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  1. #1

    Default Speedometer reads 10% high.

    Ok, i just finished replacing the stepper motors in my cluster on my 04 Silverado and nothing changed. My speed and odometer read about 10% high. I do have the larger 265 tires instead of the 245's but the speedo and odometer should be out 3-4% on the low side. I'm baffled, is it time for a whole new cluster? Would a speed sensor maybe correct it?

  2. #2

    Default

    Quick way to tell if it's the cluster is to attach a scanner and look at the VSS. If the VSS is correct on the scanner then your cluster is bad. If the VSS reads fast then you might have a bad sensor.
    Jim

    2004 SILVERADO 2500HD LS
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  3. #3

    Default

    Quote Originally Posted by Jimmiee View Post
    Quick way to tell if it's the cluster is to attach a scanner and look at the VSS. If the VSS is correct on the scanner then your cluster is bad. If the VSS reads fast then you might have a bad sensor.
    vss? what is that?
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  4. #4

    Default

    Sorry. I hate it when people do that and I just did it myself!

    VSS = Vehicle Speed Sensor
    Jim

    2004 SILVERADO 2500HD LS
    Pro Comp Leveling Kit
    285-75-16 Cooper ST All Terrains
    Pro Comp Programmer
    Bilstein Shocks
    Linux Bed Liner
    Tinted Windows



    Other rides:

    1967 Landcruiser <350 Chevy>
    1970 Camaro
    1990 Geo Metro Convertible
    2007 FJ Cruiser

  5. #5

    Default

    Not entirely related but I read in Car and Driver that manufacturers actually set the vehicle speed slighly on the high side in order to ring up mileage faster and get their vehicles off of warrenty. Just an aside... surely not your problem. Using my handheld GPS every vehicle I've been in only reads 2-5 mph high above 50 mph, and they all seem pretty close below that threshold.

  6. #6

    Default

    Quote Originally Posted by jchambers849 View Post
    Not entirely related but I read in Car and Driver that manufacturers actually set the vehicle speed slighly on the high side in order to ring up mileage faster and get their vehicles off of warrenty. Just an aside... surely not your problem. Using my handheld GPS every vehicle I've been in only reads 2-5 mph high above 50 mph, and they all seem pretty close below that threshold.
    x2. My 1500 does it now as did my ZR2 blazer. Pretty much every vehicle that I drove with a GPS the speedometer was high once I go about 50 or 60mph.
    Mindi
    1998 1500 Silverado Z71
    2006 YFZ450

  7. #7

    Default

    Your computer needs to be reprogrammed for the tire size you have. Some tire shops will do this for you, the dealer will do it for you (for a fee) or you can buy a programmer (hypertech, etc...) and reprogram it yourself.
    Gary

    99 K 1500 Suburban
    78 Silverado Big 10 w/factory 454
    00 S-10 Blazer
    1976 Trans Am
    1980 Honda CB900 Custom

  8. #8

    Default

    Tire size is the one thing that pops into my mind. I can remember with my old truck, when i got new tires, it read faster also.
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