2007 chevy express 3500 wont go over 50 mph what may cause this

Asked by Mar 16, 2018 at 03:18 AM about the 2007 Chevrolet Express

Question type: Maintenance & Repair

i have a 2007 chevy express 3500 duramax 59,000 miles box truck, when i
drive on the high way it wont go past 50 mph what may cause this problem and
when you scan it a lot of codes come up...need advice bc this is my first diesl
truck

1 Answer

1,320

Ok your in luck because I'm a diesel mechanic. Do you know codes? Majority of times the transmission get a signal from the engine by an output speed sensor. This sensor will cause trans to be limited, stays in one gear, activate check engine light.

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