Audio Systems Find answers to all of your stereo, speaker and other audio technology questions here.
Sponsored by:
Sponsored by:

Retrofitting boom gts head unit

Thread Tools
 
Search this Thread
 
Old Aug 2, 2023 | 10:55 AM
  #1  
Hd589's Avatar
Hd589
Thread Starter
|
Tourer
5 Year Member
Liked
Loved
Community Favorite
Joined: Feb 2016
Posts: 349
Likes: 83
From: Florida
Default Retrofitting boom gts head unit

Bought a GTS head unit pn 76000779B from an 2021 and have a few questions about installing it in my 2018.

1. Do i need to download software to make it back compatible or is it already preinstalled in the hd stock software once they came out with the retrofit kit for the older bikes?

2. does it need to be flashed at the dealer?

any tips would be appreciated.

 
Reply
Old Aug 2, 2023 | 09:13 PM
  #2  
Ssitruc's Avatar
Ssitruc
Stellar HDF Member
5 Year Member
Liked
Loved
Community Favorite
Joined: Jun 2017
Posts: 2,325
Likes: 1,153
From: Oklahoma
Default

I think a 2021 bike would have came with the software making it backwards compatible, the update that made it backwards compatible was Software Update: MY20.19.39.00
Did the person you bought it from have any idea what software version it had on it before he took it out? Or what is the part number on the radio (post a pic of it), including the revision letter at the end of it?

It is easy to physically install once you get the outer faring off, unplug all the wires off the back of the stock one, then 4 bolts and its out... put the new one in, 4 bolts to hold it, then plug the wires right back into the new one.... so I would do that first, and save the money for the install.

Then turn it on...
If you get a "not compatible" message, then you're going to have to figure out how to get the software updated.... its doable, just a bit of a pain.

If it turns on and is just silent... take it to a dealer and get it "setup" for your configuration (amp(s), number of speakers, Etc.)... just out programming/"authorization" cost, here it would be 1/2 to 1 hour labor.

If it fires up and plays, and sounds right, then check everything to be sure everything you have is enabled and working (fade, Nav, intercom, Etc.)... same cost as above if you need a dealer to set it up for your bike's configuration.
 

Last edited by Ssitruc; Aug 2, 2023 at 09:23 PM.
Reply
Old Aug 2, 2023 | 10:49 PM
  #3  
Hd589's Avatar
Hd589
Thread Starter
|
Tourer
5 Year Member
Liked
Loved
Community Favorite
Joined: Feb 2016
Posts: 349
Likes: 83
From: Florida
Default

Originally Posted by Ssitruc
I think a 2021 bike would have came with the software making it backwards compatible, the update that made it backwards compatible was Software Update: MY20.19.39.00
Did the person you bought it from have any idea what software version it had on it before he took it out? Or what is the part number on the radio (post a pic of it), including the revision letter at the end of it?

It is easy to physically install once you get the outer faring off, unplug all the wires off the back of the stock one, then 4 bolts and its out... put the new one in, 4 bolts to hold it, then plug the wires right back into the new one.... so I would do that first, and save the money for the install.

Then turn it on...
If you get a "not compatible" message, then you're going to have to figure out how to get the software updated.... its doable, just a bit of a pain.

If it turns on and is just silent... take it to a dealer and get it "setup" for your configuration (amp(s), number of speakers, Etc.)... just out programming/"authorization" cost, here it would be 1/2 to 1 hour labor.

If it fires up and plays, and sounds right, then check everything to be sure everything you have is enabled and working (fade, Nav, intercom, Etc.)... same cost as above if you need a dealer to set it up for your bike's configuration.
from all the research I’ve done MY2021 would be backwards compatible.

another thing I’ve come across is that the road glide unit has a different bezel then the street glide and has to be modified.
 
Reply
Old Aug 3, 2023 | 08:57 AM
  #4  
Ssitruc's Avatar
Ssitruc
Stellar HDF Member
5 Year Member
Liked
Loved
Community Favorite
Joined: Jun 2017
Posts: 2,325
Likes: 1,153
From: Oklahoma
Default

I agree, it should have the correct software already on it, I missed the part number in your first post... but with a "B" revision letter it should be good to go, software wise.

I too have heard there is a subtle difference in the bezels and that by crossing them up one way will result in a small gap (unless you do some "modifying"). But I can't remember crossing which one results in the gap, Street Glide GTS in a Road Glide or a Road Glide GTS in a Street Glide.
 
Reply
Old Aug 3, 2023 | 05:09 PM
  #5  
Hd589's Avatar
Hd589
Thread Starter
|
Tourer
5 Year Member
Liked
Loved
Community Favorite
Joined: Feb 2016
Posts: 349
Likes: 83
From: Florida
Default

Originally Posted by Ssitruc
I agree, it should have the correct software already on it, I missed the part number in your first post... but with a "B" revision letter it should be good to go, software wise.

