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Chevy Silverado and GMC Sierra Transmission Problems

503 messages,  Last post on Nov 10, 2009 at 5:28 PM

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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

#382 of 503 2008 GMC 1500 Transmission Problems by pkbroiler Jan 13, 2009 (7:51 am)
I have a 2008 GMC 5.3 Auto ( 12,000 miles) with a front seal leaking. Took it to my dealer for a warranty repair. Seal was replaced and I had the truck back in a day. 3 to 4 days later the transmission just quit working going down the road . No nothing. GM roadside assistance towed it to my dealer and they determined the torque converter and a pump needs to be replaced. How long does it take a dealer to get the parts and what may have happened? Transmission worked fine till the front seal was replaced. Dealers answers seem funky to me. I just need some thoughts and other ideas from people.
#383 of 503 2008 gmc sierra transmission issues by pondrocker Jan 13, 2009 (11:40 am)
Hello, need some advice on a 2008 GMC 5.3 4 speed auto, 4x4 Z71 pkg. I am experiencing the same issue as user name Frock10 post # 332. My first incident happened at 3,000 miles, they replaced the 3-4 clutch pack with one that had tighter clearances per an internal bulliten that the mechanics are unable to see, sorta scary. 2 different gm service dept. referenced the internal bulliten, both said it wasnt the usual 2-3 clunk. The mechanic I chose has 35 years experience and I have used this service dept for years and never had an issue/ flawless service. After the repair the tranny was great, even better than before the fix probably due to tighter clearances. The fix failed 575 miles later, it is better due to different clearances but there non the less. Brought it back angry and concerned and they slapped a 2-3 cluck bullitin on it and told me I have a warranty just drive it. The truck is now black listed & I am being denied service if I even mention the word tranny. 4,100 miles on it now, cant even get it fixed myself without voiding the warranty. Something is fishy here and not right, any suggestions and solutions would be greatly appreciated. Also does anyone know how I can get in contact with user name fronk10?
#384 of 503 06 gmc sierra transmission problems by judice3 Jan 08, 2009 (3:33 pm)
#385 of 503 06 gmc sierra transmission problems by judice3 Jan 08, 2009 (3:33 pm)
I noticed that my trans. is leaking at the end were it meets the shaft. I checked my fluid levels and it looked fine. When i press the gas I take off normally, but if I let off of the gas i slow down abruptly. I contributed this to not letting my engine warm up enough, because when warmed up it acts normal. Any ideas?
#386 of 503 Start in 3rd gear by byancey Jan 13, 2009 (5:24 pm)
Just took my 2004 GMC 5.3/Z71 to trans shop because it was starting off in 3rd gear, and wouldn't downshift. Turn it off, restart, no problem. Showed trouble code (not sure which one), and mechanic said might be short in harness from computer/transmission. Checked solenoids and all were ok.   Anyone else have this? Thanks BY Replies to this message: byancey (Feb 08, 2009 5:36 am)
#387 of 503 Disregard my last post by pondrocker Jan 13, 2009 (6:42 pm)
My mistake, disregard my last post, I had'nt read some of the other posts regarding issues with the 07-08 GMC sierra/silverado before naeivly posting about my transmission issue. This might be the least of my worries as I too also have problems with the Advanced Fuel Management system, floor board vibrations, sporatic fuel milage, vibrations in steering column, louder exhaust, & (freaky/scary) engine surging all at 4,100 miles, other than that I love this truck. It sounds like regardless of the problem the end result from GM is the same, this is "normal" operation, maybe it really is normal? I thought I was nuts!, glad to hear I am not alone, it actually has made me feel better. My 1st new car experience lasted 3,000 miles, sad but true, live and learn. If anyone has a solution for all these issues I am all ears, sorry to sound so cynical!
#388 of 503 trans problems with my silverado 2000 2500 by joesmithjr Jan 16, 2009 (9:12 pm)
Hey I have a 2000 2500 with the 6.0 in it. Im not sure exactly wat the trans model is. but wat that problem is its not going into lock up anymore. A year ago I was going around 45-50 mph and the kid in the front decided to get something from the back sit. well wen he did he hit my shifter into reverse and all i heard were the tires scretching iit maybe stayed there for 2 seconds b4 i threw it into N. amazingly never had any problems with it at first after that. Until bout 3 months ago now it will not go into lock up over 40 mph. any ideas??
#389 of 503 95 sierra no reverse or 1st gear engine brake by bomb_tech04 Jan 17, 2009 (7:07 am)
i have a 95 sierra, 4l60e trans. that is really weak in reverse. it barely pulls the weight of the truck. i tried the (engine brake in 1st) and it doesnt brake, just acts like it rolls through, all gears foreward pull fine, just problems with reverse. i changed the fluid and filter, no shavings in pan, and the fluid level is spot on.
#390 of 503 2008 1500 silverado trans leak by cac4 Jan 17, 2009 (6:33 pm)
Hello I have a 08 4x4 with the 4.8L, w/21k. For the second time in 2 wks the truck is in the dlr for a trans leak. The dealer is cool about it, but it is not acceptable. Yeah shit happens, but GM need to get there shit straight. I was going to buy a toyota, but I live in the metro det. area and decided to give them one more chance. May be the last. I will update this post with what seal was replaced the first time and what they say the second time. I just wanted to know if anyone else had any leak issues with their new trucks?????maybe a ???
#391 of 503 98 silverado overdrive problem by slayer10 Jan 19, 2009 (9:25 pm)
hi guys i am new to the site so i hope that the info. that i submit is enough. its a iffy situation. sometimes while driving the trans. will shift into overdrive, but most of the time it will not. i have changed both the transmission module switch, and the safety neutral switch and it still does it. someone please help! Replies to this message: bumperdude (Jan 19, 2009 9:44 pm)

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