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Comments
Did you go back to the beginning of this thread and count how many owners are having issues? To be fair we are talking about the redesigned Silverado/Sierra that came out in '07 with the six speed as an option with certain motors.
I did, and I am not to count them again, but it's somewhere less than a dozen (a very vocal dozen people). Some, complain about a clunking (which does not happen all the time) but this does not affect the shifting whatsoever. And remember, there was about 50,000 units of the Silverado/Sierra sold in June. People would not be buying them thinking there were wide spread issues. I would find it hard to believe some of these 50,000 people didn't do some Internet searching beforehand and come across some of these posts, but saw the small number of complaints and bought anyway based on the outstanding value these trucks provide.
So you changed you buying decision based on 12 people?
Based on your post I assume your not hauling or towing.
Good luck on whatever you decide.
Your dealer has dozens of warranty issues to deal with everyday. The techs try not to spend too much time on warranty work as they are paid a commission on revenue generating service. To get them to work on issues you have to help them identify what you're trying to describe to the service advisor. If not, you will most likely get a "could not duplicate" on your work order or as in your case they found no codes and found everything working within specifications.
lidarules1 you got big ones. I stoped taking my kids in the truck after the wife almost rearended a car cause the dam thing would not down shift
I have, I am a member of some of those sites. It's the same thing - very few complaints based on volume sold.
I've found that the make of the vehicle usually doesn't matter much. With warranty issues I've pulled teeth with virtually every make. What I did discover though is if you choose to try another GM dealer it might make a world of difference.
Before dumping the truck I would at least
-Try another dealer
-Check out the TSBs available for your truck; you wouldn't be the first to walk into a service department with a TSB that they had overlooked
-You could email the GM customer service rep that monitors the GM boards and see if they can assist you with your dealer
Getting rid of the truck I would think would be the last resort due to the substantial depreciation hit. Let me see if I can find the list of service bulletins.
INFORMATION
Bulletin No.: 01-07-30-042F
Date: February 05, 2010
Subject: Information on 2-3 Upshift or 3-2 Downshift Clunk Noise
Models:
2010 and Prior GM Passenger Cars and Light Duty Trucks
2010 and Prior HUMMER H2, H3
2005-2009 Saab 9-7X
with 4L60-E, 4L65-E or 4L70-E Automatic Transmission (RPOs M30, M32, M70)
Supercede:
This bulletin is being revised to add the 2010 model year and 4L70E transmission. Please discard Corporate Bulletin Number 01-07-30-042E (Section 07 - Transmission/Transaxle).
Important
For 2005 model year fullsize utilities and pickups, refer to Corporate Bulletin 05-07-30-012.
Some vehicles may exhibit a clunk noise that can be heard on a 2-3 upshift or a 3-2 downshift.
During a 2-3 upshift, the 2-4 band is released and the 3-4 clutch is applied. The timing of this shift can cause a momentary torque reversal of the output shaft that results in a clunk noise. This same torque reversal can also occur on a 3-2 downshift when the 3-4 clutch is released and the 2-4 band applied. This condition may be worse on a 4-wheel drive vehicle due to the additional tolerances in the transfer case.
This is a normal condition. No repairs should be attempted.
