Not shifting

I have 1995 Chevrolet K1500 Silverado that my tachometer, speedometer, gear position indicator and odometers would not work off and on. When this happened, the transmission would start off in tall gear making it very hard to get the truck moving. Mechanic and his techs were able to troubleshoot to two different issues. My issues may be different than other trucks with the same symptoms but the Instrument cluster needed repair and ignition module needed replacement. Mechanic took the time to troubleshoot this electrical issue and was very fair on his pricing.

Electrical problem V8 Four Wheel Drive Automatic 191,000 miles.

My tachometer and speedometer quit, my transmission stopped shifting. Will go into gear forward or rev but seems to be starting out in higher gear and does not shift. The transmission indicator light dose not work. Tried new gauge cluster still no change. Plugged scanner up it dose read rpm's and speed. This all happened at the same time. I am thinking ECM problem?
No fault codes logged.
Thank you

I fixed this myself. It was my ignition switch it feeds power to the transmission fuse in the run position and gauges. Posted this to help someone else.

Hi there,
Just this morning I believe I had a very similar thing happen. Everything quit working, engine revved, but it was not moving to well. I stopped and turned the truck off then on and the gauges came back but transmission was still not right. When I shifted the transmission into second the speedometer/tachometer/gear indicator all quit working again.

I have an appointment at the shop tonight. I will suggest they consider the ignition switch, although not quite sure if it is the same.

Thanks.

There is a little white plastic box located behind the glove box. This unit controls the speedometer in the dash, that might be affecting shifting. Try going to the salvage yard to find a replacement part.

Six cylinder two wheel drive automatic 135,000 miles

The tachometer and the speedometer stopped working on my truck, and the transmission does not shift. It starts and stays in third gear. I was told to check the fuses and they were alright.

Will not shift into overdrive.

I just recently put a big block 454 in my truck and did away with all the electronics, now when I drive it my transmission is winding way out and shifting real hard. It acts like the old transmission vacuum module is not hooked up, but my transmission does not have one. What do you think the problem is?

Thanks.

V8 four wheel drive automatic 105,000 miles.

Rear end was recently replaced with new differential, ring and pinion. After rear end work was completed, transmission will not go into gear and go forward when placed into drive. Will work in reverse, and placing into first gear manually, but will barely want to move in drive. All fluid levels good, transmission was rebuilt about one year ago and has always worked properly prior to rear end change. Yoke seal at drive shaft was replaced also when leak was noticed while doing rear end work.

V8 four wheel drive automatic 198,000 miles.

I have a K1500 Z71 extended cab it has a 4l60e and the transmission will not shift and the speedometer will not work. The day it happened I got under the truck and found the wire harness for the transmission sitting on the front driveshaft, it did not pull the wires it had just chewed them up. So I put them back together and now the transmission will not shift and the speedometer will not work. I have checked every fuse under the dashboard and I have changed the ignition switch under the dash. Please help this thing is driving me crazy.

Will not shift first, second and third.