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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


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#179 of 506
Allison Transmission/battery light problem by shondyracing
Nov 24, 2007 (12:41 am)
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I have a 2005 silverado 3500 4wd with the 8.1L. My problem has me stumped. I started the truck early in the day, started to work and the trans light came on. The truck would not shift right. I hooked up the hypertech and got the codes for sensorA, B, C, D, E,. I checked the plugs all was fine. I cleared the codes and the truck shifts fine now. BUT the battery light stays on after the truck is turned off and it drain the battery. I dont know if its grounded out or the ecu is fried........
#180 of 506
2007 NBS Silverado Transmission Woes! by hotsaucebill
Dec 02, 2007 (11:49 am)
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Hi, I'm new to this board, please be gentle. Thanks! I have a new (4890 miles) chevy silverado with the 6.0 litre Vortek Max and auto 4 speed tranny. Everything has been great up until this morning. Drove it to church, got in it ready to come home, and notice there is no indicator marking present to let me know what gear I am in. Waiting to get out of the parking lot, a loud click comes from somewhere in the dash every time I release the brake pedal. Now, I get her out on the road and BAM! She shifts into 1st gear hard enough to throw me back in the seat, same with second. I finally get her home, switch off the engine, and check the tranny fluid. Bright red and right on the mark where she should be, so I get back in it and try it again. This time the indicator light under the gear selections reappear, and I drive her about a mile down the road shifting flawlessly when...BAM! engine service light comes on, clicking back in the dash, and even more harding shifting limping back home. Of course, I will be at the dealership first thing tomorrow morning, but wondering if anyone out there has any ideas or experience with this problem? Thanks in advance!
#181 of 506
07 transmission by bumperdude
Dec 02, 2007 (1:01 pm)
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Mine is an 07 new body style. bought it last Dec right after they came out. at 7,000 miles mine didn't make a noise at all it just freewheeled and seemed to be in neut. after i let it cool for 10 min it would go again for about 5 miles. when i got home i put the keys under the mat and left it in the street and called the dealer. when they opened it up they could not find all of the lock rings that should have beenin the tranny.
    they ordered all new stuff. it has 18,000miles and hasent missed a beat. I had a cat back system put on it at 17,000miles so it could expell more exhaust. sounds better seems to run better and i have picked up mpg from 10.6 to 11.5. also at about 17,000miles it has picked up some pep at low speed. good luck.
#182 of 506
Re: 07 transmission [bumperdude] by hotsaucebill
Dec 02, 2007 (2:30 pm)
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Replying to: bumperdude (Dec 02, 2007 1:01 pm)

thanks bumperdude for the post. I'll let you know how this all turns out. so far, no freewheeling. I'm thinking something with the computer, as it cleared up for a while. miss the good old days in a way....without the software!
#183 of 506
Re: 07 transmission [hotsaucebill] by hotsaucebill
Dec 03, 2007 (1:47 pm)
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Replying to: hotsaucebill (Dec 02, 2007 2:30 pm)

Just got back from the dealer. Turns out a transponder that sends transmission fluid pressure to the ECM went out of whack. GM had a TSB on the problem, so they hooked it up to the computer and reset every thing. Time will tell if it happens again. According to them, this was the first time they had seen this problem at their service department. Obviously, it wasn't the first time the boys in Detroit had heard about it. All is well for now. Love my truck!
#184 of 506
Re: 1998 1500 5-speed issue! [beaverman] by 1offroader
Dec 03, 2007 (8:25 pm)
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Replying to: beaverman (Nov 17, 2007 6:48 pm)

beaverman
 
The idiot at the car lot was right. The slave cylinder is bad. Near the clutch actuating arm is a smaller clutch slave cylinder. There is a piston inside, and it has seals on it that can go bad, just like on a brake wheel cylinder. Sometimes they can be honed out and rebuilt with new seals, sometimes not. It is a common problem.
 
It could also be the clutch master cylinder, but check the slave first. It is smaller, easier, and cheaper to replace than the master.
 
Sometimes pumping the clutch pedal works, just like pumping the brake pedal when the brake master cylinder or wheel cylinder goes bad. But that's just a temporary solution until you can get it home and replace it.
 
1offroader
#185 of 506
What was your problem by tinamatt
Dec 05, 2007 (7:48 am)
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I have an '07 silverado with a scrubbing noise in the motor. Took it to the dealership and was told it was a vibration that could not be fixed. Any thoughts?
#186 of 506
Re: What was your problem [tinamatt] by obyone
Dec 05, 2007 (9:04 am)
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Replying to: tinamatt (Dec 05, 2007 7:48 am)

Like with a doctor. If you don't like the first prognosis, get a second opinion from another dealer.
#187 of 506
transmission issue by vetteboy
Dec 04, 2007 (5:24 pm)
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I have an old k1500 plow truck that was perfectly fine three weeks ago until I got a foot of snow today and I went to plow and had no drive or reverse gears. The fluid is fine. Is it possible that the cable between the shifter and the tranny just broke? If so is there a quick fix im snowed in...
#188 of 506
Re: What was your problem [tinamatt] by bumperdude
Dec 05, 2007 (11:27 pm)
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Replying to: tinamatt (Dec 05, 2007 7:48 am)

i had nothing like that but the answer that they gave is unacceptable. ask to speak to the service manager.

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