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  #31  
Old 05-21-2013, 12:45 PM
djkslc djkslc is offline
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It is in the GM dealers service shop today having the transmission checked. It is just not right. The shift points are terrible while towing. In fact I towed with it again last week and had similar things happening. I had to stop on a flat road at a light, when the light turned green it was like the car was starting in 3rd gear. The passengers with me joked that they may need to get out and push start me. My biggest fear is that they call me back and say that everything checks out fine.
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  #32  
Old 05-21-2013, 04:26 PM
djkslc djkslc is offline
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Yukon is back, and the diagnosis is what I feared - nothing wrong. Diagnostic says it's fine, and they had 3 mechanics drive it around and they all said it's running like it should. So if that's the case, what are the next things to look for. Could a higher gear ratio (I don't know what gear ratio I have) hake that much difference. I asked them about chipping it and they all freaked out and said it would instantly void my warranty, which I don't want. I am having a hard time believing my 08 Tahoe and this 12 Yukon with the same engine could tow so differently.
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  #33  
Old 05-21-2013, 04:49 PM
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Ski-me Ski-me is offline
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Hook up your trailer and then have them tow it around. See if they still think it's OK.....

The issue only occurs during towing correct? Not normal driving.
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  #34  
Old 05-21-2013, 06:06 PM
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mustangtexas mustangtexas is online now
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Quote:
Originally Posted by djkslc View Post
Yukon is back, and the diagnosis is what I feared - nothing wrong. Diagnostic says it's fine, and they had 3 mechanics drive it around and they all said it's running like it should. So if that's the case, what are the next things to look for. Could a higher gear ratio (I don't know what gear ratio I have) hake that much difference. I asked them about chipping it and they all freaked out and said it would instantly void my warranty, which I don't want. I am having a hard time believing my 08 Tahoe and this 12 Yukon with the same engine could tow so differently.
Post the last 8 digits plus the first 3 digits of your VIN and I will post the build sheet for your Yukon.
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  #35  
Old 05-21-2013, 06:54 PM
djkslc djkslc is offline
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first 3 digits = 1GK Last 8 digits = CR227944
Thanks in advance
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  #36  
Old 05-21-2013, 08:29 PM
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mustangtexas mustangtexas is online now
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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.

