C5 Tech Corvette Tech/Performance: LS1 Corvette Technical Info, Internal Engine, External Engine, Tech Topics, Basic Tech, Maintenance, How to Remove & Replace
Sponsored by:
Sponsored by:

c5 tac module

Thread Tools
 
Search this Thread
 
Old Feb 2, 2025 | 12:37 PM
  #1  
Justin Raney's Avatar
Justin Raney
Thread Starter
Melting Slicks
 
Joined: Apr 2021
Posts: 2,188
Likes: 82
Default c5 tac module

How can i confirm if a c5 tac module is in fully functional working condition with it removed from the vehicle or on the vehicle? The car is missing the bcm and tumbler so cant power on. Is there a way to diode, continuity or voltage test?

Last edited by Justin Raney; Feb 2, 2025 at 12:45 PM.
Reply
Old Feb 2, 2025 | 12:44 PM
  #2  
mmartinez's Avatar
mmartinez
Melting Slicks
15 Year Member
Active Streak: 30 Days
Active Streak: 60 Days
Liked
 
Joined: Sep 2008
Posts: 3,117
Likes: 793
From: Espanola New Mexico
Default

You must have a fully functional car, I don't believe you can bench test it, for one thing it needs a functional seriel data buss, which without a BCM it doesn't have. Might try to find a reputable company that can test the TAC module.
Reply
Old Feb 2, 2025 | 01:13 PM
  #3  
lucky131969's Avatar
lucky131969
Tech Contributor
15 Year Member
Active Streak: 30 Days
Community Builder
Liked
 
Joined: Jan 2007
Posts: 19,245
Likes: 1,092
From: Dyer, IN
Default

Originally Posted by Justin Raney
Is there a way to diode, continuity or voltage test?
Nope.
Reply
Old Feb 2, 2025 | 02:39 PM
  #4  
Justin Raney's Avatar
Justin Raney
Thread Starter
Melting Slicks
 
Joined: Apr 2021
Posts: 2,188
Likes: 82
Default

Originally Posted by lucky131969
Nope.
Do they normally go bad or usually no issues? I had a 99 for 2 years and didnt have any issues just regular repairs and cam headers i added. I have an 04 gto now still cable driven like my 98 z28 was and seen the GTO 05-06 has a tac module that may sometime fail.

Last edited by Justin Raney; Feb 2, 2025 at 08:35 PM.
Reply
Old Feb 2, 2025 | 02:55 PM
  #5  
lucky131969's Avatar
lucky131969
Tech Contributor
15 Year Member
Active Streak: 30 Days
Community Builder
Liked
 
Joined: Jan 2007
Posts: 19,245
Likes: 1,092
From: Dyer, IN
Default

Originally Posted by Justin Raney
Do they normally go bad or usually no issues? I had a 99 for 2 years and didnt have any issues just regular repairs and cam headers i added. I have an 04 gto now still cable driven like my 98 z28 was and seen the GTO 05-06 has a tac module that may sometime fail. Its from a vehicle that had the engine removed before purchasing other then that its complete.
so you don't own a C5 anymore?
Reply
Old Feb 2, 2025 | 08:30 PM
  #6  
Justin Raney's Avatar
Justin Raney
Thread Starter
Melting Slicks
 
Joined: Apr 2021
Posts: 2,188
Likes: 82
Default

Originally Posted by lucky131969
so you don't own a C5 anymore?
I had sold it after being harassed with sound or other frequencies military controls type of things over paint since 2013. I've been busy since late 2012 and had forgotten how old they were before purchasing it in 2021. I also had a 95 z28 in 2008 and a 98 z28 hardtop both 6 speeds and a classic 66 in 2006. I think most are ragged out these days but the f-bodies I had were pretty good condition. The c5 I bought stock noticed needed driveshaft couplers and bought the aluminum 10mm solid couples on eBay, tsp headers, Elgin 1839 cam 220/224, pac1219s texas speed pushrods as well as a new aftermarket balancer. I had it running like the other vehicles I've had just in 2017 I someone rear ended my 2001 Ford escort I bought with blown head gasket in late 2012 I had been driving that since. Anyway that accident did alot of body damages so I bought the c5 as a new daily sold it to buy a GTO as they are newer and gm didn't have much available. I use to live by San Antonio raceway but they recently shut down so I didn't get a track time on the Corvette it was the 3.15 gear performance axle package.

