I just bought a 2000 tahoe with four wheel air (auto air ride shocks) I had a Yukon Denali before that.

The Tahoe is smooth as silk on the interstate but rides rough on rough roads while the Denali was smooth with Bilstiens shocks. Can this be adjusted or changed to ride smoother on rough roads?

Thats the great things about air bags. Just take out some air and presto, you've got a smooth suspension.

Its not that easy, this is a computer controlled automatic air system. Give me your vin and i will see what you have for a setup.

1GNEK13T2YJ170854

Thanks

Correct. They use a self leveling system that is controlled by computer based on the weight in the vehicle. Honestly, air bags are just bouncy off road, that is normal. I am not sure if there is a fix for this though. Some will still take coil overs though, that may help. The guys with the trailblazers used to do coilovers and possible something else to improve ride, but it's been so long, I honestly can't remember what it was.

you have the Z55 suspension. I cant find any service bullitens about it, that may just be the way that it rides. It hasnt had any waranty work done on the suspenson. Here is the history

VIN : 1GNEK13T2YJ170854
VEHICLE INFORMATION
Merchandising Model : CK15706 -2000 ALL NEW TAHOE 4WD Warranty Start Date : 05/16/2000
BARS Order Type : 70 - RETAIL - STOCK
Delivering Dealer : THE BOBB CHEVROLET COMPANY
PO BOX 06351
COLUMBUS , OH 43206-0351
(614) 228-4567
Selling Source : 13 - CHEVROLET
Site Code : 09063
Business Associate Code : 112754
Service Contract :

No

Branded Title :

No

Warranty Block :

No

PDI Status :

Paid
REQUIRED FIELD ACTIONS
Type

Number

Description

Posted Date

Status
RC
00084
REAR WHEELHOUSE PLUGS LOOSE OR MISSING ��
N/A

Closed
RC
00093
FRONT BRAKE PIPE CONTACT WITH BODY CROSS SILL ��
N/A

Closed
RC
01045
ONSTAR GLOBAL POSITIONING SYSTEM ��
N/A

Closed
RC
02039
REARWARD FOLDING HEAD RESTRAINTS PINCH POINT ��
N/A

Closed
RC
05068
FRONT WHEEL SPEED SENSOR CORROSION ��
N/A

Closed
SERVICE INFORMATIONAL ITEMS
Type

Number

Description

Posted Date

Status
SB

06048
ONSTAR H/W IS ANALOG ONLY-CANNOT BE UPGRADED TO DIGITAL-SEE TSB 06-08-46-007 ��
01/23/2007

See Bulletin
ON STAR AND XM SATELLITE RADIO INFORMATION
OnStar Equipped Yes OnStar Status Inactive Refer to Help page for details or:go to OnStar Online Enrollment (located on the "OnStar" tab in GM InfoNET) or (888)ONSTAR1 (888) 667-8271.
XM Equipped No XM Radio ID N/A XM Status N/A Refer to Help page for details or: www.xmradio.gm.ca or Dealer Hotline 1.877.GET.XMST (1-877-438-9677).
APPLICABLE WARRANTIES
Description

Effective Date

Effective Odometer

End Date

End Odometer
36/36000 BUMPER TO BUMPER
05/16/2000
5 miles
05/16/2003
36005 miles
72/100000 SHEET METAL COVERAGE RUST THROUGH
05/16/2000
5 miles
05/16/2006
100005 miles
96/80000 FEDERAL EMISSION CATALYTIC CONV. AND PCM
05/16/2000
5 miles
05/16/2008
80005 miles
36/36000 FEDERAL EMISSION
05/16/2000
5 miles
05/16/2003
36005 miles
CLAIM HISTORY
R.O Date

