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false reading


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paulrice
User

Dec 24, 2009, 10:21 AM

Post #1 of 5 (1947 views)
false reading Sign In

2003 gmc envoy 97000 miles odemeter says i am going 50mph when i am going 25 or 30mph and sometimes when i come to a stop it reads 20mph


Sidom
Veteran / Moderator
Sidom profile image

Dec 24, 2009, 10:45 AM

Post #2 of 5 (1938 views)
Re: false reading Sign In

Could be a speed sensor problem. Is the check engine light & is there any codes? Does run or shift poorly?

Those also have had a problem with their clusters....


steve01832
Veteran
steve01832 profile image

Dec 25, 2009, 3:50 AM

Post #3 of 5 (1933 views)
Re: false reading Sign In

Hi Paul. I am wondering, does the vehicle have alterations? Are the tires the factory size? Putting a different size tire on can impact the VSS and cause the computer to shift the trans. erratically.

Steve


paulrice
User

Dec 25, 2009, 10:49 AM

Post #4 of 5 (1928 views)
Re: false reading Sign In

no nothing was done to the truck


paulrice
User

Dec 25, 2009, 10:51 AM

Post #5 of 5 (1927 views)
Re: false reading Sign In

no light is on and it seems to shift ok






 
 
 






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