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Which Harmonic Balancer?

I've developed a vibration in the steering wheel of my 1994 GMC C1500 4.3L V6 LB4 that I have determined to be the harmonic balancer. When I start it in the morning and the engine is cold there is no vibration at all. But when I get it up to operating temperature there is a fairly strong...
- thx1138v2
- Thread
- Dec 11, 2022
- Replies: 15
- Forum: Engine Performance + Maintenance
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94 GMC 4.6L vibration

I'm starting to feel a vibration in the steering wheel. It has 250K miles on it. The vibration is slow at idle in the driveway and speeds up as I pull out and drive it. I drove it @ 80MPH for 2 hours today and of course the vibration was gone at speed but it came back at idle. I'm thinking...
- thx1138v2
- Thread
- Jun 24, 2022
- Replies: 14
- Forum: Engine Performance + Maintenance
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Odd experience this afternoon in my 94 GMC 4.3L standard cab

FYI Coming home from the grocery store I noticed the tach and the speedometer jumping wildly all over the dial. I pulled up in the driveway, let it idle for a bit, and then gunned the engine. Sitting still in the driveway the tach and the speedometer were still both jumping all over as I gunned...
- thx1138v2
- Thread
- Feb 15, 2022
- Replies: 2
- Forum: Engine Performance + Maintenance