This page is a tribute to Suburban… the original SUV.
It was introduced in 1935 and is the oldest, continuously produced vehicle nameplate in the industry. There are many configurations and styles but my Suburban Seats 8 passengers including the driver however, you can order a 9 passenger (bench in the front) vehicle in case your family is a soccer team!

Mine is Black on Black with Leather interior:



Rebuilt Transmission after a massive failure.  DEAD Tranny.

Added a Corsa cold air intake with a Dry Donaldson Powercore Air filter.




My particular model is a 4 Wheel Drive powered by a  5.3L V-8 VVT DI  with Active Fuel Management (L83)  mated to a GM 6L80 transmission. Together these allow Suburban to produce 355 HP with 383 Ft/lbs of Torque.

The 2017 Suburban replaces the LTZ trim level name with Premier — Chevy’s new range-topping trim. But the change is in name only, as the new Premier trim level inherits all of the features, equipment, and options from the Suburban LTZ, without becoming any more premier premium. In addition, the 2017 Suburban gets rid of the LS badge from the exterior of LS-trim vehicles.

On the outside, the 2017 Chevrolet Suburban doesn’t see any styling changes or updates with the exception of new colors, wheels, (aforementioned) badges and roof rails:

Deleted Colors:

  • Slate Grey Metallic
  • Sable Metallic
  • Green Envy Metallic
  • Brownstone Metallic

New Colors:

  • Blue Velvet Metallic
  • Pepperdust Metallic

Two new 22-inch wheel choices are added to the 2017 Chevy Suburban lineup:

  • 22-inch Ultra Bright machined aluminum wheels with Bright Silver finish available exclusively on the Premier (1LZ) trim
  • 22-inch, 7-spoke Silver wheels with Chrome inserts available on all trims

Another set of 22-inch premium painted wheels with chrome inserts become available on 1LT (LT) and 1LZ (Premium) trim levels of the 2017 Suburban, but they will not be available at the start of production.

In addition, black roof rack cross rails are added to the Texas Edition Package and All-Season Package and front active aero shutters are incorporated as a standard feature across all trim levels of the 2017 Suburban. The shutters are designed to improve aerodynamics by closing automatically during high-speed driving and opening when the engine needs more air for cooling purposes. To note, the active shutters are not visible from the outside of the vehicle.

The remaining updates and changes to the 2017 Suburban are to its in-vehicle technology:

  • The heated and cooled seats are replaced with heated and vented seats on the Premier (1LZ) trim level
  • The MyLink infotainment systems (IO5 and IO6) gets these new features and changes:
    • Pandora is removed as an embedded app
    • Teen Driver feature is added
    • App Shop is added
    • Rear Seat Reminder customization added
    • Low Speed Forward Automatic Braking is included with Enhanced Driver Alert Package on the 1LS trim. The feature is standard on LT (1LT) and on Premier (1LZ) trim levels when Adaptive Cruise Control is not ordered.
  • The Rear Seat Entertainment System is overhauled:
    • RCA audio/video jacks and SD card slot are removed
    • New video voiceover feature for the visually and hearing impaired
    • HDMI/MHL connector added to attach devices to project on the in-vehicle screens
    • Digital headphones added, while the previous rear seat accessory headphones are deleted
    • The in-vehicle Wi-Fi system now allows devices to wirelessly project onto the vehicle’s screens using Digital Living Network Alliance (DLNA) technology. Only one device can wirelessly project at a time.
    • 2nd USB port with capability of charging up to 2.1-amp (such as for an Apple iPad) is added to the back of console



Following are GM’s official RPO-level changes to the 2017 Chevy Suburban:


  • (G1C) Slate Grey Metallic exterior color
  • (G7U) Sable Metallic exterior color
  • (GC8) Green Envy Metallic exterior color
  • (GWX) Brownstone Metallic exterior color
  • (S1V) LPO, Rear seat headphones
  • RCA audio/video jacks and SD card slot when equipped with (U42) rear sear entertainment system
  • Pandora removed as an embedded app within the (IO5) and (IO6) audio systems