R.O Number

Type

Labor Operation

Odometer Reading
02/04/2006

A93064

#
Z8022 - ONSTAR - LOCKOUT 85000 miles
10/25/2005

389385

#
V1410 - 05068 - INSPECT WHEEL SENSOR (INC. CLEANING) 84581 miles
08/25/2004

404201

#
Z8022 - ONSTAR - LOCKOUT 67907 miles
04/24/2003

061267

#
V0894 - 02039 - INSTALL PROTECTIVE COVERS 47190 miles
07/26/2002

049580

#
K4123 - SWITCH, TRANSFER CASE SELECT - REPLACE 36462 miles
06/03/2002

047037

#
J5490 - BODY UNIT, THROTTLE - REPLACE 34193 miles
06/03/2002

047037

#
L1200 - FUEL TANK FUEL PUMP MODULE REPLACEMENT 34193 miles
06/03/2002

047037

#
E7700 - SHAFT, STEERING INTERMEDIATE - REPLACE 34193 miles
06/03/2002

047037

#
B2850 - CHANNEL, DRAIN - REPLACE 34193 miles
06/03/2002

047037

#
Z7901 - 1-DAY COURTESY TRANSPORTATION 34193 miles
01/03/2002

317862

#
V0744 - INSTALL & RECONFIGURE VIU 28040 miles
01/03/2002

317862

#
B4491 - LINK OR SPRING, REAR DOOR HOLD OPEN - LEFT - REPLACE 28040 miles
12/20/2001

317251

#
J9992 - CUSTOMER CONCERN NOT DUPLICATED 27314 miles
12/20/2001

317251

#
V0593 - INSPECT FOR LOOSE/MISSING PLUGS & INSTALL IF NECESSARY 27314 miles
12/20/2001

317251

#
V0609 - INSPECT BRAKE PIPE & INSTALL SPACER CLIP 27314 miles
12/20/2001

317251

#
Z7901 - 1-DAY COURTESY TRANSPORTATION 27314 miles
05/10/2000

A70854

I
Z7000 - PRE-DELIVERY INSPECTION - BASE TIME 0 miles

Also thought you might like this, Here is your build sheet. Explains all option codes.
VIN 1GNEK13T2YJ170854
VEHICLE BUILD
Merchandising Model : CK15706 -2000 ALL NEW TAHOE 4WD
Gross Vehicle Weight Rating : 3133 kg (6908 lb) Order Number : CHXDC7
Build Date : 05/10/2000 Build Plant : 1YJ06 - JANESVILLE ASSEMBLY PLANT
GMVIS is not the definitive source of GM Vehicle RPO information and is intended for service reference only. Should there be any questions about the vehicle's original build or RPO information please refer to the original vehicle invoice or window sticker.
OPTION CODES
#OS - ONSTAR SYSTEM AG1 - SIX-WAY POWER DRIVER SEAT
AG2 - SIX-WAY POWER PASSENGER SEAT AJ1 - DEEP TINTED GLASS
AN3 - FRONT BUCKETS WITH POWER ADJ. AS3 - CENTER AND REAR SEATS
AT5 - FOLDING CENTER SEAT AU0 - KEYLESS REMOTE DOOR LOCK AND TRUNK OPENER
AXP - MPV VIN IDENT POSITION A31 - POWER WINDOWS
BVE - SIDE RUNNINGBOARD STEPS B30 - WHEELHOUSING & FLOOR CARPETING
B35 - COLOR-KEYED REAR FLOOR MATS -CARPETED B58 - COLOR-KEYED FLOOR MATS, FRONT AND CENTER SEATS - CARPETED
B85 - BRIGHT BODY SIDE MOLDINGS CF5 - ELECTRIC SUNROOF
C25 - REAR WINDOW WIPER & WASHER C36 - REAR HEATER
C49 - ELECTRIC REAR WINDOW DEFOGGER C5H - 6900 LBS GVW RATING
