2001 GMC Sierra 4x4 sputters and surges as soon as it hits 40 and will continue unril you pass 50 mph. If you keep into the trottle and higher rpm than idel its ok. Let off it starts again.

Asked by Jay Jan 03, 2015 at 11:20 AM about the 2001 GMC Sierra 1500 SL 4WD Extended Cab LB

Question type: Maintenance & Repair

Doesn't matter the load, grade, but if
you put cruise on it helps abit.

2 Answers
103,735

Reelin68 answered 9 years ago

Replace your Throttle position sensor. If no change, replace the EGR.

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Jay answered 9 years ago

Machanic saox it was intake manifold crack. He replaced it. No change. Taking it back tomorrow. I will definitely tell him to check these.

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