I too have heard there is a subtle difference in the bezels and that by crossing them up one way will result in a small gap (unless you do some "modifying"). But I can't remember crossing which one results in the gap, Street Glide GTS in a Road Glide or a Road Glide GTS in a Street Glide.
Tested the unit first then installed earlier today, works perfect.
the road glide unit does leave a small gap which i could careless about but would be an easy fix to make it fit flush.







 
Reply
Old Aug 3, 2023 | 07:06 PM
  #6  
smitty901's Avatar
smitty901
Seasoned HDF Member
Veteran: Army
15 Year Member
Liked
Community Favorite
Joined: Feb 2008
Posts: 22,999
Likes: 11,439
Default

Now find someone with a Centurion and enable TPMS in BCM and IC. Then install the TPMS senors.
 
Reply
Old Aug 4, 2023 | 12:02 PM
  #7  
cycle7447's Avatar
cycle7447
Seasoned HDF Member
Veteran: Army
Community Influencer
Liked
Top Answer: 5
Joined: Jan 2005
Posts: 5,857
Likes: 2,506
From: Lake Orion, MI
Default

Glad it worked out for you.

You will enjoy the GTS
 
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
NHBAGGER
Audio Systems
11
Feb 6, 2022 09:47 PM
rochman
General Harley Davidson Chat
0
Dec 22, 2020 10:40 AM
Matty_d
Motorcycle Audio-Buy/Sell/Trade
0
Apr 14, 2018 07:51 PM
yooperhog
Audio Systems
0
May 7, 2016 10:28 AM
Mirnldi@gmail.com
Audio Systems
22
Sep 29, 2015 08:23 PM




All times are GMT -5. The time now is 02:36 PM.

story-0
7 Times Harley-Davidson Chucked Tradition Out the Window

Slideshow: Harley-Davidson built its reputation on nostalgia, but every so often, the company took a hard left turn into the future.

By Verdad Gallardo | 2026-05-20 11:18:19


VIEW MORE
story-1
7 Surprising Harley-Davidson Products that Are Not Motorcycles

Slideshow: The bar-and-shield logo shows up on far more than motorcycles, some of the company's most unexpected products have nothing to do with riding.

By Verdad Gallardo | 2026-04-29 16:50:35


VIEW MORE
story-2
8 Best Harley-Davidson Motorcycles Ever

Slideshow: Not every Harley gets it right, but these are the ones that genuinely earned their reputation.

By Pouria Savadkouei | 2026-04-15 14:23:21


VIEW MORE
story-3
10 Worst Harley-Davidson Motorcycles Ever

Slideshow: From the troubled AMF years to modern misfires, these bikes earned reputations for reliability issues, questionable engineering, or disappointing performance.

By Pouria Savadkouei | 2026-04-01 20:01:09


VIEW MORE
story-4
Killer Custom's Jail Break Is The Breakout That Refused to Blend In

Slideshow: Killer Custom's "Jail Breaker" build focuses more on stance and visual aggression than mechanical overhaul.

By Verdad Gallardo | 2026-03-18 19:20:32


VIEW MORE
story-5
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?

Slideshow: The Swiss custom shop has taken a Harley Softail and stretched it into something so long and low that it looks closer to a rolling sculpture than a conventional motorcycle.

By Verdad Gallardo | 2026-03-07 16:15:30


VIEW MORE
story-6
Harley-Davidson Reveals Super Cool Cafe Racer Concept

Slideshow: Harley-Davidson's new RMCR concept revives the café racer formula with modern hardware-and it may be exactly the reset the company needs.

By Verdad Gallardo | 2026-03-04 12:23:37


VIEW MORE
story-7
Engraved Rebellion: Inside Bundnerbike's Glam Rock II

Slideshow: A standard cruiser becomes an intricate metal canvas in the hands of a Swiss custom house known for pushing Harley-Davidson platforms far beyond their factory brief.

By Verdad Gallardo | 2026-02-24 18:19:44


VIEW MORE
story-8
10 Motorcycles You Should Never Buy

Slideshow: There is no shortage of great motorcycles to buy, but we would avoid these ten.

By Joe Kucinski | 2026-02-19 14:50:51


VIEW MORE
story-9
10 Things Harley-Davidson Needs to Fix in 2026

Slideshow: Harley-Davidson's challenges aren't abstract; they show up in dropping shipments, shrinking dealer traffic, and strategic decisions that aren't yet translating into growth.

By Verdad Gallardo | 2026-01-13 18:33:17


VIEW MORE