1994 Chevy Silverado 1500. Brake light is on truck won't shift out of first gear an speedometer is out .. Brake light is out truck runs perfect? Any ideas?

20

Asked by Dreamin Mar 13, 2018 at 07:40 PM about the 1994 Chevrolet C/K 1500 Silverado LB RWD

Question type: Maintenance & Repair

I have replaced the ECM and speed sensor on tail
of transmission and brake light switch. When the
brake light is on the truck has no speedometer and
wont shift out of first gear. When the light is out the
truck runs and drives perfect. I'm running out of
ideas tired to read codes by jumping A an H with
no luck did not work or do anything.

9 Answers

61,205

You've got a wiring issue with that citcuit. Seems intermittent, easy thing to try is to replace the connector for the speed sensor on the trans. After that it'll be difficult

2 people found this helpful.
20

Hey Andrew thanks for the answer back ... I have already replace the sensor on the tail shaft believe that's the speed sensor

20

Misread your answer back ur saying try the connection to the speed sensor got ya

40

I"m having the exact same problem with my 1994 2500 chevy cheyenne. What was the solution?

1 people found this helpful.
20

My problem with my 1994 Chevy 1500 2wd .. ended up being the fuse box in the dash on driverside was lose and moving around

2 people found this helpful.
40

Thanks, I have noticed sometimes jiggling the wires did make the problem go away. I figured it was a lose wire. I try to pin point it by checking the fuse box. Which fuse box was it? Was it the one under the dash by the brake pedal?

3 people found this helpful.
10

Anybody found the problem I’ve replaced the radio in a 94 GMC Sierra and now it want shift to overdrive

1 people found this helpful.

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