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The Cons are:
1. It's so quiet that I try to fall asleep on the highway.
The Pros are:
1. I could list at least 200 Pro's over my 2007 Silverado Classic 5.3 (non AFM) and more than half would be technical.
So now you know. This truck is not lacking in any way. I don't really understand why so many people would buy a truck they didn't like or want, ya know? with AFM? Sell it and get a Ford. This truck is my Cadillac and I seriously doubt anybody is gonna improve on what GM has built here with a hack saw underneath it in the back yard.
Just a clue how AFM works...very simple. The cyl's that de act have special lifters. What's so special? They have a locking pin, that's it. Those cyl are de act mode with less than 6% throttle or load...this is decided by several process in less than 20 milliseconds...they are pressurized in de act mode (4 cyl) controlled by solenoids in the oil galley under the intake manifold. If that system was to fail (de-pressurize) it would default to a V-8. It's simple and it works. On a 80 mile drive thru the hills and curves I was able to attain a high average once of 24.4mpg I get 23 often and have got 21 driving 70 mph.
There are alot of parts in this motor that will fail before AFM does...Jeezes. I'm going to put 300,000 on mine then recheck it and see how it's doing then. I have bought 4 new GM vehicles in the last 3 years or so...1 of them had a minor quality control issue that was probably done by the transport driver. 1 was traded on this truck, the 2007 Silverado. It had 86,000 miles on it and zero parts replaced. just tires and oil.
This won't be fun if we didn't get a little OT and throw in something about oil...I do have to admit I did develop the dreaded tick at start-up. I don't know what factory fill was and you don't either unless you put it in. That's why I drained that stuff the same week I bought it. Well I went with Mobil1 I have been running for years no problem and then after say 3000 miles, tick for 2 seconds at start-up every time...then started it sometimes even when warm which raised my brow. And NO it's NOT THE AFM...remember, the lifters have to be pressurized in order to collapse. Anyways, left that crap in there too long but switched out to The Castrol Edge USA made 5w-30 and about 1000 miles later presto! no more tick, at all. none. Mobil1 filter. I don't care what bobtheoilguy says this stuff works and it meets all current GM specs.
Do a search on CSK, cold start knock, and you'll find a ton of info out there.
The last attempt three weeks ago, Chevy Service stopped responding. They say they investigated the concern thoroughly. Right.
See what you think. They still call this normal.
Add to this concern is that the truck feels like it shifts while I am stopped (about 25 seconds). :mad:
The engine speed increases while coming to or at an idle. The last time the vehicle was in to the dealer, Ed Rinke, the service manager looked into the problem and saw the issue that I am having first hand. He contacted Chevy Tech Service who asked the Rinke Chevy service manager to try the same test on other Silverado’s. The result was the same, increased engine speed. The Tech Service explained that it is a known problem with on calibration fix at this time
I contacted customer service (case #71-566-017-460) where Andrew Okkema tried to assist me. He contacted Rinke Chevy who told Andrew there was nothing to do. Tech Assistance says it is normal. I do not think customers expect their vehicle to continue going when they step on the brake to stop. :mad:
I apologize that you are having concerns with your vehicle. Are you currently working with your dealership to resolve the issues? Thank you,
Mariah GM Customer Service
It is great to see GM actually reading and responding to concerns on this forum.
I must say, however, I have issues that are now falling on deaf ears that GM Customer Service calls normal. I have been to the dealer multiple times, just recently last week, with the same result. So, to ask if he has been working with the dealer to resolve the issue means nothing.
I will post my concerns again as a continued update to a posting awhile ago.
See '2007 Silverado Engine Surge'
And last week when I asked for a more technical answer, they said the Chevy Techs says the AFM is shifting from 4 to 8 cylinder, even with the vehicle at 1 mph or after it stops. Now what? I tried "Chevy Customer Service" but because I will not settle they have simply ignored me. I have copies of the emails as well as all attempts to address this issue.
