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GMC
Sierra
Interior
Instrument Cluster
Gauges
Speedometer
Not Working
how to tell if the speedometer or the speed sensor is bad
1988 GMC SIERRA
D45197
MEMBER
1 POST
my speedometer doesn't work. how can i tell if i need to replace the speedometer or the sensor?
Dec 23, 2011 at 5:24 PM
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RASMATAZ
✓
Experienced Mechanic
75,988 POSTS
Check the VSS 1st, if it test out then you go to the speedometer assy
Dec 23, 2011 at 5:50 PM
D45197
MEMBER
1 POST
Ok,what is the process for checking the VSS, and speedometer?
Dec 23, 2011 at 10:06 PM
MHPAUTOS
✓
Experienced Mechanic
31,937 POSTS
A diagionstic scan will normally show up a faulty speed sensor, this code will not set a check light, do a scan first.
Dec 25, 2011 at 12:19 AM
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