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I have a 2000 Chevy K2500 4x4 6.5 TD with 197k miles and when I start it up after it sits for a day or more, the speedometer jumps up to about 20 mph, up and down for a few seconds. Then it behaves normally. Is this something to be concerned about? It works well (GPS verified) when driving. This...

I bought a turbo boost bolt from pmdcable.com but I don't know what kind of gauge to get. One that goes from zero to 35 psi or 30 In Hg/20PSI or 2.5 kg/cm2 or...? totally confused. Can someone look at this page and tell me the right type of measurement to get...

I guess this code has something to do with a/the thermostat. I get the code about a week after clearing it. The dashboard thermostat looks fine, i.e. it moves a bit off the left side under appropriate loads. What's the best way to diagnose and repair so this code goes away? Or should I just do...

Truck is a 2000 K2500. I am on a road trip and concerned about charging. On Wednesday morning, it was 15 degrees and the engine took four separate crank attempts to finally fire up so I'm sure the truck batteries were quite low. Having to charge four batteries (two in the truck, two in a camper...

In June of this year, I had an AC compressor lock up on me. I got it replaced while on a trip. Then about a month ago, the new one died on me, again on a trip, I got it replaced under warranty from Kragen. But I'm not sure if it should run like this, with the frequent stops and starts...

I've spent a couple hours on the forums here, learning about PMDs and I think that's my problem. I'm not mechanically inclined, but I am good with tools (carpentry mostly) and generally fearless. I've taken the truck into a diesel mechanic (Parkrose Truck and Auto in Portland Oregon) and they...