00-03-10-002F 04/21/2011 Wheels - Chrome Wheel Staining/Pitting/Corrosion
09-08-64-032A 04/18/2011 Body - Chrome Outside Door Handle Loose/Cracked
09-08-110-013A 04/18/2011 Interior - Sun Visor Fails to Stay In Up Position
11-08-111-002 04/13/2011 Body - Colored Side Mouldings Dull/Discolored/Stained
10-05-23-001B 04/13/2011 Brakes - Front Brake Induced Pulsation/Vibration
09-08-50-011A 04/13/2011 Body - Sticking/Binding Door Mounted Seat Switches
09-03-09-001A 04/13/2011 Suspension - Clunking Noise from Rear Of Vehicle
07-03-10-012D 04/12/2011 Tires/Wheels - Rattle Noise from Wheel Or Hub Cap
06-08-64-027I 04/12/2011 Body - LH/RH Outside Rearview Mirror Glass Shake/Flutter
06-08-61-003F 04/12/2011 Body/Frame - Underbody Pop/Clunk When Turning
08-08-67-006B 04/11/2011 Body - Headliner Wet/Water Leak Into Cab Past Sunroof
03-08-48-006H 04/11/2011 A/C - Window Defroster Contact/Tab Repair Information
08-08-45-004C 04/08/2011 Electrical - Installation Of Aftermarket Accessories
07-08-64-019C 04/08/2011 Body - Front Door Window Regulator Squeak Noise
08-09-41-005B 04/06/2011 Interior - Passenger Air Bag Is Not Flush With Dash
08-08-50-001D 04/06/2011 Interior - Front Seat Cushion Cover Becomes Detached
08-08-48-003F 04/06/2011 Body - Tapping/Clicking/Ticking Noise at Windshield Area
08-08-61-005B 03/30/2011 Body - Front/Rear Fender Liners Warped/Wavy
06-00-89-031B 03/28/2011 Engine, A/T - Identification Information
10-08-50-003A 03/24/2011 Restraints - Driver/Passenger Seat Head Rest Information
07-06-05-001I 03/22/2011 Exhaust - Muffler Heat Shield Buzz During Operation
99-08-51-007E 03/17/2011 Wheels/Tires - Refinishing Aluminum Wheels
11-09-41-002 03/17/2011 Restraint System - Air Bag Warning Lamp On Repeat DTC's
11-00-90-001 03/14/2011 Engine - GM dexos 1 and dexos 2(R) Oil Specifications
10-08-58-001E 03/08/2011 Interior - Excessive Wind Noise In Interior Of Vehicle
02-07-30-052G 03/02/2011 A/T - Fluid Oil Cooler Flush
99-08-51-001B 03/01/2011 Body - Paint-Less Dent Repair Recommendations
11-01-38-001 02/28/2011 A/C - Excessive Cabin Moisture/Reduced Window Clearing
06-08-43-003C 02/21/2011 Glass/Body - Windshield Wiper Performance
09-04-19-002A 02/17/2011 Drivetrain - Excessive Effort When Shift 2HI to 4HI
10-08-61-001A 02/16/2011 Body - Body Mount Bolt Stripped or Will Not Loosen
06-08-44-034E 02/11/2011 Navigation Radio - Various Noises Explained
10-06-01-007C 02/09/2011 Engine - Valve Lifter Tick Noise At Start Up
10-06-05-003A 02/04/2011 Exhaust System - Exhaust Leak/Rattle/Rumble/Noises
09-09-40-001A 02/02/2011 Restraints - Seat Belt Warning Lamp On/Buckling Issues
10-08-42-001B 01/24/2011 Lighting - Low Beam Headlamp(s) Inoperative
10-06-04-008A 01/24/2011 Engine - MIL ON P0116/P1400 Set In Very Cold Temps
10-08-50-008B 01/13/2011 Seats - Driver/Passenger Heated Seats Inop./Slow to Warm
01-08-42-001H 01/05/2011 Lighting - Exterior Lamp Condensation and Replacement
09-08-66-004A 01/04/2011 Body - Soft Tonneau Cover Appears Loose/Won't Latch
09-08-66-003A 12/23/2010 Body - Tonneau Cover Fits To Loose On Vehicle
06-08-50-009F 12/23/2010 Restraints - Passenger Presence System Information
05-08-46-004C 12/23/2010 OnStar(R) - Number Incorrect/Incorrectly Assigned
03-07-29-004G 12/15/2010 Manual Transmission - M/T Operating Characteristics
05-03-07-009C 12/09/2010 Steering/Suspension - Wheel Alignment Specifications
10-06-04-015 12/08/2010 Fuel - GM's Position on Use of E 15 in 2007 Newer M.Y.