RPM/Engine Surge:
When easing to a stop or after stopping and slowly rolling (by easing off brake, no throttle apply) into my garage, the engine speed will increase surging the vehicle forward. It does not matter if the engine is cold or warm, nor driving for one minute or one hour. The engine speed will increase up to ~1000 rpm or more. The engine speed will surge and slowly come down to ~600 rpm in less than 15 seconds. This problem does not occur all the time, but I can bet on it happening each time I drive.
I apologize that you have a concern with your vehicle. Have you tried going to another dealership for a second opinion? Thank you,
Mariah GM Customer Service
No, I will see if that works.
Now, if another dealership see the problem, just as the original dealership, they will call customer service tech and get the same response. But, I will see if it does not cost me.
I will be the first to admit that you can get a Lemon from any car maker out there, and you can find horror stories of the same reoccurring problems with all the major brands (Fords used to pop out spark plugs and trash the heads, coil packs go out all the time, the new tundra's you'll find posts about people getting the whole motor replaced).
HOWEVER the difference here was the customer service. I tried multiple dealerships, and the service was bad at all of them. I get that you went bankrupt GM, but believe me when I say the SERVICE was the determining factor on why I'll never try a GM product again. Admit you have problems, and do your best to take care of them, not hope the person and problem just goes away. Thats how you get people ranting on message boards like this one. So, just over 36,000 miles, not under warranty, when it broke down again, I replaced the parts and GM wouldn't even re-flash the computer for me to fix a know issue (service bulletin), I gave them my last $134.00 for the computer re-flash.
Anyway, I traded it off and kicked in the bumper while the guy drove it off. It's really to bad because I still loved the way that truck looked (more than my new one), and drove, when it drove, and I wasn't having the strong desire to drive it through the front of the dealership.
My favorite GM customer service incident: I opened a case with the GM customer service line because I couldn't get my truck fixed, they called me while I was traveling for work and closed my case because "I wouldn't comply with taking my truck to the dealership". I was 2000 miles away from my truck on a 10 day trip, what was I supposed to do, fly back to take the :lemon: to the shop...
I have no idea if my new Ford will be any better with customer service, I honestly hope to just never find out.
I am suffering from owning a 08 Sierra truck that is a jeckle & hyde, I love my truck, I hate my truck. I've experienced all the dealership crap as you & too many others have, GM has this down to a science, I agree it would be so much wiser to just fix a thing or 2 & keep people happy & loyal, obviously GM does not. At some point soon I will unload this joke of a truck & hope another manufactor can do better especially in the customer service area of things. Until then I will continue to get the word out that GM does not care about it's customers after the sale nor does it honor its well advertised warranty. A warranty is only as good as the person honoring it. Keep talking people because it truly is the only power we have, good luck to all.
That seems to be a trend for people who own GM vehicles. It's not so bad that the truck has problems, what's really bad is trying to deal with a service advisor who gives you the attitude like he's doing you a favor by listening to you not that he would do anything about it or even care. Now that pisses people off. Been there done that but I must say that it isn't limited to GM dealers.
Good luck with that Ford.
Everyone should take a look at the Dodge & Ford truck forums, you will see very few posts about BRAND NEW trucks, the few posted are probably just your typical bad apples in the bunch, it happens to the best of them. I would stay as far away from these trucks as you can until you see all the daily posts from NEW truck owners diminish, they are all :lemon: Again my point is, Why are we all discussing BRAND NEW GM trucks with problems, anyone????
I worry about people who don't have some knowledge of how cars and trucks work in general. The service rep says, "Ohh just had to replace the lifters, the tech has the heads on the bench right now." Like it is no big deal...don't let them fool you, that's open heart surgery on a motor. You "can" get them back together like new, but they have to pull a huge number of parts off the motor. That just kicks the door wide open for more issues in the future.
When they replaced the lifters they took the heads off the motor and replaced all lifters both sides when the computer told them the 1 cylinder that was misfiring, don't tell me GM doesn't know they have a major problem with this AFM crap!!! I wish I knew enough about the heads to know why you would have to take them off to replace the lifters anyway...
Also, another thing that I found at what seems to be all auto manufactures is that the Power Train warranty appears to be pretty much worthless. It covers just deep internal items that virtually never go bad without something else causing it. So if something else causes the failure (which it will), it doesn't get covered. I actually had an impressively frank conversation at the ford deal with the sales manager, who agreed openly with the above statement.