New Features

  • (G1M) Blue Velvet Metallic exterior color
  • (GMU) Pepperdust Metallic exterior color
  • (UHY) Low Speed Forward Automatic Braking. Included with (PCW) Enhanced Driver Alert Package on 1LS; standard on 1LT and on 1LZ when (Y66) Adaptive Cruise Control is not ordered
  • (SIY) 22″ Ultra Bright machined aluminum wheels with Bright Silver finish (available on 1LZ)
  • (RXN) LPO, 22″ 7-spoke Silver wheels with Chrome inserts (available on all trims)
  • (TDM) Teen Driver enabled on (IO5) and (IO6) audio systems
  • If equipped with (U42) rear seat entertainment system, new video voiceover feature to benefit the visually and hearing impaired
  • Front active aero shutters (standard on all trims)


  • “Premier” badge replaces “LTZ” badge
  • “LS” badge removed from exterior of LS trim
  • (KQV) Heat/vented seats replace (KB6) heated/cooled seats on 1LZ trim
  • (IO5) and (IO6) audio systems add Shop and Rear Seat Reminder customization
  • (U42) Rear Seat Entertainment upgrades, adding:
    • HDMI/MHL connector to attach devices to project on the in-vehicle screens
    • Digital headphones
    • Wi-Fi allows devices to wirelessly project onto their vehicle screens on the in-vehicle screens through Digital Living Network Alliance (DLNA) (can only wirelessly project from one device at a time)
    • 2nd USB on back of console, with capability of charging up to 2.1-amp for an iPad
  • MyLink start up animation change on (IO5) and (IO6) audio system screen
  • (SGF) 22″ premium painted wheels with Chrome inserts now available on 1LT and 1LZ (not available at Start of Production)
  • (PDA) Texas Edition Package and (PDP) All-Season Package now also includes (VQQ) Black roof rack cross rails, LPO.



My personal upgrades include:

Pedal Commander  – This is a throttle response controller. Basically what it does is allows you to remove throttle body response delays on your electronic accelerator pedal. Effectively, it allows your engine to respond faster so your car can accelerate faster! It also has the reverse effect in ECO-Mode.

Eco-Mode allows you to save a lot on gas.  I can get 18 l/100km driving in ECO-Mode where normally I would be getting 22 l/100 km in the city. Unbelievably, I have had it as low as 11 l/100 km on the hwy.
Update:: Removed Pedal Commander – caused me some throttle body calibration issues – got sick of having to pull over and re-start my truck…

My Winter tires are  BFGoodrich All-Terrain T/A® KO2 Tire
The BF’s are amazing tires but a little too noisy for me for daily driving. So I use them for Winter only…or if I decide to go offroading….which never happens lol..

These are my Summer /. All Season tires….Awesome when its dry and in the rain and snow – Fantastic tire.

Michelin Defender® LTX® M/S

Michelin Defender® LTX® M/S

Size 265/65R18
Part 56465
Category All Season
Season All Season
Speed rating T 190km
Load index 114
Warranty 115000 km
UTQG 800 A A
Evertread™ technology helps the Michelin® Defender™ LTX™ M/S™ last 10% longer in severe conditions than the Michelin® LTX™ M/S™2*. (*Based on third-party tread wear tests using the Michelin® Defender® LTX™ M/S™ tire versus Michelin® LTX™ M/S™2 tire using size LT265/70R17 121/118R tires. Actual on-road results may vary.)
Improved Tread Life in Severe Conditions
On wet pavement, the Michelin® Defender™ LTX™ M/S™ tire stops up to 10 m shorter than 3 leading competitive tires.
All-Season* Confidence (*While all-season tires are designed to provide reliable performance in moderate winter conditions, the use of four winter tires is recommended for optimal performance and may be mandatory in certain jurisdictions.)
MaxTouch Construction™ helps the Michelin® Defender™ LTX™ M/S™ save you up to 250 litres of fuel over the life of the tire, compared to a leading competitive tire.

