11-06-2004, 07:27 PM
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#1
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Registered User
Join Date: Nov 2001
Location: Santa Clara, CA
Age: 30
Posts: 8,040
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1995 to 1998/99/00 OLD Body Style Instrument Cluster Information...
Seems there are a lot of threads about the OBS clusters, what can be done to change them, and what the difference are between them. I've had this on my website for a while but not too many know about it so I'll post everything here. Hopefully this can be made a sticky for the interior forum. I may even do a info faq for the NBS clusters if the interest is there. I will also add any info that may come up that would be a good addition to this info post.
I WILL BE ADDING A TECH FEATURE ON HOW TO SWAP YOUR STOCK ODOMETER INTO ANOTHER CLUSTER YOU WANT TO INSTALL IN YOUR 95+ OBS TRUCK.
Below is a picture of the common 100 mph cluster found in a majority of 95-98/99/00 OBS GM trucks and suv's...
(picture credit to James B.)
Below is a picture of the 120 mph cluster found in 99/00 OBS Escalade, Denali, and Tahoe Limited suv's...

(note the stock clear needles!)(picture credit to James B.)
Last but not least, here is a pic of the 130 mph Special Edition Police Tahoe Cluster..

(picture credit to James B.)
The sweep on the 100 mph cluster and the sweep on the 120 mph cluster are the same. These are interchangeable and require no modifications for proper function and speed readings. However, the Police Cluster is a different story. Here is a pic of the 130 mph sweep versus the 100/120 mph sweep...
(picture credit to James B.)
The Police Cluster can be identified in a few other ways besides the 130 mph sweep. The Police cluster has an identification on the printed circuit and also has a unique circuit board specific to these clusters. No other stock OBS cluster have this and to run this cluster this board requires wiring and calibration. Boosted Z-71 has accomplished this swap and he has informed me of how to do it. You can read his information below.
The cluster is a straight bolt in except in the case of the speedometer function. You'll need to use a Dakota Digital signal modifier to take the stock speed signal and modify it AFTER it went through the ECM and out on its way to the speedo. You'll also have to shield the wires really well at the signal box and all connections or you get some RF interference that causes the speedo needle to jump at times. Some have recommended splicing into the speed sensor wires at the tranny. Do not do this! You talk about messed up shift points, that will give it to you. By modifying the signal after the ECM and on its way out to the speedometer you get transmission shift functions that stay normal and the ALDL scanner data is also correct. All you need is a scan tool and keep adjusting the Dakota Digital box to match your needle to your ground speed on the Scanner. Mine is accurate to within less than 1 mph, from 0-130. The only other way to do this is change the reluctor in the tranny & GM would not sell the police pacage reluctor to me without trading in a similar unit.

(picture credit to James B.)
(picture credit to James B.)
Like I mentioned earlier, the 120 mph clusters found in 99/00 Escalades, Denali's, and Tahoe Limited suv's can be a drop in replacement upgrade for the standard 100 mph clusters found in 95% of OBS GM trucks from 95-98/99/00. As you can see the cluster backlighting is a teal color versus the green backlighting found on the stock cluster. Just another subtle difference along with the clear needles.
Cameron
__________________

"The power of accurate observation is frequently called cynacism by those
who don't have it." - George Bernard Shaw
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11-06-2004, 07:30 PM
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#2
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The DuPont Guy
Join Date: Aug 2002
Location: Warner Robins, Georgia
Age: 25
Posts: 5,525
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Re: 1995 to 1998/99/00 Instrument Cluster Information...
 article cam
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"In our darkest hour...we look to the sky. With a silent prayer...BELIEVE God's on our side. In the land where FREEDOM reigns...and where eagles fly."
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11-10-2004, 09:49 AM
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#3
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Smoke Eater
Join Date: Jun 2001
Location: Austin, Texas
Age: 38
Posts: 12,647
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Re: 1995 to 1998/99/00 Instrument Cluster Information...
this article has been added to FSCU!
Thanks Cam!
http://www.fullsizechevy.com/fscu/
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11-10-2004, 02:04 PM
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#4
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Registered User
Join Date: Nov 2001
Location: Santa Clara, CA
Age: 30
Posts: 8,040
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Re: 1995 to 1998/99/00 Instrument Cluster Information...
Cameron
__________________