C60 - AIR CONDITIONING C69 - AIR CONDITIONING-FRONT & REAR
DF5 - INT R/V MIRROR, LIGHT SENSITIVE W/OUTSIDE TEMP & COMPASS DH2 - LIGHTED LH & RH VISOR MIRRORS
DK8 - DELUXE OVERHEAD CONSOLE DR2 - MIRROR O/S LH & RH REMOTE CONT ELECTRIC,HEATED LT SENSITIVE, MANUAL FOLDING, COLOR
D07 - CUSTOM FRONT FLOOR CONSOLE EVA - EVAP EMISSION REQUIREMENT
E52 - LIFTGATE/LIFTGLASS FE9
FF6 - TORSION BAR SPRING ADJ. - LH FF7 - TORSION BAR SPRING ADJ. - RH
GT4 - REAR AXLE - 3.73 RATIO G69 - LEVEL CONTROL AUTO, AIR, HD
G80 - LOCKING DIFFERENTIAL-REAR AXLE JAN - ASSEMBLY PLANT-JANESVILLE,WIS.
JC5 - 4 WHEEL POWER DISC BRAKES KC5 - RECEPTACLE ELECTRICAL,ACCESSORY
KG8 - 130 AMP GENERATOR KNP - HD AUX TRANSMISSION COOLING SYS
K34 - ELECTRONIC SPEED CONTROL WITH RESUME SPEED K47 - HIGH CAPACITY AIR CLEANER
LM7 - VORTEC 5300 V8 SFI GAS ENGINE M30 - 4 SPEED ELECTRONIC AUTOMATIC TRANSMISSION WITH OVERDRIVE
NF2 - FEDERAL EMISSION SYSTEM NP5 - LEATHER WRAPPED STEERING WHEEL
NP8 - 2-SPEED ACTIVE TRANSFER CASE NZZ
PF4 - CAST ALUMINUM WHEELS QE4 - WHEEL SPARE 16 X 6.5, ALUMINUM
QGD - P265/75R16-114S ALT WOL TIRES R9I - CONTROL-SALES ITEM NO. 84
R9J - CONTROL-SALES ITEM NO. 85 SLM - STOCK ORDERS
SLT T96 - FRONT FOG LAMPS
UE1 - ONSTAR PROCESSING CODE UG1 - HOMELINK
UK6 - RADIO CONTROLS RR ST & EARPHONE UP0 - ETR AM/FM STEREO W/SEEK/SCAN, DIGITAL CLOCK, THEFT LOCK, SPEED COMPENSATED VOLUME, COMPACT DISC PLAYER, CASSETTE W/AUTO REVERSE AND AUTO TONE CONTROL (REPLACES RADIO IN STD/OPT PACKAGE)
UQ3 - ENHANCED AUDIO SPEAKERS UY7 - HD 7-LEAD TRAIL. WIRING HARNESS
VB3 - CHROMED REAR STEP BUMPER VG3 - FRONT DELUXE CHROMED BUMPER
VR4 - WEIGHT DISTRIB. PLATFORM HITCH VXS - COMPLETE VEHICLE LABEL
V22 - DELUXE FRONT APPEARANCE V54 - BLACK ROOF LUGGAGE CARRIER
V73 - STATEMENT OF VEHICLE CERT.-U.S. /CANADA XGD - P265/75R16-114S ALT WOL TIRES
X88 - CHEVROLET CONVERSION YD3 - BASE EQUIP FOR SCH GVW PL-FT AX
YD6 - BASE REAR SPRING YE9 - SILVERADO
YGD - P265/75R16-114S ALT WOL TIRES ZGD - P265/75R16-114S ALT WOL TIRES
ZM9 - SALES PACKAGE-COMFORT AND SECURITY ZY1 - SOLID PAINT
Z55 - CHASSIS PKG BI-STATE REAL TIME DAMPING Z82 - HEAVY DUTY TRAILERING EQUIPMENT
1SC - OPTION PACKAGE 03 1SZ - PREFERRED EQUIPMENT SAVINGS
11U - LT PEWTER METALLIC 12I - GRAPHITE INTERIOR TRIM
122 - GRAPHITE INTERIOR TRIM 6XK - COMP FRT LH COMPUTER SEL SUSP
7XK - COMPONENT FRT RH COMP. SEL SUSP

LOL it's great that you can look all that stuff up and then paste it onto the thread, but it doesn't really answer his question, in fact, it has nothing to do with his question.