Last edited by Justin Raney; Feb 2, 2025 at 08:36 PM.
Reply
Old Feb 2, 2025 | 09:50 PM
  #7  
lucky131969's Avatar
lucky131969
Tech Contributor
15 Year Member
Active Streak: 30 Days
Community Builder
Liked
 
Joined: Jan 2007
Posts: 19,245
Likes: 1,092
From: Dyer, IN
Default

Ok then
Reply
Old Feb 3, 2025 | 10:52 AM
  #8  
helga203's Avatar
helga203
Le Mans Master
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Jul 2010
Posts: 5,954
Likes: 711
Default

Originally Posted by Justin Raney
I had sold it after being harassed with sound or other frequencies military controls type of things over paint since 2013. I've been busy since late 2012 and had forgotten how old they were before purchasing it in 2021. I also had a 95 z28 in 2008 and a 98 z28 hardtop both 6 speeds and a classic 66 in 2006. I think most are ragged out these days but the f-bodies I had were pretty good condition. The c5 I bought stock noticed needed driveshaft couplers and bought the aluminum 10mm solid couples on eBay, tsp headers, Elgin 1839 cam 220/224, pac1219s texas speed pushrods as well as a new aftermarket balancer. I had it running like the other vehicles I've had just in 2017 I someone rear ended my 2001 Ford escort I bought with blown head gasket in late 2012 I had been driving that since. Anyway that accident did alot of body damages so I bought the c5 as a new daily sold it to buy a GTO as they are newer and gm didn't have much available. I use to live by San Antonio raceway but they recently shut down so I didn't get a track time on the Corvette it was the 3.15 gear performance axle package.
. All what was asked if you had a C5.
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

 Michael S. Palmer
story-1

2027 Corvette vs The World: Every Model vs Closest Competitor

 Joe Kucinski
story-2

10 Most Common Corvette Problems of the Last 20 Years!

 Joe Kucinski
story-3

5 MOST and 5 LEAST Popular Corvette Model Years in History!

 Joe Kucinski
story-4

2027 Corvette Buyer's Guide: Everything You Need to Know!

 Joe Kucinski
story-5

10 Things C8 Corvette Owners Hate (But Won't Tell You)

 Joe Kucinski
story-6

10 Best Corvettes Coming to Barrett-Jackson Palm Beach 2026!

 Brett Foote
story-7

Every Corvette Grand Sport Explained! (C2, C4, C6, C7, & C8)

 Joe Kucinski
story-8

Grand Sport & Grand Sport X Launch Alongside All-New 535hp LS6 V8!

 Michael S. Palmer
story-9

5 Reasons Bad Drivers Crash & 5 Ways to Avoid a Costly Mistake!

 Joe Kucinski
Old Feb 3, 2025 | 11:20 PM
  #9  
Justin Raney's Avatar
Justin Raney
Thread Starter
Melting Slicks
 
Joined: Apr 2021
Posts: 2,188
Likes: 82
Default

Yeah

Last edited by Justin Raney; Feb 12, 2025 at 05:37 AM.
Reply
Old Feb 3, 2025 | 11:42 PM
  #10  
Justin Raney's Avatar
Justin Raney
Thread Starter
Melting Slicks
 
Joined: Apr 2021
Posts: 2,188
Likes: 82
Default

yeah

Last edited by Justin Raney; Mar 8, 2025 at 08:30 AM.
Reply
Old Feb 4, 2025 | 08:22 AM
  #11  
lucky131969's Avatar
lucky131969
Tech Contributor
15 Year Member
Active Streak: 30 Days
Community Builder
Liked
 
Joined: Jan 2007
Posts: 19,245
Likes: 1,092
From: Dyer, IN
Default

@helga203 Would you like to know more?
Reply
Old Feb 4, 2025 | 10:35 AM
  #12  
helga203's Avatar
helga203
Le Mans Master
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Jul 2010
Posts: 5,954
Likes: 711
Default

Originally Posted by Justin Raney
Lol mine are in the above posts. The 66, 98 z28 hardtop, 99 c5, 04 w40 GTO. The only one I own now is the 04 GTO my dad still owns a 00 convertible is why I occasionally show up here. They're kind of cool why were you asking or what difference does it make? The manual says 52ftlbs for 10mm couplers and 66ft lbs for 12mm I did put the aluminum solid couplers at 70ft lbs I had chatted with you in 2021 but had disappeared.

