Quote:
Originally Posted by Old Tele man
FWIW, GM electronic speedometers are typically 2 mph higher than reality, but the odometer "seems" to be fairly 'close', but seldom perfectly accurate.
We've had all our recent GM vehicles "calibrated" on a chassis dynometer by the shop that has the contract to calibrate the AZ highway patrol cars, so I feel the above info to be 100% verified & valid.
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It seems like most vehicle - I've confirmed this on a bunch of Fords and a few Chryslers.