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Gm Tech (Cam)
Gm Tech (Cam), GMC Mechanic
Category: GMC
Satisfied Customers: 1685
Experience:  GM Grand Master Technician 2007. 14 year experience.
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2001 6.6liter dura max diesel, 2500 HD. At open road cruise,

Customer Question

2001 6.6liter dura max diesel, 2500 HD. At open road cruise, the power drops to 2000 rpm, then to 1500 rpms and then to 1000 rpms. The engine does not stall but stays idlling, after shutting down with the key it will restart instantly at full power and will operate intermittinly on and off with no set pattern, except when grade changes happen. Thank you Richard Kreager.Please help
Submitted: 1 year ago.
Category: GMC
Expert:  Juan Crespo replied 1 year ago.

Hi Richard,

Any modifications installed, i.e. hi-perf air filter, tuner, etc.?

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