Hill descent control

[Geoffwhite18]

I don't think I will ever tow a trailer down a steep grade off road at less than 31 mph, so I doubt I will ever need it.

[x219c]

Nah, the hill descent control isn’t used for towing that I’m aware of. It only operates to 30mph or something like that. It’s for going down hills while off road.

 

I have never been able to use the feature.

 

Edit: I see you found the info. In my opinion, it’s pretty useless. You got the important stuff from the z71 package on your truck.

[JimCost2014]

When towing.

 

 

I don't think I will ever tow a trailer down a steep grade off road at less than 31 mph, so I doubt I will ever need it.

 

 

Nah, the hill descent control isn’t used for towing that I’m aware of. It only operates to 30mph or something like that. It’s for going down hills while off road.

 

I have never been able to use the feature.

 

Edit: I see you found the info. In my opinion, it’s pretty useless. You got the important stuff from the z71 package on your truck.

Straight from the owners manual. I have used it on a steep gravel road, works pretty good when you get over all of the noises that the truck makes using the it.

Hill Descent

Control (HDC)

If equipped, HDC can be used when

driving downhill. It sets and

maintains vehicle speed while

descending a very steep incline in a

forward or reverse gear.

The HDC switch is on the center

stack, below the climate controls.

Press 5 to enable or disable HDC.

Vehicle speed must be below

50 km/h (31 mph).

The HDC light displays on the

instrument cluster when enabled.

HDC can maintain vehicle speeds

between 3 and 22 km/h (2 and

14 mph) on an incline greater than

or equal to a 10% grade. A blinking

HDC light indicates the system is

actively applying the brakes to

maintain vehicle speed.

When HDC is activated, the initial

HDC speed is set to the current

driving speed. It can be increased or

decreased by pressing the +RES or

SET- steering wheel controls or by

applying the accelerator or brake

pedal. This adjusted speed

becomes the new set speed.

HDC will remain enabled between

22 and 60 km/h (14 and 37 mph);

however vehicle speed cannot be

set or maintained in this range.

It will automatically disable if the

vehicle speed is above 80 km/h

(50 mph) or above 60 km/h

(37 mph) for at least 30 seconds. 5

must be pressed again to

re-enable HDC.

When enabled, if the vehicle is at a

speed above 22 km/h (14 mph) and

less than 60 km/h (37 mph), a DIC

message will display. See Vehicle

Speed Messages 0 164

[thefishhawk]

I wrote that yesterday and wasn't signed in and it got lost LOL......if you like your truck don't worry about it, you aren't missing anything. Not to devalue the feeling of getting mislead about what it was, but as far as the truck you won't miss the HDC. It works totally spotty and I don't trust it, old-school using 4lo is better. I've only used it a handful of times to play with it around Moab, and I offroad quite a bit. It needs to be improved for sure.

 

The other poster was talking about grade braking, which is often confused with hill descent control. HDC is low speed off road or short icy stretch down a bad driveway or something, grade braking you'll still have and is used when going down a long highway descent type stretch, so that's why it helps when towing. Uses the engine and lower gears to maintain speed instead of frying the brakes.

[sk]

As it turns out, it's a 1LZ. They even underlined it. I never thought to double check the rpo codes. It has an oem Z71 grill, oem Z71 decals, oem Z71 sill plates, oem Z71 skid plates.

Moral of the story is, if you see wood, it's not a Z71 (2LZ). I still love the truck. I'm really only missing decent control, but honestly how often is it used?

 

Well there's your answer then. The 1LZ package is not the same as the Z71 so they must have ordered that package then added some of the Z71 "eye candy". Also means you are missing the high-capacity air cleaner, alternator, and maybe the oil and transmission coolers (but the 1LZ package may include some of those).

 

If it was advertised as a Z71 and you paid for a Z71 I would go back to the dealer and argue. If you like the truck just keep it but try to get them to give you some cash back. As others said the true answer can be found by running the VIN through the GM system. This will tell you EXACTLY what RPO codes the truck was built with.

 

Still a nice truck -- good luck and enjoy it!

[Geoffwhite18]

There were some things offered on the 1LZ that weren't available in the 2LZ, abs some things in the 2LZ that weren't available in the 1LZ. From what I can tell, the 2LZ package only changed the base price by $800.00, and most of the 2LZ options are pretty much useless except for the shocks, (rancho shocks are awesome. Had them on my 2001.) and some of the appearance changes are nice. Seriously, plastic skid plates arent going to help much off road.

[Geoffwhite18]

Anyone with a 2014 ltz Z71 willing to post a picture of their rpo sticker? I went to the dealership to find one and aparently ltz and z71 isn't very common. Lots of ltzs and lots of lt z71s on the lott. I'm just hoping to compare differences.

[JimCost2014]

Anyone with a 2014 ltz Z71 willing to post a picture of their rpo sticker? I went to the dealership to find one and aparently ltz and z71 isn't very common. Lots of ltzs and lots of lt z71s on the lott. I'm just hoping to compare differences.