"The power of accurate observation is frequently called cynacism by those
who don't have it." - George Bernard Shaw
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11-10-2004, 07:13 PM
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#5
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Registered User
Join Date: Dec 2003
Location: San Antonio
Posts: 281
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Re: 1995 to 1998/99/00 Instrument Cluster Information...
The OBS Escalade/Denali/Tahoe Limited clusters are almost impossible to find, right? Can you purchase one from the dealership?
__________________
1996 GMC Sierra RCSB
4.3L - 4L60E - 3.42s
CAF Racing
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11-19-2004, 04:51 PM
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#6
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Guest
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Re: 1995 to 1998/99/00 Instrument Cluster Information...
Here is another OBS Cluster.
Note this cluster is made for trucks with real transmissions
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11-19-2004, 04:52 PM
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#7
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Guest
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Re: 1995 to 1998/99/00 Instrument Cluster Information...
Quote:
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Originally Posted by Ross
The OBS Escalade/Denali/Tahoe Limited clusters are almost impossible to find, right? Can you purchase one from the dealership?
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I asked a friend of mine who works at a local dealership he said that they cost mucho $$$$, but they can get them in.
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11-19-2004, 05:01 PM
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#8
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Registered User
Join Date: Nov 2001
Location: Santa Clara, CA
Age: 30
Posts: 8,040
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Re: 1995 to 1998/99/00 Instrument Cluster Information...
Quote:
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Originally Posted by Ryan98948
Here is another OBS Cluster.
Note this cluster is made for trucks with real transmissions

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How is that one any different...looks like a stock cluster like I have posted. What do you mean by "Note this cluster is made for trucks with real transmissions".
Cameron
__________________

"The power of accurate observation is frequently called cynacism by those
who don't have it." - George Bernard Shaw
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11-19-2004, 05:02 PM
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#9
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Registered User
Join Date: Nov 2001
Location: Santa Clara, CA
Age: 30
Posts: 8,040
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Re: 1995 to 1998/99/00 Instrument Cluster Information...
Quote:
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Originally Posted by Ryan98948
I asked a friend of mine who works at a local dealership he said that they cost mucho $$$$, but they can get them in.
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GM discontinued production on them but some are still in wherehouses and in dealers. If you can find them and want them they will cost a good amount.
Cameron
__________________

