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#1
03-30-2007, 09:02 PM
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1997 GMC Sierra 4X4 Speedo question?
Hello all,
I just bought this truck last Friday, the truck has the stock tire size on it 245/75R16 on it. The speedometer reads 7 miles per hour faster then the truck is actually going. Would this be the speed sensor going bad? No check engine light and the truck runs great. Thanks, Sellncars
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1999 Chevy Malibu, 3100V6 VIN J with 73,000. 1997 GMC K1500 EXT cab, 350 Vortec with 164,000 
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#2
03-30-2007, 11:03 PM
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Re: 1997 GMC Sierra 4X4 Speedo question?
Quote:
Not usually. First thing get it on a engine/transmission capable scanner and check the MPH reading in scanner with the speedometer reading. MT
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Remember proper testing gives us the answer to many problems. MT
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#3
03-30-2007, 11:36 PM
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Re: 1997 GMC Sierra 4X4 Speedo question?
It is possible that the previous owner had been running a bigger tire and had the ecm reprogrammed.
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NO 4 N JUNK  1994 GMC K1500 XC 5.7L 2008 Chevy Impala LTZ
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