Perhaps you can weed out the relevant information to help him out.

I tried to help.

you have the Z55 suspension. I cant find any service bullitens about it, that may just be the way that it rides.

The reason that i posted the rest is because it sounds like he just bough it and might be curious about what info he can get about it. In the future if i feel the desire to post on any of your threads i will refrain from saying anything that might be off topic. Sorry to irritate you

Sorry to irritate you
he wasn't trying to be mean :)

I tried to help.



The reason that i posted the rest is because it sounds like he just bough it and might be curious about what info he can get about it. In the future if i feel the desire to post on any of your threads i will refrain from saying anything that might be off topic. Sorry to irritate you

Sorry, I did not mean to come across so abrasive. You just posted alot of info, perhaps too much for most of us to go through and try and find the answer to his question. You obviously have alot of info at your finger tips, but chances are high that he doesn't know how to use the info you posted to help him answer the question.

Can you simply add something to help out? Perhaps explain his suspension and possible ways to solve his issue?

The RPO code for his suspension is Z55. Which is just a 3 digit code on his build sheet to describe some part of his vehicle. Just like he has a limited rear slip axle, I know that because the build sheet has a G80 code.

The Z55 suspension isnt something that i have much expierence with. its not a common option. It works the same as most other systems. It is a lot like almost any other system. On top of the rear shock tower is a sensor with a little rod that attaches to the rear axle to tell the position of the rear suspension. The front has a similar design on the control arm. That sends a signal to the suspension control module which is located over near your rear ac blower. there is a compressor on the frame rail in the middle of the vehicle on the passenger side. Having never driven one of these vehicles its a little hard to say what the ride is supposed to be like. The first step would be to determine if there is a leak, turn the key to the on positon but do not crank the engine, listen to the pump does it run for a very long time? If so check air lines, they go from the compressor to each shock absorber. Try to find someone else who has the same vehicle with the same suspension. see how that rides, if it does not have the Z55 suspension then comparing them would not do much good.

The RPO code for his suspension is Z55. Which is just a 3 digit code on his build sheet to describe some part of his vehicle. Just like he has a limited rear slip axle, I know that because the build sheet has a G80 code.

The Z55 suspension isnt something that i have much expierence with. its not a common option. It works the same as most other systems. It is a lot like almost any other system. On top of the rear shock tower is a sensor with a little rod that attaches to the rear axle to tell the position of the rear suspension. The front has a similar design on the control arm. That sends a signal to the suspension control module which is located over near your rear ac blower. there is a compressor on the frame rail in the middle of the vehicle on the passenger side. Having never driven one of these vehicles its a little hard to say what the ride is supposed to be like. The first step would be to determine if there is a leak, turn the key to the on positon but do not crank the engine, listen to the pump does it run for a very long time? If so check air lines, they go from the compressor to each shock absorber. Try to find someone else who has the same vehicle with the same suspension. see how that rides, if it does not have the Z55 suspension then comparing them would not do much good.

Now THAT is an excellent reply!! :thumbsup: Very informative

One thing i forgot is that this rear suspension has coil springs on the rear axle instead of the standard equipment leaf springs. Still got the same old torsion bars in the front.

Thanks for the info there does not seem to be an air leak. Matbe there is an after market shock that will replace these if we decide the ride is too hard. AS I mentioned earlier it is very smooth on the interstate.

Thanks

If you do aftermarket shocks then you have to get the active ones that work with your system, or get all four passive. You cannot put two passive ones on.