09-06-03-004D 12/08/2010 Electrical - MIL ON/DTC's Set By Various Control Modules
07-08-49-020D 12/06/2010 Instruments - IPC Odometer Programming Reference Guide
09-08-64-012C 11/22/2010 Body - Side Door Body Mounted Weatherstrip Replacement
01-08-51-003B 11/19/2010 Body - Application of Anti-Corrosion Materials
04-06-04-054B 11/18/2010 Engine Controls - Aftermarket Accessory Usage
06-03-09-004C 11/11/2010 Suspension - Squeak Noise from Rear of Vehicle
07-08-42-006E 11/11/2010 Instruments - Bulb Outage Detection Restoration
10-08-44-004A 11/11/2010 Audio - Information on USB/Multimedia Player
07-08-45-001F 11/09/2010 Accessories - Aftermarket Trailer Brake Controller
10-03-08-002A 11/03/2010 Suspension - Multiple Noises From Front Of Vehicle
08-07-30-035B 11/01/2010 A/T - Water Or Coolant Contamination Information
08-06-02-003A 10/27/2010 Engine - Oil Leak At Oil Cooler Hose/Pipe Assembly
05-06-04-022G 10/27/2010 Fuel System - TOP TIER Detergent Gasoline (Canada)
10-08-45-001B 10/25/2010 Electrical - Information For Electrical Ground Repair
05-09-40-002E 10/21/2010 Restraint System - Normal Safety Belt Locking Conditions
10-02-33-001A 10/13/2010 Steering/Suspension - Pitman Arm Shaft Seal Service Kit
10-08-44-003B 10/13/2010 Audio - Buzz Noise When Using Bluetooth(R)
10-08-44-006 10/11/2010 Navigation - Report Missing/Inaccurate Nav. Map Info
09-08-44-013C 10/05/2010 Audio System - USB/Multimedia Interface Information
09-08-66-011A 10/04/2010 Accessories - Pick Up Box Accessory Mounting Information
02-06-04-037I 09/16/2010 Emissions - MIL ON/DTC P0446 Stored In ECM
00-08-48-005D 09/10/2010 Body - Vehicle Glass Distortion Information
04-08-50-006D 09/09/2010 Interior - Seat Cover Wrinkle/Crease/Burn Info
08-08-52-001G 08/24/2010 Keyless Entry - Intermittent/Inoperative Remote
09-06-04-026C 08/14/2010 Engine/Transmission - Aftermarket Calibrations
10-08-98-002 08/06/2010 Body - Drilling High Strength Steel Using CryoCobalt(R)
05-06-01-034L 07/23/2010 Engine - Oil Leaks From Rear Cover
07-02-32-002J 07/23/2010 Steering/Suspension - Power Steering Fluid Leaking
09-03-10-008B 07/23/2010 Wheels/Tires - Module Programming For 20/22 Inch Wheels
07-06-03-002C 07/21/2010 Battery - Battery Cable Bolts/Clamps/Nuts Inspection
10-08-52-003 07/21/2010 Keyless Entry - Transmitter Button Inop/Won't Program
10-03-16-001 07/19/2010 TPMS System - Service And Re-Learning Sensor IDs
06-08-45-008D 07/12/2010 Brakes - Aftermarket Trailer Brake Controllers
03-00-89-008E 07/01/2010 Body - Metal Body Panel Corrosion Protection
03-08-98-002B 06/30/2010 Body - Squeeze Type Resistance Spot Welding/Equipment
06-08-51-005A 06/30/2010 Body - Hem Flange Sealer For Corrosion Protection
07-06-04-019D 06/28/2010 Electrical - Intermittent MIL/DTC P2138/Reduced Power
99-09-40-005F 06/23/2010 Restraints - Extender Availability For Seat Belt
02-08-42-001D 06/21/2010 Lighting - Headlamp Polycarbonate Lens Damage Prevention
07-08-44-001F 06/15/2010 Audio System - Difficult To Install Fixed Radio Antenna
09-08-64-003A 06/15/2010 Instruments - Outside Mirror Adjustment Information
09-08-47-001A 06/14/2010 Body Controls - Unable To Reprogram Body Control Module
08-09-41-002F 06/10/2010 Restraints - Air Bag Lamp ON/Multiple DTC Set
06-03-10-010A 06/09/2010 Wheels - Changing Procedures/Precautions
08-07-30-021E 06/07/2010 Electrical - Electrical Malfunction/Mult
AT 2-3 upshift or 3-2 downshift clunk noise
INFORMATION
Bulletin No.: 01-07-30-042F
Date: February 05, 2010
Subject: Information on 2-3 Upshift or 3-2 Downshift Clunk Noise
Models:
2010 and Prior GM Passenger Cars and Light Duty Trucks
2010 and Prior HUMMER H2, H3
2005-2009 Saab 9-7X
with 4L60-E, 4L65-E or 4L70-E Automatic Transmission (RPOs M30, M32, M70)
Supercede:
This bulletin is being revised to add the 2010 model year and 4L70E transmission. Please discard Corporate Bulletin Number 01-07-30-042E (Section 07 - Transmission/Transaxle).