Great Tires low noise and so far so good in snow and rain.
I got my tires at Superior Tire and Auto! Very knowledgeable – best deal in town guaranteed.

Superior Tire & Auto has 11 locations throughout Ontario to keep your vehicle reliable. They offer a huge selection of brand name and private label tires all covered by a Superior Price Guarantee.
Warranty approved vehicle maintenance and repair is also available!

Call Danny at
Ph: 416-291-7175
Fax: 416-291-9302


Superior Tire & Auto

Monday: 8:00 AM – 6:00 PM
Tuesday: 8:00 AM – 6:00 PM
Wednesday: 8:00 AM – 6:00 PM
Thursday: 8:00 AM – 6:00 PM
Friday: 8:00 AM – 6:00 PM
Saturday: 8:00 AM – 2:00 PM
Sunday: Closed



Leveling Kit

I got my Leveling Kit installed at Birchmount Spring here in Scarborough Ontario.
These guys are rock solid – Quality Performance suspension work. They know what they are doing and are reasonably priced.

They did my truck in about an hour – Just Awesome.

GM 2in Leveling Lift Kit [1307]

Run up to a 32-inch tire while leveling the front of your vehicle with the rear, using Rough Country’s 2-inch Leveling Suspension Kit for Chevy / GMC 1500’s .
This set of lower front strut mount extensions immediately offers increased ground clearance without the hassle of a long and drawn out installation process.


F5 Flashpaq for 2017-2020 GM vehicles – 2847

The GM Flashpaq performance programmer (PN 2847) for 2017-2019 (Legacy Body Style trucks only)gas vehicles includes tunes engineered with the daily driver, heavy tower, and enthusiast in mind. With various power levels from performance, tow, to economy, the Flashpaq tuner for GM sends instant power to your gas Chevy Silverado, GMC Sierra, or your Camaro in just minutes. Enjoy a 2-year powertrain warranty and results that won’t disappoint. The GM Flashpaq coverage is extensive and includes the most sought-after applications, features, and power improvements for your Chevy or GMC truck, SUV, or car. Configure your vehicle today and shop for your 2017-2019 (Legacy Body Style trucks only) GM gas vehicle today to experience a driving experience unlike any other.

*Note 2019 GM Coverage only available on 5.3L 6-speed legacy body style trucks* This SKU is specifically designed for2017-2019 (Legacy Body Style trucks only) GM gas vehicles only!*

*E-assist and hybrid vehicles not supported*


Key Product Features

High-definition, 2.8″ color screen
Redesigned graphic interface for improved user experience
Increased memory with faster processor for improved tuning & updating speed
Performance tuning for Economy, Towing, Daily Driving, & Extreme Tuning
Eliminate downshifting when climbing hills
Speedometer correction for changes in tire size and gear ratio*
Adjust speed & rev limiters*
Tuning for shift points, shift firmness, & TQ management*
Internet updateable with all-new update software via USB
Active fuel management control*
Vehicle parameter monitoring capabilities
Read & clear diagnostic trouble codes
Compatible with other performance upgrades
2-year powertrain warranty

*Features may vary based on year, make, & model.
**Incomplete/Cab and chassis trucks not supported**

50 State Legal, 2016-2019 gas applications pending

  • Color Screen
  • Speedometer Correction
  • Tire Size – 26^ – 38^
  • Axle Gear Ratio – Stock – 5.18
  • Shift Points
  • Shift Firmness
  • Speed Limiter
  • Rev Limiter
  • Transmission Tuning
  • Data Acquisition – Advanced + PIDS
  • DTC Read & Clear
  • Internet Updateable
  • Performance 16HP 20TQ
  • Tow 10HP 15TQ
  • Economy 8HP 10TQ




Maybe Soon to Come:


Below this point are all TECH SPECS for the gear heads

Click here for a full PDF with specs:

