Speedometer correction
#1
Speedometer correction
I own an 05 Silverado 1/2T 2 wheel drive.
It has 18" wheels with large tires. I believe the speedometer is off a little bit.
I am told that the speed cannot be corrected by the computer, that I need an additional electronic control that can be adjusted. Is this correct.
A speedometer shop is the place that told me the above.
What are my options for having the speedometer read the correct speed ???
It has 18" wheels with large tires. I believe the speedometer is off a little bit.
I am told that the speed cannot be corrected by the computer, that I need an additional electronic control that can be adjusted. Is this correct.
A speedometer shop is the place that told me the above.
What are my options for having the speedometer read the correct speed ???
#2
CF Senior Member
My 2004 Silverado has the same issue. It had 16" tires & rims installed from the factory, but a previous owner replaced them with 17-inchers from a Z-71 Tahoe. My speedometer is 2 - 3 mph off at 60 mph and 3 to 4 mph off at 75 mph. If it indicates me going 60 mph, I am really going 63 and if it indicates 75 mph, I am really going 79 mph. I own a radar gun and have tested my velocity with it, as well as driving with a GPS that indicates my speed continually.
You can either 'live with it' and always be mindful of your speed OR drive with your GPS running -- so as to reduce your chances of getting a ticket for speeding. I suppose you could drop a few large bills on getting it professionally recalibrated.
#3
Super Moderator
Or for 200$-250$ you can have it tuned for the correct speed and get better performance/mpg out of the truck. Whoever told you it can't be reprogrammed lied through their teeth
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