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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

11/24/2020 in the HD/Fleet Forum
HELLO Got this truck here came in no engine brake operation and will start with out pressing clutch pedal down so i replaced clutch switch now you have to press clutch for starter to crank but still have no engine brake using dddl8 no codes in data i see ...
Intermittent loss of oil pressure - LB7
11/24/2020 in the HD/Fleet Forum
[Engine: 06 GMC Sierra 2500 HD SLE 6.6L] I have a truck from the state department. It has 300K miles on it, and it is not slated for replacement yet. On 2 occasions they have brought it in with a complaint of NO oil pressure. I have driven the truck on 2...
Freightliner m2 no city horn
11/17/2020 in the HD/Fleet Forum
we have a 2008 m2 that the city horn does not work I took off the plastic off the colum and got to the wires i grounded the with a jumper wire it did work a few times then stopped. it goes though the body control to run the horn why would it work then sto...
19 int mv trans light reset
11/17/2020 in the HD/Fleet Forum
I asked here before about resetting the oil change light on this truck. It just passed 50k and a message to change trans oil filter came on. We changed the filter and fluid but how do you reste the service light. The oil procedure does not work for this. ...
Mercedes Codes P1593-00 / P16B4-00
11/16/2020 in the HD/Fleet Forum
[Driveability: 15 Mercedes-Benz Sprinter 2500 3.0L] Hello Group Reference: Mercedes Sprinter 2500 Looking for Diagnostic Information for Fault Codes P1593-00 & P16B4-00 Thanks in Advance for your HELP.

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