VEHICLE CLASS: Sport-Utility Vehicle

NEW FOR 2017

  • Standard Teen Driver feature. It encourages safe driving habits with teenagers, enabling parents to view the vehicle’s maximum speed, distance driven and the number of times active safety features were engaged during a drive
  • Premier trim replaces LTZ
  • Perforated, leather-trimmed heated and vented driver and passenger seats are standard on Premier
  • Available rear seat entertainment system upgrades that include HDMI/MHL connector, additional USB port, digital headphones and device projection; new video voiceover feature benefits visually and hearing impaired
  • Chevrolet MyLink adds in-vehicle shopping apps
  • Available Low Speed Forward Automatic Braking
  • Front active aero shutters enhance aerodynamics on the highway
  • New 22-inch wheel design available on Premier
  • Exterior colours: Blue Velvet Metallic and Pepperdust Metallic


  • Offered in LS, LT and Premier models, in 2WD and 4WD configurations.
  • A standard 5.3L V-8 engine with direct injection and Active Fuel Management provides 355 horsepower and segment-leading fuel efficiency: 10.4 L/100km highway
  • 4G LTE connectivity with Wi-Fi hotspot (includes three-month/3G data trial)
  • Fold-flat second- and third-row seats that enhance cargo convenience – including an available power-folding feature
  • Available hands-free power liftgate
  • Available eight-inch colour touchscreen radio with next-generation MyLink connectivity
  • Up to seven USB ports and six power outlets – including a 110-volt three-prong outlet –  to support electronic devices of all kinds (up to 13 charging locations)
  • Available driver information centre on Premier with 8-inch-diagonal configurable, colour display; package also includes head-up display
  • Conversation mirror in the overhead console that provides a panoramic view of the rear seats
  • Keyless entry and push-button start are available
  • Standard remote start
  • Available wireless charging


  • Standard front and side-impact air bags for driver and front passenger with front-centre air bag and head curtain side-impact air bags for all rows
  • Forward Collision Alert, Safety Alert Driver Seat, IntelliBeam headlamps with automatic high-beam control, Lane Keep Assist and Low Speed Forward Automatic Braking are standard on LT and Premier. They are included on LS with the available Enhanced Driver Alert Package
  • Side Blind Zone Alert with Lane Change Alert and Rear Cross-Traffic Alert are standard on Premier and available on LT
  • Standard rear-vision camera
  • Adaptive Cruise Control with Front Automatic Braking is available on Premier






Additional Info

General Information

MFR Model Code


Body Type

Sport Utility

Pass Doors


Alternative Name

4WD 1500 LT

Alternative Body

Sport Utility


Four Wheel Drive

Original Pricing





Destination Charge


Engine & Powertrain


8 Cylinder Engine

Displacement L/CI


Fuel Type

Gasoline Fuel


355.0 @ 5600

Fuel Economy

15.0 City / 22.0 Highway MPG

Fuel Capacity

31.0 gal

Net Torque

383.0 @ 4100

Tech Specs

Manufactured By

United States Chevrolet Active MPV

Suspension Type – Front


Suspension Type – Rear


Front Tire Size

P265/65R18, P285/45R22, P275/55R20, P275/55R20, P265/65R18

Rear Tire Size

P265/65R18, P285/45R22, P275/55R20, P275/55R20, P265/65R18

Brake ABS System



130.00  in  130.0 min 130.0 max

Ground Clearance, Front

7.91  in  7.91 min 7.91 max

Ground Clearance, Rear

7.91  in  7.91 min 7.91 max




StyleTrimMSRP / Invoice

4WD 4dr 1500 LT


$58,155.00 / $54,665.71



Mechanical & Powertrain

Rear axle, 3.08 ratio (Not available with (NHT) Max Trailering Package.)

Suspension Package, Premium Smooth Ride (Not available with (NHT) Max Trailering Package.)

Transfer case, active, single-speed, electronic Autotrac with rotary controls, does not include neutral. Cannot be dinghy towed (Requires 4WD model. Not available with (NHT) Max Trailering Package.)

