Speedometer help. 90-91 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

jbristo67 · 02-17-2015, 10:28 PM

My odometer quit counting on my 91 blazer. I got one from a junk yard but the odometer is at over 200k. My blazer has 86k. Anyone know how to roll it back to match

cfan10 · 02-18-2015, 02:06 AM

Youtube has bids on rolling back. I can't seem to find a 90 speedometer.

Ski-me · 02-18-2015, 06:51 PM

I found a local speedo shop and he dialed in my 90-91 odometer to match my 89's number. After a quick review of CarFax I was able to determine how many times my speedo rolled over the 100k mark.

You might be able to take the tumbler out of your old one and drop it into the new one. I've played around with them (89 and older and if I recall, pretty easy). I couldn't find a socket small enough to get to one bolt, but ended up grinding the edges off of the socket and got the bolt removed.

94' MC 205 LT1 here.....

jbristo67 · 02-18-2015, 10:29 PM

I figured it out. It was pretty easy. Just tedius

02-17-2015, 10:28 PM	#1
jbristo67 resident oilfield trash Join Date: Jan 2009 Location: Lubbock TX Posts: 1,465	Speedometer help. 90-91 My odometer quit counting on my 91 blazer. I got one from a junk yard but the odometer is at over 200k. My blazer has 86k. Anyone know how to roll it back to match __________________ 1967 SWB C10 396/400 factory air factory tach (sadly had to send to a new home) 1986 Honda 70 Fourtrax 1991 Chevrolet K5 blazer 2wd 1982 Mastercraft Pro Star 190 Stars and Stripes 2002 Chevrolet Tahoe 2011 Nissan Armada

02-18-2015, 02:06 AM	#2
cfan10 Registered User Join Date: May 2011 Location: Texas Posts: 984	Re: Speedometer help. 90-91 Youtube has bids on rolling back. I can't seem to find a 90 speedometer. __________________ Rest In Peace:Mikhail {Mickey Rooney} Alpha 2/5/13 Omega 7/22/14 10:28AM I love you tremendously and outragiously Superpuppi Thai Ridgeback...The most intelligent dog known to me. Don't mess with my truck, my momma or my money...not necessarily in that order. © Stand for something or fall for anything. [LIST][*]'98 Bourbon St. Brawl ©2010

02-18-2015, 06:51 PM	#3
Ski-me Registered User Join Date: May 2012 Location: Colo Springs, CO Posts: 870	Re: Speedometer help. 90-91 I found a local speedo shop and he dialed in my 90-91 odometer to match my 89's number. After a quick review of CarFax I was able to determine how many times my speedo rolled over the 100k mark. You might be able to take the tumbler out of your old one and drop it into the new one. I've played around with them (89 and older and if I recall, pretty easy). I couldn't find a socket small enough to get to one bolt, but ended up grinding the edges off of the socket and got the bolt removed. 94' MC 205 LT1 here..... __________________ - Jeff 89' K5 Blazer, 2.5" lift, 35" tires 04' GMC Yukon XL, 3/4 ton, 8.1L

02-18-2015, 10:29 PM	#4
jbristo67 resident oilfield trash Join Date: Jan 2009 Location: Lubbock TX Posts: 1,465	Re: Speedometer help. 90-91 I figured it out. It was pretty easy. Just tedius __________________ 1967 SWB C10 396/400 factory air factory tach (sadly had to send to a new home) 1986 Honda 70 Fourtrax 1991 Chevrolet K5 blazer 2wd 1982 Mastercraft Pro Star 190 Stars and Stripes 2002 Chevrolet Tahoe 2011 Nissan Armada



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