How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Gm Tech (Cam) Your Own Question
Gm Tech (Cam)
Gm Tech (Cam), GMC Mechanic
Category: GMC
Satisfied Customers: 1667
Experience:  GM Grand Master Technician 2007. 14 year experience.
10949255
Type Your GMC Question Here...
Gm Tech (Cam) is online now
A new question is answered every 9 seconds

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: 9 months ago.
Category: GMC
Expert:  Juan Crespo replied 9 months ago.

Hi Richard,

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