I had decided to get out of the c5 alot of fiberglass expensive parts. The Camaro z28 6 speeds and m12 GTO trans with z06 c5 gearing are cool too the Corvette was compact. The red one 99 I had sold bought the GTO 04 put tsp headers hard to say which is better but I think the GTO is a bit nicer. The tsp headers on the c5 hit the oil pan I had hammered them. The 66 is from when I was 16-17 2006-2007 and sold it disassembled in 2021 after that escort wreck and found a daily driver c5. The z28 I had sold for a family emergency in 2014 I bought stock in 2009 hardtop 6 speed and put an s475 turbo 6-9lbs the graph is 6lb dyno and the 375whp tq is small bullit cam, Manley duals, ud pulley, hooker headers and spec 2+ clutch.
​​​​
​​​​
Are you still talking about your original post?? I'm not the brightest person but i didn't see anything about a tac question in this post.




"How can i confirm if a c5 tac module is in fully functional working condition with it removed from the vehicle or on the vehicle? The car is missing the bcm and tumbler so cant power on. Is there a way to diode, continuity or voltage test"?
Reply
Old Feb 5, 2025 | 02:41 PM
  #13  
Justin Raney's Avatar
Justin Raney
Thread Starter
Melting Slicks
 
Joined: Apr 2021
Posts: 2,188
Likes: 82
Default

Delete

Last edited by Justin Raney; Feb 12, 2025 at 05:38 AM.
Reply
Old Feb 5, 2025 | 10:14 PM
  #14  
helga203's Avatar
helga203
Le Mans Master
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Jul 2010
Posts: 5,954
Likes: 711
Default

Originally Posted by Justin Raney
Yeah I was just saying that I still work a 00 convertible my dad owns. That's the tac module I was referring to but as it doesn't have a bcm I can't just plug in an OBD2 connector live data and check throttle percentage.
Sorry cant help. This one is way over my head GL
Reply

Get notified of new replies

To c5 tac module





All times are GMT -4. The time now is 07:22 PM.

story-0
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

Slideshow: Should you buy a 2020-2026 Corvette or wait for 2027?

By Michael S. Palmer | 2026-04-22 10:08:58


VIEW MORE
story-1
2027 Corvette vs The World: Every Model vs Closest Competitor

Slideshow: 2027 Corvette lineup vs the world.

By Joe Kucinski | 2026-04-20 17:58:41


VIEW MORE
story-2
10 Most Common Corvette Problems of the Last 20 Years!

Slideshow: 10 major Corvette problems from the last 20 years.

By Joe Kucinski | 2026-04-14 16:37:05


VIEW MORE
story-3
5 MOST and 5 LEAST Popular Corvette Model Years in History!

Slideshow: 5 most and least popular Corvette model years.

By Joe Kucinski | 2026-04-08 13:25:01


VIEW MORE
story-4
2027 Corvette Buyer's Guide: Everything You Need to Know!

Slideshow: 2027 Corvette buyer's guide

By Joe Kucinski | 2026-04-17 16:41:08


VIEW MORE
story-5
10 Things C8 Corvette Owners Hate (But Won't Tell You)

Slideshow: 10 things C8 Corvette owners hate, but won't tell you.

By Joe Kucinski | 2026-04-01 18:36:07


VIEW MORE
story-6
10 Best Corvettes Coming to Barrett-Jackson Palm Beach 2026!

Slideshow: Should you add one of these incredible Corvettes to your garage?

By Brett Foote | 2026-04-01 18:14:05


VIEW MORE
story-7
Every Corvette Grand Sport Explained! (C2, C4, C6, C7, & C8)

Slideshow: Every Corvette Grand Sport explained

By Joe Kucinski | 2026-03-26 07:13:44


VIEW MORE
story-8
Grand Sport & Grand Sport X Launch Alongside All-New 535hp LS6 V8!

Slideshow: Breaking down the 2027 Grand Sport, Grand Sport X, Stingray, and LS6 V8.

By Michael S. Palmer | 2026-03-26 13:48:45


VIEW MORE
story-9
5 Reasons Bad Drivers Crash & 5 Ways to Avoid a Costly Mistake!

Slideshow: 5 reasons bad drivers crash sports cars & 5 ways to avoid a costly shame!

By Joe Kucinski | 2026-03-25 16:32:55


VIEW MORE