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Repair guides and support for C/K pickup trucks sold by General Motors under the GMC brand, including the GMC Sierra.

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Transmission won't go when put in 1st or 2nd gear

I have a 1994 gmc 4x4. When you put the truck in 1st or 2nd it will not go. When in drive or over drive it shifts through all gears with a small slip between 2nd and 3rd. Anyone know what may cause this

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This is sounding like a transmission problem. I would take it to your nearest auto repair shop and have them take a look at it, as gear slipping and not going on certain gears is a clear sign that something is wrong with it.

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I know it's a transmission problem just trying to see if anyone has had similar problems and what the cause of it is

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What transmission is in it? Sounds like your friction plates are what is causing the slip. But also if it isn't a physical issue preventing movement, it could be solenoid issues if it is an electric trans. Hence why I asked. I have a couple of transmission repair manuals that also have a troubleshooting section.

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4l60e transmission

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