Differential, heavy-duty locking rear

4-wheel drive

Cooling, external engine oil cooler, heavy-duty air-to-oil integral to driver side of radiator

Cooling, auxiliary transmission oil cooler, heavy-duty air-to-oil

Battery, 720 cold cranking amps with 80 amp hour rating

Alternator, 150 amps

Trailer sway control

GVWR, 7500 lbs. (3402 kg) (Requires 4WD model.)

Suspension, front coil-over-shock with stabilizer bar

Suspension, rear multi-link with coil springs

Hill Start Assist

Steering, power


Daytime Running Lamps, with automatic exterior lamp control

Teen Driver mode a configurable feature that lets you activate customizable vehicle settings associated with a key fob, to encourage safe driving behavior. It can limit certain vehicle features, and it prevents certain safety systems from being turned off. An in-vehicle report gives you information on your teen’s driving habits and helps you to continue to coach your new driver

Airbags, Frontal airbags for driver and front outboard passenger; Seat-mounted side-impact airbags for driver and front outboard passenger; Driver inboard seat-mounted side-impact airbag; Head-curtain airbags for all rows in outboard seating positions (Always use safety belts and child restraints. Children are safer when properly secured in a rear seat in the appropriate child restraint. See the Owner’s Manual for more information.)

Front outboard Passenger Sensing System for frontal outboard passenger airbag (Always use safety belts and child restraints. Children are safer when properly secured in a rear seat in the appropriate child restraint. See the Owner’s Manual for more information.)

Rear Vision Camera

Forward Collision Alert sensor indicator

Safety Alert Driver Seat

Door locks, rear child security

LATCH system (Lower Anchors and Top tethers for Children), for child safety seats lower anchors and top tethers located in all second row seating positions, top tethers located in third row seating positions

Tire Pressure Monitor System air pressure sensors in each tire with pressure display in Driver Information Center

Warning tones headlamp on, key-in-ignition, driver and right-front passenger safety belt unfasten and turn signal on


Seat, third row manual 60/40 split-folding bench, fold flat (Not included when (PCK) Luxury Package or (PDA) Texas Edition Package are ordered.)

Floor covering, color-keyed carpeting

Driver Information Center, enhanced, 8″ diagonal multi-color configurable display

Remote vehicle start

Universal Home Remote includes garage door opener, programmable

Pedals, power-adjustable for accelerator and brake

Windows, power, with Express-Down and Express-Up on front doors and lock out features

Climate control, tri-zone automatic with individual climate settings for driver, right-front passenger and rear passengers

Defogger, rear-window electric

Power outlet, 110-volt

Power outlets, 5 auxiliary, 12-volt includes outlets in the instrument panel, console, back of console, 1 in 3rd row and 1 in cargo area

Mirror, inside rearview auto-dimming

Conversation mirror (Deleted when (UTT) Theft Protection Package is ordered.)

Assist handles, 1st row passenger and 2nd row outboard seats

Lighting, interior with dome light, driver- and passenger-side door switch with delayed entry feature, cargo lights, door handle or Remote Keyless Entry-activated illuminated entry and map lights in front and second seat positions

Cargo management system

Cargo net

OnStar Basic plan for 5 years includes limited vehicle mobile app features, Monthly Diagnostics Report and Dealer Maintenance Notification (Basic Plan available for 5 years from the date of vehicle delivery and is transferable. Does not include Emergency, Security or Navigation services.)


Tire carrier, lockable outside spare, winch-type mounted under frame at rear

Active aero shutters, front

Fascia, front body-color

Fascia, rear body-color ((PCK) Luxury Package and (PDA) Texas Edition Package includes trailer hitch close out.)

