Automatic, wont shift down
10

Asked by outdoorutah Mar 21, 2016 at 12:37 AM about the 1995 GMC Sierra 1500 K1500 SLE 4WD Extended Cab LB

Question type: Maintenance & Repair

My 95 GMC Sierra will only start when I use
starting fluid.  Then the engine runs high, about
1200 rpm. Usually it's  about 900. It's automatic
and when I put it in gear it wants to take off. Then
when I am driving It won't shift,  so my RPM's are
way up but I'm only doing about 30. And
sometimes my breaks get  squishy.  It's done this
before a short time ago but only once and it gave a
reading that the TCU was bad.  I replaced it and it
w worked fine. This is just two months later and it's
not giving an engine code.

3 Answers
1,975

Jay answered 8 years ago

had a issue like that with my 1995 chevy tahoe except it always started and would idle at 1200-2000. put into gear and it kicks. while driving shift points would come late or wouldnt shift inless i left go of gas pedal a little. replaced TPS sensor problem solved.

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10

outdoorutah answered 8 years ago

Sorry, that's what I changed just a couple months ago, the TPS, not the TCU. I am going to change the TPS wiring harness first. If that doesn't fix it then the TPS. Hopefully that will do it.

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outdoorutah answered 8 years ago

Changed out the TPS and that fixed the problem. Thanks AutoTechJ

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