Important
For 2005 model year fullsize utilities and pickups, refer to Corporate Bulletin 05-07-30-012.
Some vehicles may exhibit a clunk noise that can be heard on a 2-3 upshift or a 3-2 downshift.
During a 2-3 upshift, the 2-4 band is released and the 3-4 clutch is applied. The timing of this shift can cause a momentary torque reversal of the output shaft that results in a clunk noise. This same torque reversal can also occur on a 3-2 downshift when the 3-4 clutch is released and the 2-4 band applied. This condition may be worse on a 4-wheel drive vehicle due to the additional tolerances in the transfer case.
This is a normal condition. No repairs should be attempted.
ITS NOT A BIG DEAL (the clunk).
If it's going to eat at you, as soon as you make enough payments on your truck to have equity, dump it if it bothers you that much.
Or you can keep it and be unhappy and keep posting on Edmunds.
I apologize for your frustrations. If you are unhappy with the diagnosis from that dealer I would definitely recommend getting a second opinion. I would recommend riding with the technician so you can point out what it is that you are experiencing. Can you please email me with your VIN? I look forward to your response.
Christina
GM Customer Service
I decided after all that I couldn't pass up the truck deal. I bought a Silverado 1500 LT Texas Edition crew cab with leather interior yesterday for $10624 off of sticker including 3391 GM card rebate plus 4505 GM bonus cash for this area. It still wasn't cheap- most expensive vehicle I've ever purchased by 10K. Hopefully GM will honor the powertrain warranty if I got one of the problematic units. I didn't feel or hear anything to worry about on my 5 mile test drive, although the acceleration and braking were nowhere near as responsive as my Buick sedans. I decided I could get used to it. I also bought peace of mind by extending the bumper to bumper coverage up to 100,000 miles (unlimited time duration). Wish me luck, guys!
Your right, vehicles go up in price every year. This truck discounted the way they are makes them so much cheaper than the competition. You can't touch a Ford, Dodge or Toyota for the same price paid and equipment.
thanks-
Dan
thank you,
Clint
IT SLAMS!
Literally, there's a metallic bang, then "slam".
The "District Specialist" spews the GM mantra; "It's operating as intended." I asked the DS if the engineers "intended" for the transmission to slam. Answer: "you need to take it back to the dealer!" During one conversation she actually asked what octane fuel I'm using!
According to a consumer affairs attorney, GM has used that phrase, "operating as intended", for years when they have transmission issues and don't want to address them.
My 2011 also pulls right since new (alignment attempted w/ no improvement), growls when in AFM, and on a rare occasion the transmission slips. The torque converter was replaced less than a week after delivery to address the slip. That didn't help.
Now the A/C cuts out sporadically. It's four months old! What in the world?
That's right, it has to adjust to my driving habits!
"Just drive it" doesn't cut it when you spend money on something like this.
If you have a newer GM truck and have any of these issues, keep contacting GM.
After filling up in Mesquite where the temperature was 111 we headed out across the desert back to Southern Calif. The outside temperature at Baker, CA was 116 degrees. It stay nice and cool inside the Crewcab with the automatic temperature control set to 74degrees. The AFM would work as designed coming down the hills and switch to 4cyl. mode. The temperature of the transmission climbed to the high 180s through the desert heat.
Arrive back in Southern California the average mpg was 18.5 (drove a little faster through the desert).
The truck rode and operated great. My only critique is the transmission to me is too quick to downshift at highway speeds. I suspect this is programmed in to the software for some reason.
The truck has 6,000 miles on it in three months. Is the automatic transmission the most refined? No - It does occasionally "clunk". My '05 4Ruuner which I traded in was "over engineered". It ran great for 95,000 miles.
If you can't laugh at throwin' over 30 thousand dollars down the drain, what can you laugh at?
i have read the gm responses from chuck1 and chuck1919. it is really disgusting when you hear "if you don't like it, dump it" and "it is operating as designed".
just because gm says nothing is wrong doesn't mean NOTHING IS WRONG.
my truck continues with the same problem of searching for a gear between 30-50 mph.
and yes it will sometimes CLUNK. if this occured all the time i would agree that it was designed this way. but, because of its interrmittent nature it could not possibly be designed to operate this way! it is unfortunate that our gm posters(chuck1 and chuck1919) are trying to suppress the conversation on this issue. the only way we are going to get this fixed is to continue discussing this and continue to push gm to find an answer.