Here is the build sheet from the 2014 that I had.

 

 

Option Codes

 

*IVH 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.

 

1SZ - OPTION PACKAGE DISCOUNT

2LZ - 2LZ PACKAGE

 

4AA - INTERIOR TRIM

6YN - COMPONENT FRT LH COMPUTER

 

7YN - COMPONENT FRT RH COMPUTER

8X2 - COMPONENT RR LH NON-COMPUTER

 

9X2 - COMPONENT RR RH NON-COMPUTER

A31 - POWER WINDOWS

 

A45 - DRIVER SEAT, MEMORY ADJUST

A48 - WINDOW, POWER, REAR SLIDING

 

A60 - LOCKING TAILGATE

A68 - SEAT 60/40 REAR FOLDING BENCH

 

AKO - GLASS, DEEP-TINTED

AL0 - AIRBAG SENSING SYSTEM, PASSENGER

 

AN3 - SEATS, FRONT FULL FEATURE LEATHER APPOINTED BUCKETS

AQQ - REMOTE KEYLESS ENTRY

 

AU3 - POWER DOOR LOCK SYSTEM

AXK - VEHICLE TYPE TRUCK

 

AY0 - AIRBAGS DRIVER AND FRONT PASS

B1J - WHEELHOUSE LINERS, REAR

 

B30 - COLOR KEYED CARPET

B32 - FLOOR MATS, FRONT

 

B33 - FLOOR MATS, REAR

B85 - BODY SIDE MOLDING, CHROME

 

BTV - REMOTE VEHICLE START

BVQ - 6" CHROME ASSIST STEPS

 

BWN - CORNERSTEP, REAR BUMPER

C49 - ELECTRIC REAR WINDOW DEFOGGER

 

C5Z - 7,200 LB GVW RATING

CF5 - POWER SUNROOF

 

CJ2 - AIR CONDITIONING, DUAL ZONE CLIMATE CONTROL

D07 - CENTER CONSOLE, FLOOR

 

DD8 - INSIDE REARVIEW MIRROR, AUTO DIMMING

DH6 - VISORS, DRIVER AND FRONT PASSENGER, LIGHTED

 

DL3 - POWER HEATED OUTSIDE MIRROR, ADJUSTABLE W/ TURN SIGNAL

DP9 - MIRROR CAPS, CHROME

 

E20 - DOOR HANDLES, CHROME

E63 - PICK UP BOX

 

EF7 - COUNTRY UNITED STATES OF AMERICA (USA)

FHO - VEHICLE FUEL GASOLINE E10

 

G80 - AUTO LOCKING REAR DIFFERENTIAL

GBA - BLACK

 

GU6 - REAR AXLE 3.42 RATIO

H3B - JET BLACK

 

I14 - ENGINEERING MODEL YEAR

IO6 - CHEVROLET MYLINK AUDIO SYSTEM W/ 8" DIAGONAL COLOR TOUCH & NAVIGATION

 

JD9 - ANTILOCK BRAKES, 4 WHEEL DISC

JF4 - POWER ADJUSTABLE PEDALS

 

JHD - HILL DESCENT CONTROL

JL1 - TRAILER BRAKE CONTROLLER

 

K34 - CRUISE CONTROL

K47 - HIGH CAPACITY AIR CLEANER

 

KB6 - HEATED & COOLED SEATS DRIVER & FRONT PASSENGER

KC4 - ENGINE OIL COOLING SYSTEM

 

KG4 - ALTERNATOR, 150 AMPS

KI4 - POWER OUTLET, 110-VOLT AC

 

KNP - TRANSMISSION OIL COOLER

L86 - ENGINE, 6.2L V8 ECOTEC3

 

MAH - MARKETING AREA NORTH AMERICA

MSL - SILAO, MEXICO PLANT

 

MYC - TRANSMISSION, 6 SPD AUTOMATIC

N37 - STEERING COLUMN, TILT & TELESCOPING

 

[JimCost2014]

Anyone with a 2014 ltz Z71 willing to post a picture of their rpo sticker? I went to the dealership to find one and aparently ltz and z71 isn't very common. Lots of ltzs and lots of lt z71s on the lott. I'm just hoping to compare differences.

Part 2.

NE1 - 50-STATE EMISSIONS

NKC - ACTIVE NOISE CANCELLATION

 

NP5 - LEATHER WRAP STEERING WHEEL

NQH - TRANSFER CASE 2-SPEED

 

NU5 - EMISSION SYSTEM CALIFORNIA

NZZ - UNDERBODY SHIELD, TRANS CASE

 

PDF - LTZ PLUS PACKAGE * POWER ADJUSTABLE PEDALS * BOSE AUDIO SYSTEM * HEATED STEERING WHEEL

PPA - EZ LIFT AND LOWER TAILGATE

 

R6S - IDENTIFIER - N37 CONSTRAINT

R8J - VRV VOM PROCESSING OPTION

 