193 - EBONY
19I - EBONY
1SZ - OPTION PACKAGE SAVINGS 4SA - 4SA TRIM
6PB - COMPONENT FRT LH COMPUTER SEL SUSP
7PB - COMPONENT FRT RH COMPUTER SEL SUSP
A31 - POWER WINDOWS
A95 - SEATS, FRONT BUCKET LEATHER APPOINTED
AG1 - PWR SEAT ADJUSTER, DRIVER
AG2 - PWR SEAT ADJUST, FRONT PASSENGER
AJ1 - GLASS, DEEP TINTED
AJ7 - SEAT MOUNTED SIDE IMPACT AIRBAGS, DRIVER AND RIGHT FRONT PASSENGER
AL0 - SENSOR INDICATOR, INFLATABLE RESTRAINT AM1 - SEAT ADJUSTER, MANUAL
AM8 - 2ND ROW LEATHER APPOINTED 60/40 SPLIT BENCH SEAT
AP3 - REMOTE VEHICLE START
ARL - PLANT CODE-ARLINGTON, TX
AS3 - 3-PASSENGER, 3RD ROW SEAT VINYL
ASF - HEAD CURTAIN SIDE AIRBAGS W/ ROLLOVER PROTECTION
AU3 - POWER DOOR LOCKS
AXP - MPV VIN IDENTIFICATION
B30 - FULL-COLOR KEYED CARPET W/MATS
B58 - FLOOR MATS, FRONT & REAR
B85 - * BODY SIDE MOLDING, BODY COLOR INSERT
B9E - VEHICLE GM PRODUCTION WEEK 05
BVE - RUNNING BOARDS, ASSIST STEPS
C1U - FLT-ENTERPRISE RENT A CAR
C25 - IMTERMITTENT FRONT WIPERS
C36 - REAR HEATER C49 - REAR WINDOW DEFROSTER
C69 - AIR CONDITIONING, REAR C6A - GVW RATING - 7,300 LBS
CJ2 - AIR CONDITIONING, TRI ZONE AUTO CLIMATE CONTROL
D07 - CENTER CONSOLE, FLOOR
DCP - ONSTAR PROCESSING DIRECTIONS & CONNECTIONS
DH6 - LIGHTED VISOR MIRRORS
DK8 - OVERHEAD CONSOLE
DL8 - POWER HEATED OUTSIDE MIRRORS
DRC - INSIDE REARVIEW MIRROR W/ REAR CAMERA DISPLAY
E52 - LIFTGATE W/LIFTGLASS
EF7 - US COUNTRY CODE FHS - VEHICLE FUEL GASOLINE E85
FLT - FLEET PROCESS OPTION
G80 - DIFFERENTIAL, LOCKING REAR FULLY AUTOMATIC
GAN - QUICKSILVER METALLIC
GU4 - REAR AXLE 3.08 RATIO
JD9 - ANTILOCK BRAKES, 4 WHEEL DISC
JF4 - ADJUSTABLE PEDALS
JL4 - STABILITRAK-STABILITY CONTROL SYSTEM W/ TRACTION CONTROL
K34 - CRUISE CONTROL
KA1 - DRIVER & FRONT PASSENGER HEATED SEATS
KW1 - 160 AMP ALTERNATOR
LMG - ENGINE: VORTEC 5.3L SFI WITH ACTIVE FUEL MANAGEMENT & FLEX FUEL CAPACITY MYC - TRANSMISSION: 6 SPD AUTOMATIC
N88 - WHEELS, 17" BRIGHT ALUMINUM
NC7 - FEDERAL EMISSION OVERRIDE
NE1 - 50-STATE EMISSIONS
NP0 - TRANSFER CASE SINGLE SPEED
NP5 - LEATHER WRAP STEERING WHEEL
NU5 - EMISSION SYSTEM CA BIN 4
NZ4 - SPARE WHEEL, 17" STEEL
QAN - TIRES, ALL SEASON BLACKWALL
R6F - IDENTIFY B CODE USERS
R9N - PROCESSING CODE - SEAT
SAF - SPARE TIRE LOCK SLT - SALES PACKAGE
T74 - HEADLAMPS, AUTOMATIC
T96 - FOG LAMPS, FRONT
TL1 - DELUXE GRILLE W/COMP. HEADLAMPS
U2K - XM RADIO + SERVICE SUBSCRIPTION SOLD SEPARATELY BY SIRIUSXM AFTER 3 MTHS
U84 - ANTENNA BODY SIDE WINDOW, RADIO
UD7 - REAR PARKING ASSIST
UE1 - 6 MTHS ONSTAR DIRECTIONS AND CONNECTIONS WITH AUTOMATIC CRASH RESPONSE & TURN-BY-TURN NAVIGATION (ASK DEALER ABOUT GEOGRAPHIC COVERAGE) * ONSTAR PROCESSING DIRECTIONS & CONNECTIONS
UG1 - UNIVERSAL HOME REMOTE
UJM - TIRE PRESSURE MONITOR (EXCL SPARE TIRE)
UK3 - STEERING WHEEL CONTROLS
UK6 - AUDIO CONTROLS, REAR SEAT
UPF - BLUETOOTH FOR PHONE
UQA - AUDIO SYSTEM - BOSE PREMIUM
USR - USB PORT
UUI - AM/FM STEREO CD PLAYER WITH AUX INPUT JACK
UVC - REARVIEW CAMERA SYSTEM
V1K - LUGGAGE RACK CENTER RAILS
V54 - LUGGAGE RACK SIDE RAILS
V76 - RECOVERY HOOKS, FRONT
V8D - VEHICLE STATEMENT US
VGD - BODY COLOR FRONT FACIA
VGE - REAR FACIA, BODY COLOR
VK3 - FRONT LICENSE PLATE MOUNT
VQ2 - FLEET ORDERING & ASSISTANCE
VR4 - TRAILERING RECEIVER
VT7 - OWNERS MANUAL ENGLISH
VX7 - FLT-PURCHASE RISK PROGRAM
XL7 - FREQUENCIES RATING 315 MHZ, LONG DISTANCE
YD3 - BASE EQUIP FOR SCH GVW PLATE
YD5 - FRONT SPRING - BASE EQUIPMENT
YD6 - REAR SPRING - BASE EQUIPMENT
YE9 - SLE/SLT DECOR
Z82 - H.D. TRAILERING EQUIPMENT
Z88 - GMC TRUCK NAMEPLATE
ZRS - SPARE TIRE
ZW7 - PREMIUM SMOOTH RIDE SUSPENSION
ZY1 - SOLID PAINT
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  #37  
Old 05-21-2013, 08:37 PM
Miss Rita's Avatar
Miss Rita Miss Rita is offline
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Quote:
GU4 - REAR AXLE 3.08 RATIO
I don't know much about towing packages on newer GM trucks, but 3.08 gears seems to be a little high to me.
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  #38  
Old 05-21-2013, 09:44 PM
j.mccreight@hotmail.com's Avatar
j.mccreight@hotmail.com j.mccreight@hotmail.com is online now
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Quote:
Originally Posted by Miss Rita View Post
I don't know much about towing packages on newer GM trucks, but 3.08 gears seems to be a little high to me.
Yep definatly not a towing gear, and with the 3.08 gear your max tow capacity is 5,500 lbs.

This truck was probably driven hard and put away wet with it being an enterprise rent a car, most rent car companies around here keep the cars around 30-40k miles, so one has to wonder why they got rid of this truck so early...
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Last edited by j.mccreight@hotmail.com; 05-21-2013 at 10:16 PM.
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  #39  
Old 05-21-2013, 10:16 PM
djkslc djkslc is offline
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Looks like I may have made a mistake in buying 3.08 geared truck and expecting it to tow well. How hard and expensive is it to change gears? Or do I realize that I made a mistake and upgrade to a better towing vehicle? It's really nice minus the towing.
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  #40  
Old 05-21-2013, 10:25 PM
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j.mccreight@hotmail.com j.mccreight@hotmail.com is online now
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Quote:
Originally Posted by djkslc View Post
Looks like I may have made a mistake in buying 3.08 geared truck and expecting it to tow well. How hard and expensive is it to change gears? Or do I realize that I made a mistake and upgrade to a better towing vehicle? It's really nice minus the towing.
Swapping to a 3.42 or 3.73 can be done and will likely cost around $1,000 parts and labor, but you have to think is the rest of the truck up to the task, ie tow package, bigger coolers etc. plus lower fuel economy more rpm's means noisier truck, you have to out way the pro's vs. con's

Your xstar w/ trailer weighs around 4,300 lbs. dry so your definatly near the max of what this truck is capable of doing is present condition, unless there is something really wrong with the unit.
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