[phill100]

Has anyone seen a difference in the digital readout speed (information center) when you first set the cruise control compared to the actual speedometer reading? I notice that the actual vehicle speed is 1-2 MPH higher than the set/displayed cruise speed even after driving a mile or two on flat pavement. I verified with a GPS that the speedometer reading was accurate (I hope so). I have an 09 Traverse 2LT.

 

[medman]

Yup...speedometer is higher than digital cruise display....don't think it matters....

medman :beer:

 

[Tiestosteele]

It caught me off guard when it showed the speed, didnt know it did that. Very cool I thought. Never really looked that hard to see if it was off 1 or 2 mph's, not really a big deal to me.

 

[phill100]

I agree it doesn't really matter, just thought it was interesting that they didn't match up.

 

[rbarrios]

I noticed on my 2010- that what was shown on the DIC (cruise) matched the needle on the cluster...(60 MPH).

Ill test again at other speeds.

 

[splat10]

my 09 matches. They might not match when i push the button but the speedo settles to the number on the DIC after a couple of seconds or the acceleration is done on a resume.

 

[WhiteTrav]

My 09 is off by 1 MPH. I decided to check it using my GPS and it matches the cruise control reading not the speedometer.

 

[intotheoh]

Mine is off by 1 or 2. Not a big deal.

 

[rubberman]

Just found this out today. The speedometer showed 70mph and when I set the cruise, the DIC showed set at 68.


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[Rocky]

Interesting. Experience with numerous brands over the years shows that speed varies in CC mode.
It can go over on downhills until controlled by the car shifting down ( that one surprised me) and under on up hills until prompted to accelerate.
Then there was the rental overseas with adaptive cruise control that adjusted the speed to maintain a safe distance from the car in front up to the set CC speed. A fantastic feature that Is a must IMHO.

 

[Deping]

Most car speedos are usually out by about 7-8 mph at motorway speeds,4-5mph at lower speeds.I have noticed this on all the cars ive driven compared to a gps reading.
From what I have gathered they are set this way from the factory by the manufacturers mainly to stop any disputes over speeding convictions from drivers who might say their speedo was inaccurate.

 

[bobg1951chevy]

Most car speedos are usually out by about 7-8 mph at motorway speeds,4-5mph at lower speeds.I have noticed this on all the cars ive driven compared to a gps reading.
From what I have gathered they are set this way from the factory by the manufacturers mainly to stop any disputes over speeding convictions from drivers who might say their speedo was inaccurate.

GM's calibration is 3% error. 60 MPH = 1.8 MPH error.