow's Avatar
TECH Senior Member
20 Year Member
iTrader: (7)
 
Joined: Dec 2001
Posts: 6,150
Likes: 7
From: Orlando
Default

The service number, on the pcm.

Stock 1999-2000 LS1 PCM, Service number 09354896
2001-2002 LS1 PCM, Service number 12200411

Ryan
Reply
Old May 9, 2008 | 06:19 PM
  #27  
Vetal's Avatar
TECH Fanatic
15 Year Member
Photogenic
Photoriffic
Shutterbug
iTrader: (3)
 
Joined: Aug 2006
Posts: 1,987
Likes: 2
From: Latvia
Default

Thanks
Reply
Old May 5, 2009 | 10:58 AM
  #28  
Vetal's Avatar
TECH Fanatic
15 Year Member
Photogenic
Photoriffic
Shutterbug
iTrader: (3)
 
Joined: Aug 2006
Posts: 1,987
Likes: 2
From: Latvia
Default

Is this correct (C2-8 is missing from list above)?
Blue C2-8 TAN TO Red C2-25

Also, if I connect C2-10 (Fuel Level Sensor Signal), will I see fuel level via PCM?

Last edited by Vetal; May 5, 2009 at 08:08 PM.
Reply
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

 Verdad Gallardo
story-1

6 Common C5 Corvette Failures and What's Involved In Repairing Them

 Pouria Savadkouei
story-2

Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

 Verdad Gallardo
story-3

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-4

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-5

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
story-6

Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

 Verdad Gallardo
story-7

Awesome K5 Blazer Restomod Comes With C7 Corvette Power

 Verdad Gallardo
story-8

10 Camaros You Should Never Buy

 
story-9

10 LS Engine Myths That Refuse to Die

 Verdad Gallardo
Old Jun 4, 2017 | 06:48 PM
  #29  
taws6ali's Avatar
Teching In
10 Year Member
 
Joined: May 2011
Posts: 49
Likes: 0
From: michigan
Default

So what do i need to do to get my 98 fuel guage to work with 01 pcm and 99 fuel tank
Reply
Old Mar 17, 2018 | 05:49 PM
  #30  
Evans752's Avatar
TECH Enthusiast
15 Year Member
iTrader: (29)
 
Joined: Jan 2005
Posts: 565
Likes: 1
From: Logan, West Virginia
Default

Interested Article for sure!
Reply
Old Feb 20, 2020 | 05:25 PM
  #31  
Ricardo Romo's Avatar
Teching In
 
Joined: Feb 2020
Posts: 1
Likes: 0
Default

Originally Posted by taws6ali
So what do i need to do to get my 98 fuel guage to work with 01 pcm and 99 fuel tank

did you figure it out? I’m doing the swap and I also have a 99 fuel tank
Reply
Old Mar 3, 2025 | 11:45 AM
  #32  
vettdr's Avatar
Teching In
 
Joined: Mar 2025
Posts: 1
Likes: 0
Default tan wire delete seial data uart

new here i have a quick? what happens to data lines if u delete tan wire on 98 harness c2 pin 3
Reply




All times are GMT -5. The time now is 04:46 PM.

story-0
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Slideshow: This heavily modified 1971 Camaro mixes classic muscle car styling with a fifth-generation Camaro interior and modern LS3 power.

By Verdad Gallardo | 2026-05-12 18:06:42


VIEW MORE
story-1
6 Common C5 Corvette Failures and What's Involved In Repairing Them

Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.

By Pouria Savadkouei | 2026-05-07 18:44:57


VIEW MORE
story-2
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.

By Verdad Gallardo | 2026-04-21 13:57:02


VIEW MORE
story-3
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...

By Pouria Savadkouei | 2026-04-16 10:05:15


VIEW MORE
story-4
Top 10 Most Powerful Chevy Trucks Ever Made!

Slideshow: Top ten most powerful Chevy trucks ever made

By | 2026-03-25 09:22:26


VIEW MORE
story-5
Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Slideshow: Hennessey has turned the Silverado ZR2 into a 700-hp off-road monster with supercharged V8 power and a limited production run.

By Verdad Gallardo | 2026-03-24 18:57:52


VIEW MORE
story-6
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.

By Verdad Gallardo | 2026-03-23 18:53:41


VIEW MORE
story-7
Awesome K5 Blazer Restomod Comes With C7 Corvette Power

Slideshow: A heavily reworked 1972 K5 Blazer swaps its off-road roots for a low-slung street-focused build with modern V8 power.

By Verdad Gallardo | 2026-03-09 18:08:45


VIEW MORE
story-8
10 Camaros You Should Never Buy

Slideshow: There are thousands of used Camaros on the market but we think you should avoid these 10

By | 2026-02-17 17:09:30


VIEW MORE
story-9
10 LS Engine Myths That Refuse to Die

Slideshows: Which one of these myths do you believe?

By Verdad Gallardo | 2026-01-28 18:10:11


VIEW MORE