Q: I have a 1988 Chevy k1500 automatic. The other day it started having issues switching from first to second gear. I would have to g

asked by on December 18, 2017

I have a 1988 Chevy k1500 automatic. The other day it started having issues switching from first to second gear. I would have to get it to about 4k rpm for it to go to second. The rest of the gears we're fine. Then the next day I was going to work and it wouldn't even shift up out of first gear. Now all I have is first and reverse. The only other thing that is possibly related is prior to this happening, I would lose power sometimes in reverse and otherwise the truck idles really low. Other than that I checked the codes and came up with codes 33 sensor circuit error (signal high indicating low vacuum),45Oxygen sensor error (rich condition indicated), and 69A/C clutch relay circuit error (open circuit indicated)A/C high pressure switch error.

My car has 129000 miles.
My car has an automatic transmission.

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