Speedometer reads 60 to 70 MPH when traveling 30 MPH. Anti-lock came on.
Feb 13, 2023 at 1:12 PM
Speedometer not working properly?
1999 GMC SAVANA
MASTERRYK
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Hi,
There is a vehicle speed sensor at the rear of the transmission. See pic below. By chance have you checked it? Also, if you have a live data scan tool, you can check if the sensor is sending the wrong signal while driving.
Let me know.
Take care,
Joe
There is a vehicle speed sensor at the rear of the transmission. See pic below. By chance have you checked it? Also, if you have a live data scan tool, you can check if the sensor is sending the wrong signal while driving.
Let me know.
Take care,
Joe
Image (Click to enlarge)
Feb 14, 2023 at 11:27 AM
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Hello,
This can be caused by one of two things, the VSS (vehicle speed sensor), the ABS module which is what I am leaning towards because of the ABS light. We should run the codes, here is a guide to show you how:
https://www.2carpros.com/articles/anti-lock-system-testing-and-repair-abs
The first thing we should replace is the VSS (vehicle speed sensor) because it is cheap. Here is the location so you can check the electrical connector and sensor and I have included how to change out the ABS module in case you need it. Please check the images below
This can be caused by one of two things, the VSS (vehicle speed sensor), the ABS module which is what I am leaning towards because of the ABS light. We should run the codes, here is a guide to show you how:
https://www.2carpros.com/articles/anti-lock-system-testing-and-repair-abs
The first thing we should replace is the VSS (vehicle speed sensor) because it is cheap. Here is the location so you can check the electrical connector and sensor and I have included how to change out the ABS module in case you need it. Please check the images below
Images (Click to enlarge)
Feb 14, 2023 at 11:44 AM