"The power of accurate observation is frequently called cynacism by those
who don't have it." - George Bernard Shaw
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11-19-2004, 05:21 PM
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#10
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Registered User
Join Date: Oct 2003
Location: Fort Worth, TX
Age: 26
Posts: 1,491
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Re: 1995 to 1998/99/00 Instrument Cluster Information...
that cluster is for the Standard tranny, which some people call "real transmissions"
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-Alex
Cadillac CTS - the daily
95 k1500 Suburban - the toy
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02-17-2005, 11:25 AM
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#11
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Full Sized Style
Join Date: Feb 2005
Location: Germany, near Frankfurt
Posts: 173
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Re: 1995 to 1998/99/00 Instrument Cluster Information...
Quote:
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Originally Posted by LS6TT
that cluster is for the Standard tranny, which some people call "real transmissions"
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And what is the difference in the cluster?
__________________
97 K1500 Extended Cab, Short Bed, 5.7L Green/Tan Paint, Cloth Interior, TM and Speed Limit Removed, Tinted, Borla Cat-Back, Granatelli MAF, MSD coil, K&N Filter, Remote Start w/ Window Control
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02-17-2005, 11:43 AM
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#12
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Dirty, Baraka, "B"
Join Date: Apr 2002
Location: Thomasville, GA
Age: 26
Posts: 4,678
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Re: 1995 to 1998/99/00 Instrument Cluster Information...
man I wish someone on this forum (physh) would have one that I could buy off him! hehe...seriously I need to find one of those for my tahoe and swap in some blue leds.
__________________
2004 Chevy Tahoe LT
BB Tune|CB Extreme|6K HID's|Spectre CAI|Tint|Ford Keys|2" Spacers|RC 9000X shocks
Painted grill & dash bezel|clear corners|billet grill
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02-17-2005, 11:54 AM
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#13
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Full Sized Style
Join Date: Feb 2005
Location: Germany, near Frankfurt
Posts: 173
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Re: 1995 to 1998/99/00 Instrument Cluster Information...
Yea, I would love to have a 130mph speedo.
__________________
97 K1500 Extended Cab, Short Bed, 5.7L Green/Tan Paint, Cloth Interior, TM and Speed Limit Removed, Tinted, Borla Cat-Back, Granatelli MAF, MSD coil, K&N Filter, Remote Start w/ Window Control
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02-18-2005, 10:02 AM
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#14
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Registered User
Join Date: Feb 2005
Location: N.E.MO
Posts: 103
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Re: 1995 to 1998/99/00 Instrument Cluster Information...
Quote:
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Originally Posted by Physh1
GM discontinued production on them but some are still in wherehouses and in dealers. If you can find them and want them they will cost a good amount.
Cameron
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Just curious, If a person found a used Denali 120mph version, How much could he expect to spend?
I just noticed the 120mph version is the only one that has a redline.
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02-25-2005, 05:41 PM
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#15
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Whippled
Join Date: Apr 2004
Location: Fremont, CA
Age: 27
Posts: 367
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Re: 1995 to 1998/99/00 Instrument Cluster Information...
If anyone have been looking for an esky cluster for OBS, found one on ebay:
http://cgi.ebay.com/ebaymotors/ws/eB...spagename=WDVW
__________________
1999 2Dr Tahoe 4x4 - 5.7L L31 Marine intake w/39lbers, Whippled@8.5psi, A2W Intercooler, Alky, Tunercat, LTs, FLT 4L60E, PI 2800, Belltech drop, MSD6A, Dual 3" x-piped, 9.5" 14bolt w/4.10s & Auburn, hotchkis, efans
13.911@96.516 mph
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02-25-2005, 05:57 PM
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#16
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formerly joker198268
Join Date: Jan 2005
Location: washington
Age: 27
Posts: 70
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Re: 1995 to 1998/99/00 Instrument Cluster Information...
Quote:
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Originally Posted by Williamts99
And what is the difference in the cluster?
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nothing really different in the cluster other then it doesn't have the gear indicator at the bottom of the speedo.....
i have a '96 silvy ecsb and mine came stock with the 120 mph speedo......guess i just got lucky......
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02-25-2005, 07:10 PM
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#17
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Registered User
Join Date: Feb 2005
Location: N.E.MO
Posts: 103
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Re: 1995 to 1998/99/00 Instrument Cluster Information...
Here's one can be bought for a one hundred dollar bill plus shipping!
PM me....
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03-24-2005, 11:33 AM
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#18
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Registered User
Join Date: Nov 2003
Location: Amboy, IL
Age: 25
Posts: 271
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Re: 1995 to 1998/99/00 Instrument Cluster Information...
what about the '95 cluster that only goes to 5 grand on the tach? orange line at 4000 and red line at 4500
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'95 K1500 Z71, 350 tbi, 4l60e, 3.73 gears
K&N 14x4, spiral bore tb spacer, injector pod spacer, 3" cat-back duals,
180* stat, MSD ignition, Transgo Shift Kit, Vette Servo, Jet Billet OD Servo
Kenwood Excelon head unit and highs, JL Audio dual 8W1s in Stealthbox
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03-24-2005, 01:23 PM
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#19
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Registered User
Join Date: Nov 2001
Location: Santa Clara, CA
Age: 30
Posts: 8,040
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Re: 1995 to 1998/99/00 Instrument Cluster Information...
Besides the lower redline on the tach there are zero differences that I have found.
Cameron
__________________

"The power of accurate observation is frequently called cynacism by those
who don't have it." - George Bernard Shaw
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03-24-2005, 01:54 PM
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#20
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Registered User
Join Date: Nov 2003
Location: bronx
Posts: 744
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Re: 1995 to 1998/99/00 Instrument Cluster Information...
Quote:
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Originally Posted by Physh1
Besides the lower redline on the tach there are zero differences that I have found.
Cameron
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The range is different too, not just the "red line."
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