No one is trying to suppress ANYTHING. Does the transmission clunk occasionally? Yes - this is exactly why it will not be fixed (probably) by GM. Do you like your truck otherwise? If you do then you need to overlook this fault. Because the 12 or 13 people on here is not enough to have GM repair this fault (if you want to call it that). Does your truck get you to your destinations in a reliable manner? MIne got through the desert in what can be described as very harsh conditions. (See my post above). And you can notice that I did say it does OCCASIONALLY clunks.
If it eats you up and keeps you awake at night...dump it. If it works otherwise and gets you to from point "A" to point "B" then it's not as big as a problem as the 12 or 13 posters on this board make it out to be.
GM has a bigger problem, trying to figure out how to move a 120 day inventory of GMC/Silverado trucks.
You said it searches for a gear between 30-50 mph. Try this if you haven't already; drive it with the "Instant Economy" LED on. If it searches for a gear while it's bouncing back and forth between 4 and 8 cylinders, that "search" you feel is the "Active Fuel Management." Mine does that. It growls in 4 cylinders then lunges a bit when engaging all 8 cylinders.
Mine really can't decide what to do in the mid 40 mph range. Especially around 47 mph.
The AFM is so annoying, on long trips, I actually drive in manual 5th gear to keep from continuously bouncing back and forth from 4 to 8 cylinders.
Lets keep trying to get GM to fix this fault (and the other problems with this drive train).
In fact the situation is getting worse as it becomes safety hazard... The trans. Sometimes shifts suddenly especially when slowing down at intersection that makes the car jumps forward out of control and that will result in hitting any thing close in front of the car. I am not sure what to do... I am thinking seriously to sell it.
The question now
So the transmission is "downshifting" and this causes it to lurch forward? I thought as a transmission downshifts it slows the vehicle down.
Please explain? Also, how is it out of control?
i thought that this was possibly the issue also.
i even asked my gm service manager if the AFM could be disabled and then
let me drive for about a week to see if that was the problem.
he said it could not be done.
i have driven thousands of miles monitoring the 4cyl to 8cyl and vice-versa to see if this was the issue. it does not correspond to the surge/searching transmission problems that I continue to experience. Aggravating as hell!
But then I remember, IT WAS DESIGNED TO INTERMITTENTLY SURGE AND SEARCH FOR A GEAR. RIGHT CHUCK!
Larry
Who is everyone complaining to? I want to express my dissatisfaction with GMC.
My clunk is actually a slip then "slam".
I've spoken with the dealer, a GM customer service rep and more than one "District Specialist" over the past four months.
If you go that route, be prepared. It's an orchestrated, well-versed run-a-round!
Also, an attorney advised me to write to the address in the back of what my dealer calls "my little owner's book" and ask for some relief. I haven't tried that.
let me drive for about a week to see if that was the problem.
Switch your truck to manual mode, move the gear selector to 5th, the AFM will never kick in.
I have done this and the truck/transmission never has the problems.
But, i should not have to operate this way to avoid the transmission
issues.
I'll try slipping it into manual and/or tow/haul mode.
I believe a "lemon design" would be a faulty transmission that fails prematurely or doesn't work at all. This transmission does shift and functions and shifts thorough the gears.
It does - at times clunk.
I recommended (to lstrip) trying manual mode only as a diagnosis, not as a solution. (he already tried that anyway!).
I use manual 5th on long trips, however, I'm continuing to tell GM I want the AFM growl/lag/bang and other issues addressed with something more than "it's operating as designed." The dealer "sold" me on the 6 speed. I didn't pay for a 5 speed manual.
This is not an exaggeration; during a 25 minute trip on a level highway, my truck will move between 4 and 8 cylinders close to 60 times. You can feel the growl, lag, subtle bump every time. It's annoying.
In addition to the AFM, transmission issues (one of which is dangerous) and banging noises; my truck's A/C has started to cut in and out!
My truck is not well-built either.
When my truck switches to 4cyl. mode it's smooth and seamless.