Speedometer/Odometer Calibration HELP!

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Speedometer/Odometer Calibration HELP!

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Hummer Forums >> Hummer Lineup >> Hummer H3 >> Speedometer/Odometer Calibration HELP!

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Speedometer/Odometer Calibration HELP! - 5/10/2007 11:53:03 AM

WhtRatCop

Posts: 69
Joined: 3/24/2007
Status: offline

My 35x12.5x18 wheels/tires came on my H3 when I bought it. However, my "extremely knowledgeable"

(Tongue & Cheek) Hummer Dealer told me that the Speedometer/Odometer were not calibrated for my increased wheel and tire size.

I guess my question is who can do this calibration? How long does it take? And, approximately how much does it typically cost? Are there any National Chains that do this?

Thanks in advance!

David

Post #: 1

RE: Speedometer/Odometer Calibration HELP! - 5/10/2007 12:27:45 PM

Dennis

Posts: 7584
Status: offline

When you get your PCM tuned by PCMforless they can do the calibration..

(in reply to WhtRatCop)

Post #: 2

RE: Speedometer/Odometer Calibration HELP! - 5/10/2007 3:34:32 PM

importkiller

Posts: 7254
Status: offline

gotta get the pcm retuned for the tire, there are currently no programmers made for the h3 where you can do it yourself, and the superlift speedo recalibration module does not work with the h3 tranny either.

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(in reply to Dennis)

Post #: 3

RE: Speedometer/Odometer Calibration HELP! - 5/11/2007 5:37:59 PM

07HummerH3

Posts: 331
Status: offline

I had the 35's put on and when I compare the speedo at 70 mph to my after mkt GPS speed indication, there is only about a 1.5 MPH difference - You may not really need any adjustment.

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07 H3: Slate Blue Metallic(a) w/ Tan interior, Lux & Adv Pkgs, 35" MTZ's, Gibson SS Split Rear Exhaust, TrueFlow CAI, Truxxx Lift, Nav System, Monsoon Stereo/CD, SIRIUS, Sunroof, Chrome Brush Guard, Chrome Mini-Grille, Tow Pkg, Silverstars, Roof Rails

(in reply to importkiller)

Post #: 4