speedometer needle seems to stick and jump?

2003 CHEVROLET AVALANCHE

77,000 MILES • V8 • 2WD • AUTOMATIC

JESSEMOURING

MEMBER
1 POST
FOLLOW

when i speed up or slow down, my speedometer needle seems to stick and jump. sometimes when i turn my truck off, the need sticks at a certain speed. also, my oil pressure gage sometimes stays at zero when i turn my truck on.

Dec 23, 2008 at 2:33 PM

SQM

CAR REPAIR CONTRIBUTOR
6,383 POSTS

Hello,

It sounds like you could have a faulty vehicle speed sensor (VSS).
This issue can also happen due to a bad stepper motor which controls the speedometer.

The VSS is located on the side of the transmission right before the output shaft (see diagram).
Overtime due to heat and vibration the VSS can loose its internal calibration.
It can also have a loose or corroded electrical connector.
It cab be replace relatively easily.

https://youtu.be/f3bETtCIdxM

I have attached diagrams for your reference.

Please let me know of any questions.

Thank you.

Images (Click to enlarge)

Aug 23, 2021 at 10:23 PM

Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.