2010 5.3 silverado. vehicle knocks when starting. it lunges when put into drive. after completing a turn i must allow the computer to adjust before slowing otherwise the lunges accelerates. Often vehicles sound like its missing. owned for 8 months 12000 miles. i am getting 2mph less then when i bought it. Dealer states the computer runs the eng and fuel mgmt system and no trouble code so no problem. This is my 4th silverado and the first time these type of problems have occurred.
I understand your frustration and apologize. Please e-mail me with your complete contact information (mailing address, phone, first & last name), VIN and current mileage, and the involved dealer. I would like to address this issue further with you through email. Thank you!
Christina
GM Customer Service
Please keep me updated on your situation. Feel free to email me directly. Have a great weekend!
Christina
GM Customer Service
Crossing my fingers that it runs as well as it use to.
I would encourage you to contact GM of Canada at 800-263-3777. Hours: M-F 7:30am - 11:30pm, Sat 7:30am - 6:00 EST.
Thank you,
Caron, GM Customer Service
I have a 2007 silverado 5.3 and bought it new. I am a loyal Chevrolet owner and have never bought anything else. At around 50000 miles the truck started to consume excessive amounts of oil and the warning light would come on. The truck was over 3 quarts low. After talking with the dealer thy told me that this was normal consumption. After leaving the dealership the warning light came on again after 1000 miles and I returned to see why the warning light kept coming on if this was "normal"? They then told me they needed to change all my lifters. I was given the truck back and told it was perfect! After about 5000 miles the indicator light came on once again. I returned and this time they told me they were going to "soak" my piston and install a deflector in the oil pan. I told them (after researching experiences on the intenet) that this fix was only temporary and didn't fix the problem. They did not take my word and did the "fix" anyways. After driving 5000 miles the oil was again 3+ quarts low. I have contacted Customer Service, GM Executive offices, the LATimes, and Public Relations with no resolution! I have even been called a "Jerk" by the regional manager at GM! Are they crazy?! We spend 35000 for a truck and they call us jerks when we have an issue that is not our fault!!?? I am very unhappy with GM and they should be ashamed for treating customers (who saved them from bankruptcy) with such disrespect. They are now changing all my pistons and rings ( 3rd time trying to fix) and this osmunda again a temporary fix. They will not replace the engine as they should and are trying "band-aid" fixes. To top it off they only offer a 12000 miles warranty and after that ur screwed! I am very displease and wish I could trade mine in for a Toyota! At least they have customer service and are not afraid of admitting a mistake and Doug recalls! I gues I learned my lesson the hard way! Eating $35000! Buyers beware! The 2011's are the same!
I apologize for the problems you are experiencing with your vehicle. You stated you spoke with GM Customer Service; could you please email me your case number? I would like to look further into your case.
Thank you,
Caron, GM Customer Service
I apologize for your concerns and frustrations. Can you please send me your VIN and Dealer information? Has the dealer tried to involve technical assistance? If not, I would recommend asking them to do so. I look forward to your response. Have a great weekend!
Christina
GM Customer Service
I apologize for the problems you are experiencing with your vehicle. Have you spoken with GM Customer Assistance? Please keep me posted.
Thank you,
Caron, GM Customer Service
kcram - Pickups/Wagons/Vans+Minivans Host
The accepted rate of oil consumption for engines used in the vehicles referenced is 0.946 liter (1 qt) in 3200 km (2000 mi)." " Important: This rate only applies to personal use vehicles, under warranty, that are driven in a non-aggressive manner and maintained in accordance with the appropriate maintenance schedule, with less than 58,000 km (36,000 mi), or driven at legal speeds in an unloaded (for trucks) condition."" Important: This rate does not apply to vehicles that are driven in an aggressive manner, at high RPM, high speeds, or in a loaded condition (for trucks). Oil consumption for vehicles driven under these conditions will be more. "Many factors can affect a customer's concern with oil consumption. Driving habits and vehicle maintenance vary from owner to owner.
Thank you,
Caron, GM Customer Service