Search results

Assuming you have air brakes, Check the service air brake vavle switch at the rear axle. 2 wire harness going to the switch. Look for corroded wire or damaged pins. If the wires and pins are ok then unplug the switch, jump the two pins and go for a ride. Had a customer with those same symptoms...

Hey, looking to see if anyone has access to a wiring diagram for a 07 GMC t7500. Having a hard time getting info on this truck. At s point where a diagram would move things along quicker. Thanks.

Also the actuator that controls the temperature blend door could be jammed or dead, turn the key on, fan to level 1, turn the temp from cold to hot and carefully try to listen if you can hear the motor moving or clicking if jammed up

Any engine lights on? Is you rpm limited? Whistling could be charge air cooler leak or exhaust brake getting stuck if I were to guess with no codes.

Your differential pressure sensor consist of 2 steel tubes one before and after the dpf filter, the tubes are connected to rubber hoses which leads to the sensor. It's possible that the tubes are plugged or restricted, that can make the sensor think the filter is full. You can remove the tubes...

Hey there, sounds like there is an active fualt causing the truck to go into a derate. Needs to be hooked up to Hino DX and pull a code. Most likely a dpf clogging flag was activated. With Hino DX you can buy yourself some time by resetting the flags and clearing codes. The derate will come back...

Sounds like it needs to be plugged in to Allison doc, if you get a code I could help alot more. Certain codes will activate range inhibitor and lock the Gear the fault was set in. What sensors were changed and why? I'm assuming nothing internal

Anything can be used still, just be prepared to dish out some cash for repairs, buying at 375 give you plenty of room to spend on repairing it. 2006 should not have dpf, so you have that going for you. Worst case sonario you scrap it and get your 375 back

Follow the lines, eventually you should see the service ports. One port is larger then the other. The smaller of the 2 ports will be your low side line.