98 Chevy Silverado speedometer
Printed From: Unofficial Allis
Category: Other Topics
Forum Name: Shops, Barns, Varmints, and Trucks
Forum Description: anything you want to talk about except politics
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=207192
Printed Date: 21 Aug 2025 at 3:12pm
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Topic: 98 Chevy Silverado speedometer
Posted By: thendrix
Subject: 98 Chevy Silverado speedometer
Date Posted: 22 Jun 2025 at 10:59am
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My mama has a 98 Silverado and the speedometer is WAY off. Washing around the driveway it reads 90 to 100 and after stopping it sits on 100. Any thoughts? It's a 5.7 auto. I'm guessing either a 4L60E or maybe 4L80 transmission? ------------- "Farming is a business that makes a Las Vegas craps table look like a regular paycheck" Ronald Reagan |
Replies:
Posted By: ekjdm14
Date Posted: 22 Jun 2025 at 11:23am
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Does the gauge reset cycling the key off/on? Back to zero OK if it does? First thought would be bad electrolytic capacitor somewhere in the cluster, if the gearbox is behaving OK. The "capacitor plague" is usually cited as >99-07 but my experience says surface mount electrolytics from about '93 to about 2000 were actually the worst. Otherwise, I've heard Chevys suffer with stepper motor failure in the clusters but not sure which years/models were affected. No direct experience since they're kinda rare in the UK lol ------------- Stuck Farmer |
Posted By: thendrix
Date Posted: 22 Jun 2025 at 1:16pm
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If I remember right the needle was on zero when I got in the truck but I don't remember paying attention. I would like to think if it wasn't on zero I would have noticed I hope ------------- "Farming is a business that makes a Las Vegas craps table look like a regular paycheck" Ronald Reagan |
Posted By: iowallis
Date Posted: 22 Jun 2025 at 8:58pm
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My daughter had a 2000 Chevy Cavalier that the gauges started to fail. Speedo would read 110 when doing 30, pegged the needle doing 55. Gas gauge all over the place as far as fuel level. Found out GM products from this era use poor quality “stepper motors” for the gauges that were known to fail after about 15-20 years. Found a business on eBay that repairs them . Sent the gauge cluster to them and within a week I had it back, reinstalled it and no issues after that. Think it cost me about $75.00. I am taking a guess that your gauge stepper motor is failing. |
Posted By: Codger
Date Posted: 23 Jun 2025 at 6:38am
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Yazaki North America vendored to the OEM's for many years and probably still do. They would have made the instrument clusters for most any GM product in the last 40 years or so: https://www.yazaki-na.com/" rel="nofollow - https://www.yazaki-na.com/ They had a warehouse in Bloomington, IL and I used to pick up both new, and rebuilt clusters for OEM dealerships all over the midwest. Many times it's not the design engineering that is at fault or failure. It is the cost, and marketing constraints placed upon the design(s) that cause failure. ------------- That's All Folks! |
Posted By: thendrix
Date Posted: 23 Jun 2025 at 8:35am
This sounds familiar. Dad drove it this way for a little while before he passed and I think mama figures, no more than she drives it, it's not a big deal. She's probably right but it would bug me to no end ------------- "Farming is a business that makes a Las Vegas craps table look like a regular paycheck" Ronald Reagan |
iowallis wrote:Posted By: Ray54
Date Posted: 23 Jun 2025 at 12:05pm
| I have a 89 Ford with early 7.3 with C6 behind it yet. The gauges on it are wacky but moving. Is there am hope for it? The guys I have talked to believe a different gauge cluster is the only hope. But if it could be sent somewhere. |
Posted By: Codger
Date Posted: 23 Jun 2025 at 1:00pm
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Pull the cluster from the vehicle and using a "Red Ruby" pencil erasure, scrub any electrical connections you can access. Use a good quality electrical contact cleaner such as "GC Electronics" brand and liberally apply the product to any other connection male and female you can access. After that use 70% isopropyl alcohol and a stiff "polyester, or china bristle" brush to scrub everything down and clean. Isopropyl leaves no residue once dry. One thing with any electical contact cleaner is to not directly, or purposely spray plastic parts. Plastic parts melt, or soften easily if they are saturated. ------------- That's All Folks! |
Posted By: thendrix
Date Posted: 23 Jun 2025 at 1:50pm
I had an 86 with a 6.9 and C6. It's by far my favorite Ford body but the 6.9 with the VRV issues just spoiled me on it. If I could find a 460 with a 5 speed in good shape I'd but it. ------------- "Farming is a business that makes a Las Vegas craps table look like a regular paycheck" Ronald Reagan |