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Chevy Silverado and GMC Sierra Transmission Problems

1486 messages,  Last post on May 13, 2013 at 11:26 AM

You are in the Chevrolet Silverado & GMC Sierra Forum.

What is this discussion about? Chevrolet Silverado 1500, Chevrolet Silverado 2500, Chevrolet Silverado 3500, GMC Sierra 1500, GMC Sierra 2500, GMC Sierra 3500, Transmission, Truck

    
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Messages Page 134 of 149

#1330 of 1486 Re: 2008 Sierra Transmission Problems [gmcustsvcsarah] by Lady3bglover

Oct 16, 2012 (8:32 pm)

Replying to: gmcustsvcsarah (Oct 16, 2012 5:44 am)
Ms. Sarah..
 
What I don't understand is why the problems with the 6spd trans? I did have some nominal problems with my trans on '04, and it was taken care of. From reading a good number of the posts, the trans pump seems to be the issue. Correct me if I'm wrong.
 
If I may be so bold and make a suggestion, because of the smoothness of the GM transmission's shift, why not tune the shift points a little later in the RPM's. and let the customer get the full advantage of the 5.3's power?
 
And for those who don't know, the 4.8, 5.3, and 6.0 liter engines are all the same block, just different bore. So there are more than a few parts that are interchangeable.
 
I'm on my 2nd engine, and there are more happy miles on the way!!

#1331 of 1486 GM Truck Clunk by ceb66

Oct 17, 2012 (5:43 am)

Sierra Silverado Escalade Yukon buyers, make sure you thoroughly test drive these trucks before purchase. The 6 speed 5.3 liter AFM drivetrain/powertrain clunk and slam like crazy on my 2011. The 2012s and 2013s have the same tranny motor combo. GM knows about it but won't correct it on earlier models. Not saying the new ones do it. Just saying drive and ask!
 
Hopefully this gives a potential buyer a "heads up."

#1332 of 1486 Re: 2008 Sierra Transmission Problems [Lady3bglover] by lchaney33

Oct 17, 2012 (5:43 am)

Replying to: Lady3bglover (Oct 16, 2012 8:32 pm)
The very simple answer is fuel mileage, that is why we have to deal with a lot of the problems.

#1333 of 1486 You have no clue by chuck1

Oct 17, 2012 (7:38 pm)

The 2012s and 2013s have the same tranny motor combo. GM knows about it but won't correct it on earlier models. Not saying the new ones do it. Just saying drive and ask!
  
Hopefully this gives a potential buyer a "heads up."
 
HALF TRUTH ALERT
 
 Your not saying they don't either. You don't know if there have been any ECM or transmission control updates on the 2012s.
 
BTW CEB-If in fact there are still a few issues-I am sure the Chevy salesman will tell you "Oh Yea, we got these things lined up in the service entrance"!LOL!
 
And you can't tell any issues from a short test drive.

#1334 of 1486 Re: 07 silverado 1500 classic transmission shifting thump b/w 1st & 2nd [sharp06shooter] by lm69000miles

Oct 26, 2012 (4:39 pm)

Replying to: sharp06shooter (Sep 17, 2012 9:19 am)
my silverado 5.3 /4 speed auto Z71 same odd shifting problems 70,000 miles.setup to tow never towed dont live in the hills and i take exilent care of my truck. 3 and 4 gear out dealer dont now why .$45000.00 GM says sorry you need a GM certafied rebuild.Was thinking about a new truck not GM i also purchase a few trucks for my company they.I talked to GM they dont care not sure why ? maby they sell to many trucks and dont whant our busness

#1335 of 1486 Re: 07 silverado 1500 classic transmission shifting thump b/w 1st & 2nd [lm69000miles] by angrygmfan

Oct 26, 2012 (5:19 pm)

Replying to: lm69000miles (Oct 26, 2012 4:39 pm)
2010 silverado 1500 with 43,000 miles. The tire monitor system sensors are already messing up. This is probably the 10th problem I've had since I bought my truck new. Not worth the $50,000 I paid for it. Spends more time in the shop than on the road.

#1336 of 1486 Re: 07 silverado 1500 classic transmission shifting thump b/w 1st & 2nd [angrygmfan] by Lady3bglover

Oct 27, 2012 (1:03 pm)

Replying to: angrygmfan (Oct 26, 2012 5:19 pm)
When you said your tire monitoring is messing up, what have you done to assure yourself you're not driving on a flat?
 
The battery in the transmitter could be going out. 43k mi on a vehicle you should still be covered under warranty, unless you're the second owner.
 
Go old school, get a tire gauge and check it. Do the tires look low? Do you hear a leak?
 
IMO I'd have those sensors torn the hell out, and get nitrogen in at the next rotation.
 
As far as the transmission, have you flushed when recommended, or did you pass it up?

#1337 of 1486 Re: 07 silverado 1500 classic transmission shifting thump b/w 1st & 2nd [Lady3bglover] by chuck1

Oct 27, 2012 (1:29 pm)

Replying to: Lady3bglover (Oct 27, 2012 1:03 pm)
Replacement sensors can be bought cheaper than from the dealer. He would have to go to the dealer to recalibrate. Also, the thing with taking the sensors out is the light on the dash will always be on. There is not an easy way (if possible at all) to turn it off.

#1338 of 1486 Re: 07 silverado 1500 classic transmission shifting thump b/w 1st & 2nd [Lady3bglover] by angrygmfan

Oct 27, 2012 (2:38 pm)

Replying to: Lady3bglover (Oct 27, 2012 1:03 pm)
I have worked on cars my whole life, so I have a pretty good idea of when something is messed up. This many problems should not be happening this early. And I do have nitrogen in my tires. I also do not have a flat. The sensors are messing up. They aren't covered under warranty, however, because they are only covered under the bumper to bumper warranty

#1339 of 1486 Re: CRAPPY TRANSMISSIONS by bigman55434

Oct 28, 2012 (9:16 pm)

Replying to: chuck1 (Oct 17, 2012 7:38 pm)
Ever since GM went to fly-by-wire for their throttle control, and went to 6 speed transmissions, there have been nothing but problems. Of course we all saw the original advertisements that said they did it because "you will get better throttle response". What a joke. The only reason they did it was so they could manage peak torque in the drivetrain, and have a shot at having the transmissions and other under-engineered drivetrain components make it the 5 year 100k powertrain warranty. The end result is an absolutely SHITTY driving experience. Unless you are going to drive it like a grandpa, forget it. The horrible programming in these ECU's and TCU's has resulted in very sluggish downshifting, transmissions slamming into gear and lurching when downshifting from 2-1, and missing shifts altogether. I called the dealer once, and they said it was normal. I asked if it was normal for me to hold 1/4 throttle and 4k RPM's doing 15mph in 1st gear, and them for it to slam into 3rd. This is over the course of 2 city blocks, with no load on the truck. I told the service manager I would bring the truck in once parts were blowing out the bottom of it, otherwise, I knew I would just get the same run around as I did on my 2008 3/4 ton gasser, which shifted like crap ALL the time. GM engineers should be fired for putting this crap on the road. BTW, my current truck is a 2011 Sierra 1500 5.3.

Messages Page 134 of 149

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