how do I calibrate the speedometer on my 92 Silverado shows 85 at 65mph

Asked by Nov 20, 2015 at 09:14 PM about the 1992 Chevrolet C/K 1500 Silverado Standard Cab LB

Question type: Maintenance & Repair

At 45mph Speedo shows 53 at 65 it shows 85 on gages currently I have
235/70r15 should I use different size tire of is speedometer in need of
calibration?

2 Answers

65,745

Did you install really short tires? Your truck probably drives the speedo from the transmission. If so you can change the drive gear to match your tires. Electronic speedos can be changed with a programmer.

1 of 1 people found this helpful.
67,465

If your truck was originally delivered in Canada it might be showing your speed in Kilometers per hour instead of Miles per hour. Just a thought. HTH. -Jim

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