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Automotive HD/Fleet Forum

Professional automotive forum for discussion of heavy-duty trucks, buses and other on- and off-road equipment, and maintenance of automotive fleet vehicles. Discussion topics include fuels and lubricants, hydraulics, performance, on-board diagnostics, powertrain, power distribution, anti-lock braking and stability control systems, and best practices as they relate to heavy duty and fleet maintenance. This forum is for experienced automotive repair professionals only, membership required.

Continue to the description of our next automotive discussion forum, the HVAC Forum.

Recent Automotive Discussions in the Automotive HD/Fleet Forum

looking for a wiring diagram
04/25/2025 in the HD/Fleet Forum
2005 beaver motorhome. vin,[...]. c7 cat. currently looking for a chassis diagram for the oil pressure gauge. as the gauge does not work. new sender and gauge. the oil sender has 2 terminals, it is not using the cat 3 pin that is in the engine diagram. i ...
4DRBUAAN0BB287355
04/24/2025 in the HD/Fleet Forum
We have a 2011 IC Coach school bus with a DT466E that occasionally blows a quick cloud grayish-white cloud of smoke. It almost looks like an overfuel. This happens maybe once a week for about 30 seconds to a minute, but it's enough to block out the sun. I...
2013 chevy with durmax egr cooler tubing
04/22/2025 in the HD/Fleet Forum
2013 silverado crew cab 6.6 durmax need to replace the egr cooler metal tubing that goes from the right manifold to turbo to cooler. Question is pull trans or lift cab? Or anyone have another suggestion?
Remote programming kits
04/19/2025 in the HD/Fleet Forum
If anyone is interested? Ever need a module flashed on medium or heavy duty truck .
Crankcase filter
04/16/2025 in the HD/Fleet Forum
[Driveability: 18 International WorkStar 7600 12.4L] Group, We just had this truck in for a turbo actuator, it also had a code for crankcase pressure. After talking with cust, he says this truck seems to need a crankcase filter about every 15-20k miles I...

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