TRANSMISSION NOT SHIFTING?

RLSTEH

MEMBER
1997 CHEVROLET SILVERADO
V8
2WD
AUTOMATIC
234,000 MILES

I have a 1997 Chevy Silverado, 2WD, 1/2 ton, automatic w/ overdrive - 234000 miles.
The tachometer, speedometer, odometer and gear indicater would sometimes stop working and transmission will not shift. Problem steadily got worse til the problem was almost constant (would work every now and then and for no reason) It could be manually shifted but only between 2nd and 3rd gear. All other gauges are ok.
Code reader indicated several transmission problems so I replaced the transmission with used one. Did not solve the problem, Check engine light is still on but code reader shows no faults. Unable locate likely wiring or connections.
Any suggestions?

2 Replies

DENNYP

MECHANIC
1,824 POSTS

When this happens, check the trans 20 fuse for power. If you don't have power on the fuse, replace the ignition switch.(Not to be confused with the ignition lock cylinder)

Let me know what you find.

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Saturday, December 15th, 2007 AT 3:38 PM

KEN L

MASTER CERTIFIED MECHANIC
48,363 POSTS

I have seen the cluster short out and caused this but I have also seen the PCM have problems as well. We need to get he codes to see what's going on, here is a guided that will help

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Here is how to remove the cluster so you can get another one of have your rebuilt if a code comes up for it. Check out the images (below). Please let us know what happens.

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