Loss of power

Asked by Apr 10, 2017 at 09:00 PM about the 2001 GMC Sierra 2500HD 2 Dr SLE 4WD Standard Cab LB HD

Question type: Maintenance & Repair

I have a 2001 GMC Sierra 2500 diesel it lost power
going down the highway and wouldn't go over 65
mph check engine light came on  but now it's
running normal I want to see what can I do to fix
the problem.

2 Answers

82,835

Have the CEL trouble codes read to know what is going on.

54,485

Sounds like it may have got some air into the fuel system. Check the fuel filter for leaks and moisture.

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