I have a 04 gmc sierra 1500 4x4 extended cab truck, 5.3 L engine. And it won't shift into 3rd / overdrive. Previous owner had it fixed but it's acting up again. No check engine light.. Ideas?

Asked by Oct 13, 2014 at 10:26 PM about the 2004 GMC Sierra 1500 4 Dr SLE 4WD Extended Cab SB

Question type: Maintenance & Repair

3 Answers

19,590

Is it low on transmission fluid? If not its probably a bad transmission. You could have it flushed but I would take it to a REPUTABLE mechanic.

Thanks I'll try that!

Y is my 04 GMC Sierra 4x4 saying reduced engine power and bearly go when just I put it to the floor?

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