Luggage rack side rails, roof-mounted

Headlamps, IntelliBeam, automatic high beam on/off

Glass, deep-tinted

Glass, acoustic, laminated

Windshield, solar absorbing

Wipers, front intermittent, Rainsense

Wiper, rear intermittent with washer




Exterior ColorsGeneric NameCode

Black Currant Metallic






Blue Velvet Metallic



Champagne Silver Metallic



Iridescent Pearl Tricoat



Pepperdust Metallic



Silver Ice Metallic



Siren Red Tintcoat



Special Paint



Summit White



Tungsten Metallic



Interior ColorsCode



Jet Black/Dark Ash


Jet Black





Tech Specs

Vehicle Name

Chevrolet Suburban

Body Style

Sport Utility Vehicle

Body Code



Four Wheel Drive

Passenger Capacity

7, 8    7.0 min 8.0 max

Gross Axle Wt Rating – Front

3600  lbs  3600.0 min 3600.0 max

Gross Axle Wt Rating – Rear

4200  lbs  4200.0 min 4200.0 max

Gross Vehicle Weight Rating Cap

7500  lbs  7500.0 min 7500.0 max

Fuel Economy Est-Combined

18  MPG  18.0 min 18.0 max

EPA Fuel Economy Est – City

15  MPG  15.0 min 15.0 max

EPA Fuel Economy Est – Hwy

22  MPG  22.0 min 22.0 max

Tons/yr of CO2 Emissions @ 15K mi/year

9.8    9.8 min 9.8 max

Dead Weight Hitch – Max Trailer Wt.

5000  lbs  5000.0 min 5000.0 max

Dead Weight Hitch – Max Tongue Wt.

500  lbs  500.0 min 500.0 max

Wt Distributing Hitch – Max Trailer Wt.

8000, 6000  lbs  6000.0 min 8000.0 max

Wt Distributing Hitch – Max Tongue Wt.

800, 600  lbs  600.0 min 800.0 max

Engine Order Code


Engine Type

Gas/Ethanol V8

Fuel System

Direct Injection

SAE Net Horsepower @ RPM

355 @ 5600

SAE Net Torque @ RPM

383 @ 4100

Trans Order Code


Trans Type

6    6.0 min 6.0 max

Trans Description Cont.


Transfer Case Model


Cold Cranking Amps @ 0° F (Primary)

720    720.0 min 720.0 max

Maximum Alternator Capacity (amps)

150    150.0 min 150.0 max

Suspension Type – Front


Suspension Type – Rear


Axle Type – Front


Axle Type – Rear


Axle Capacity – Front

3600  lbs  3600.0 min 3600.0 max

Axle Ratio (:1) – Front

3.42, 3.08    3.08 min 3.42 max

Axle Ratio (:1) – Rear

3.42, 3.08    3.08 min 3.42 max

Front Tire Order Code


Rear Tire Order Code


Spare Tire Order Code


Front Tire Size

P265/65R18, P285/45R22, P275/55R20, P275/55R20, P265/65R18

Rear Tire Size

P265/65R18, P285/45R22, P275/55R20, P275/55R20, P265/65R18

Spare Tire Size


Revolutions/Mile @ 45 mph – Front

N/A  Rev/Mile

Revolutions/Mile @ 45 mph – Rear

N/A  Rev/Mile

Revolutions/Mile @ 45 mph – Spare

N/A  Rev/Mile

Spare Wheel Size

17 x 7.5  in

Spare Wheel Material


Steering Type

Pwr Rack & Pinion

Turning Diameter – Wall to Wall

N/A  ft

Brake Type


Brake ABS System


Disc – Front (Yes or )


Disc – Rear (Yes or )


