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Chevy Silverado and GMC Sierra Transmission Problems

506 messages,  Last post on Dec 01, 2009 at 1:57 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

#455 of 506 key removed when not in park gear by chuck1940 May 31, 2009 (3:14 pm)
My wife managed to turn our GMC Sierra 2001 automatic off and removed key when not in park gear. Now key will not turn, everything is locked up unable to get gearshift in park or to move shift in any way or to start vehicle.
#456 of 506 Re: Auto Transmission clunk [sonny24] by grantorton1 Jun 08, 2009 (8:32 pm)
Replying to: sonny24 (May 13, 2009 5:12 pm) I have a 2001 sierra bought it with 34,800 miles on it. Noticed a clunk every nopw and then. 35,200 on it the tranny went CLUNK and tranny was done......... no forward gears. $1800.00 + enjoy I did.
#458 of 506 Trans Problem by 94chevy Jun 10, 2009 (7:59 pm)
I have a question about my trans, I have a 94 Chevy pick-up with 300,000+ miles on it (yes with the same trans and engine that has never been open) eitherway here is my problem. I have the 4L60E model trans and it is not licking the converter in in its over drive gear (yes it is full of fluid) It did this to me once before and I found that it was the brake light switch, yeah I know sounds wierd but it made since and it was the problem, now I have replaced it again and thats not it this time, I have traced all the wiring that I can find with no breaks or loose wires that i can find. these trans are pretty simple and short of pulling that trans out I am sctatching my head. its probably somthing simple that i am not thinking of. Any ideas?
#459 of 506 1996 GMC Z71 tranny? by jcc1958 Jun 18, 2009 (8:55 pm)
I bought a 1996 GMC Z71 automatic ,the guy told me it had a rebuilt tranny and only had 5,000 miles on it.It did good on the way home but I didn't even make it home with it.First thing I noticed is I was going up a small hill and it started jerking some.I almost got it to my sons house but all gears went out of it so I put it in reverse and was backing up to get in his driveway and it stopped working.Well last nite I got in it and i drove it around the house a couple of times.I would have to put it in gear as soon as it started then after driving just a couple of feet it would stop again no gears and it would make this hissing noise sounds like an air hose to me.I cut the truck off and it would start again and go a ways then nothing again. Now I dont know for sure that it was rebuilt. I hate to have to buy one.Anyone else have this problem? I need Help Thanks in advance.
#460 of 506 In reply to the 1996 Z71 Tranny problems by ruftoyzdawtr Jun 18, 2009 (10:16 pm)
Sounds like it wasn't rebuild, OR it wasn't done right. something could be clogged or not hooked up all the way. Price a new one, but before buying one, price how much it would cost to have a shop tell you EXACTLY whats wrong, if it needs to be rebuilt/replaced then ask how much they would charge. Usually a little cheaper to have it rebuilt, but I wouldn't advise you to tell the shops you talk to that it has supposedly already been rebuilt. Most shops WON'T touch a tranny thats already been reuilt, they will say you need a whole new one. Good luck. Replies to this message: jcc1958 (Jun 19, 2009 12:38 pm) jcc1958 (Jun 19, 2009 2:35 pm) jcc1958 (Jun 19, 2009 2:36 pm)
#461 of 506 Re: In reply to the 1996 Z71 Tranny problems [ruftoyzdawtr] by jcc1958 Jun 19, 2009 (12:38 pm)
Replying to: ruftoyzdawtr (Jun 18, 2009 10:16 pm) thanks I guess the guy knew it was bad he didnt return my calls or emails.I wonder why at times it will go in gear and go about 10 feet or so then stop pulling at all when it does this is makes a hissing noise as i said then you can turn it off then start back up and put it in gear as soon as you do and it will go again for about 10 feet then when that noise starts making that noise it will stop again.I hope its not the tranny I sure would hate to spend that much on it to get it running.I didnt realize that chevy and gmc trans were so bad to go out.I did price a new one they said around 2,000.00 for the trans and labor. Thanks
#462 of 506 Z71 tranny problems by ruftoyzdawtr Jun 19, 2009 (1:08 pm)
Well it depends on the people who have owned the truck, pretty much with any vehicle, if you care for it, it will run well for a very long time. Routine maintenance, etc. We had the same problem, i actually posted about our truck on here too. Ours had an allison transmission in it, supposedly one of the toughest, if not THE toughest tranny there is, and it went out. Our truck is still not running because the guy we had rebuild it, didn't do it right and the gears are grinding putting metal through the valve body and into the fluid, clogging the valves. It currently is stuck in reverse mode and only has 3rd clutch and reverse clutch. I guess it just depends on the job, IF yours was rebuilt then the guy didn't do it right. It also could very well be an over-heating problem or an electrical problem. You can take it to a shop and most places will only charge an hours labor to see whats wrong with the truck. If it comes down to the tranny then you know. Better to be safe than put a ton more money into it and be sorry when you find out that wasn't the problem. Even if you have a buddy who has a scan tool that you can hook into it, If the truck has the ports for one, you can do it free that way, the computer will usually tell you if there are any electrical issues or for example and misfire, which would be a spark plug. vehicles that haven't been well cared for are a pain. Hope some of this helps! =)
#463 of 506 Re: In reply to the 1996 Z71 Tranny problems [ruftoyzdawtr] by jcc1958 Jun 19, 2009 (2:35 pm)
Replying to: ruftoyzdawtr (Jun 18, 2009 10:16 pm) I started the truck today and it ran for about 10 minutes before it went out of gear and it made that hissing (air) noise when it did.Started it back up and it moved about 2 ft..you can tell when it's going to go out because of that hissing noise. an ideas?
#464 of 506 Re: In reply to the 1996 Z71 Tranny problems [ruftoyzdawtr] by jcc1958 Jun 19, 2009 (2:36 pm)
Replying to: ruftoyzdawtr (Jun 18, 2009 10:16 pm) I started the truck today and it ran for about 10 minutes before it went out of gear and it made that hissing (air) noise when it did.Started it back up and it moved about 2 ft..you can tell when it's going to go out because of that hissing noise. an ideas? oh I forgot to put the # I got off of the tranny.. 15671928 no idea what it means.

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