|
2004 gmc 2500 HD issues.
Driving the truck loaded with camper and gear today. The truck started to make an interesting noise but only when coasting downhill allowing the motor and drivetrain to slow the rig down a bit. Travelling through the mountains and some of these downhills can be several miles in length.
After coasting for a while a noise that sounds like a Zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz kind of thing. Fairly loud.
Turn off radio. Not that
Shift trans to N. Still noisy. Rev the engine to 2500 rpm while in N. sound goes away.
I remember that this happened once about 3 or 4 years ago and had never done it again until today. Only 96000 km on truck. 6 litre gas 4x4
Any ideas?
|