why does my trans. not shift up out of 1st with engine rpms increase

Asked by Denny May 06, 2014 at 11:48 PM about the 1994 GMC Sierra 1500 K1500 SLT 4WD Extended Cab LB

Question type: Maintenance & Repair

when you floor it and let off it stats in 1st gear if your stopped on a incline it acts like it slips

1 Answer
35

kdean1 answered 10 years ago

Check for vacuum leaks or dirty fluid, if necessary after checking Vac change the fluid.

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