R9N - FORCE ON ALL VEHICLES FOR PRICING OF INTERIOR TRIM

RC4 - TIRE, SPARE 17" ALL SEASON BLACKWALL

 

RC7 - 20" TIRES, ALL TERRAIN

RD2 - WHEELS, 20" CHROME (REPLACES STD/OPT WHEELS)

 

ROO - BARS VOMS BAILMENT

RUF - WHEEL, 17" STEEL SPARE

 

SAF - SPARE TIRE LOCK

SCZ - TAILGATE HANDLE, CHROME (DEALER INSTALLED)

 

SDA -

SFE - WHEEL LOCKS (DLR INSTALLED)

 

SLM - STOCK ORDERS

SLT - SALES PACKAGE

 

T3U - FRONT FOG LAMPS

TG5 - SINGLE-SLOT CD/MP3 PLAYER

 

U2M - SIRIUSXM + SERVICE SUBSCRIPTION SOLD SEPARATELY BY SIRIUSXM AFTER 3 MONTHS

U73 - ANTENNA - FIXED MAST

 

UD5 - FRONT AND REAR PARK ASSIST

UDD - DRIVER INFO - COLOR DISPLAY

 

UE1 - ONSTAR

UEU - FORWARD COLLISION ALERT

 

UF2 - LED LIGHTING, CARGO BOX

UFL - LANE DEPARTURE WARNING

 

UG1 - HOMELINK

UJM - TIRE PRESSURE MONITOR SYSTEM (EXCL SPARE TIRE)

 

UK3 - STEERING WHEEL AUDIO CONTROLS

UMN - SPEEDOMETER

 

UQA - BOSE AUDIO SYSTEM

UTJ - THEFT DETERRENT SYSTEM

 

UVC - REAR VISION CAMERA

UVD - HEATED STEERING WHEEL

 

V22 - CHROME GRILLE SURROUND

V46 - FRONT BUMPER, CHROME

 

V76 - RECOVERY HOOKS, FRONT

V8D - VEHICLE STATEMENT

 

VJH - BUMPER, REAR CHROME

VK3 - FRONT LICENSE PLATE BRACKET

 

VQZ - POLISHED EXHAUST TIP (DEALER INSTALLED)

VRK - VAA/COMPONENT REL ROOF TRIM

 

VRV - SPLASH GUARDS, BODY COLOR (DEALER INSTALLED)

VT7 - OWNERS MANUAL ENGLISH

 

VZE - VIN MODEL YEAR 2014

WEA - Z71 APPEARANCE PACKAGE

 

X88 - CHEVROLET CONVERSION

XL7 - FREQUENCY RATING 315 MH

 

Y65 - DRIVER ALERT PACKAGE * FRONT AND REAR PARK ASSIST * LANE DEPARTURE WARNING * FORWARD COLLISION ALERT * SAFETY ALERT SEAT

YE9 - TRIM PACKAGE

 

YM8 - LPO PROCESSING OPTION

Z71 - Z71 OFF-ROAD SUSPENSION

 

Z82 - TRAILERING EQUIPMENT PKG

ZY1 - SOLID PAINT

 

[Geoffwhite18]

Thank you. I was going to compile the information in a similar fashion.

[Cheverado]

The thing to me that comes to my mind is the silver painted plastic part that is located under the front bumper above the valence (thing that the front license plate bracket mounts to). LT and below is black, High Country and LTZ is chrome. If it doesn't have this unique part is definitely isn't a Z71. Replacing this thing is a miserable task and I cant see a dealership taking the entire front end off of a truck to replace this just to make it a "Z71". I'd be curious to see if that dealership is selling more of these "faux"" Z71s.

[15 Z71]

Wonder why they put so much more badging on the silverado z71 then the Sierra? I have a Sierra and other then the z71 4x4 badge on top of front fenders you would not know it.

[Cheverado]

There are a couple of Sierra Z71s in the parking lot at the plant here. I've noticed two of them that have removed the emblems from the fenders and put the decals on the bed. One of them has a Z71 emblem in the grill. Another one of them has both fender badges and bed decals but it just looks too busy with both if you ask me. The price you pay to drive "Professional Grade"

[Donstar]

I suggest going back to the dealer if you believe that you were mislead. You may get some goodwill compensation in service or parts. If this option was critical in your decision to buy this particular truck then legal advice may be a good idea. I believe you will find that there is more responsibility on the purchaser when buying a used vehicle.

[15 Z71]

There are a couple of Sierra Z71s in the parking lot at the plant here. I've noticed two of them that have removed the emblems from the fenders and put the decals on the bed. One of them has a Z71 emblem in the grill. Another one of them has both fender badges and bed decals but it just looks too busy with both if you ask me. The price you pay to drive "Professional Grade"

I guess so..i looked at 5 chevy dealers for a silverado when buying a truck. I have always had chevy trucks. Stopped at a GMC dealer got my Sierra for for same price as they where wanting for the silverados I looked at. And now that I have it I'm glade I got a Sierra. I would have had to get a pretty high trim in chevy to get what my Sierra has.