Fuel Tank Capacity, Approx

31  gal  31.0 min 31.0 max

Front Head Room

42.80  in  42.8 min 42.8 max

Front Leg Room

45.30  in  45.3 min 45.3 max

Front Shoulder Room

64.80  in  64.8 min 64.8 max

Front Hip Room

60.80  in  60.8 min 60.8 max

Second Head Room

39.10  in  39.1 min 39.1 max

Second Leg Room

39.70  in  39.7 min 39.7 max

Second Shoulder Room

65.10  in  65.1 min 65.1 max

Second Hip Room

60.30  in  60.3 min 60.3 max

Third Head Room

38.50  in  38.5 min 38.5 max

Third Leg Room

34.50  in  34.5 min 34.5 max

Third Shoulder Room

62.60  in  62.6 min 62.6 max

Third Hip Room

49.30  in  49.3 min 49.3 max


130.00  in  130.0 min 130.0 max

Length, Overall w/rear bumper

224.4  in  224.4 min 224.4 max

Width, Max w/o mirrors

80.50  in  80.5 min 80.5 max

Height, Overall

74.4  in  74.4 min 74.4 max

Ground to Top of Load Floor

35.43  in  35.43 min 35.43 max

Ground Clearance, Front

7.91  in  7.91 min 7.91 max

Ground Clearance, Rear

7.91  in  7.91 min 7.91 max

Rear Door Type


Cargo Area Length @ Floor to Seat 1

100.3  in  100.3 min 100.3 max

Cargo Area Length @ Floor to Seat 2

63.6  in  63.6 min 63.6 max

Cargo Area Length @ Floor to Seat 3

31.6  in  31.6 min 31.6 max

Cargo Box Width @ Wheelhousings

49.3  in  49.3 min 49.3 max

Cargo Box (Area) Height

34.92  in  34.92 min 34.92 max

Cargo Volume to Seat 1

121.7  ft³  121.7 min 121.7 max

Cargo Volume to Seat 2

76.7  ft³  76.7 min 76.7 max

Cargo Volume to Seat 3

39.3  ft³  39.3 min 39.3 max

Model Group


Vehicle Segment

Large Sport Utility

Vehicle Type

Sport Utility

Engine Displacement Units

5.3, 5.3    5.3 min 5.3 max

Engine Camshaft


Engine Block Type

aluminum, aluminum

Engine Cylinder Count

8, 8    8.0 min 8.0 max

Engine Valve Count

2, 2    2.0 min 2.0 max

Country of Origin

United States Chevrolet Active MPV


How to Determine If Your GM SUV Has ZW7 Premium Smooth Ride Suspension or Z55 Autoride Suspension

GM’s full-sized SUVs, the Chevrolet Avalanche, Tahoe and Suburban, the GMC Denali, Yukon and Yukon XL and the Cadillac Escalade, came with several different suspension options. It can be confusing when buying replacement shocks and suspension to try to figure out if your SUV has a premium Smooth Ride or Autoride.

Every vehicle that GM produces comes with a sticker listing the alpha-numeric codes of all of the vehicle’s options. These are known as RPO codes and can be very useful when trying to determine what type of suspension your GM SUV has. There are 3 different “styles” of suspensions that these vehicles come with.

Conventional: there are numerous RPO codes for different types of conventional suspensions, the most well-known being Z71 and Z66. These suspension codes are interchangeable and standard aftermarket shocks will fit any type of conventional suspension. This suspension uses the most basic components: a coil spring or torsion bar spring with a conventional gas charged shock absorber. The Bilstein Heavy Duty and 5100 Series or the KYB Monomax and Gasajust are popular performance replacements. The KYB GR2 and Monroe Reflex and Sensatrac are good quality OEM replacement shocks.

Premium Smooth Ride: indicated by the RPO code ZW7. This suspension uses a conventional suspension in the front, but the rear uses a self-contained, self-leveling Nivomat shock in the rear. ZW7 equipped trucks come with a softer spring in the rear since the Nivomat self-leveling system does some of the work of holding the truck up. Replacing a ZW7 Nivomat unit with a standard shock requires also replacing the spring, otherwise the truck will sag in the rear and have a much harsher ride and potentially dangerous handling.

Autoride: indicated by the RPO code Z55. This suspension system uses electronic shocks in the front that automatically adjust to road conditions, becoming stiffer or softer as necessary. The rear will use an electronically controlled self-leveling air shock that is monitored by ride height sensors and inflated remotely from an on-board air compressor.