Codes

1993 CHEVROLET SILVERADO
14,500 MILES • 5.7L • V8 • 4WD • AUTOMATIC
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SEAN SILBERHOLZ
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Hi, on my K1500 it is on one one system. I pulled two codes 28 and 32. I looked up both codes one was for transmission other was for EGR. Where should I start? Thanks. Also, if you know what I should do to test or anything like that I would appreciate it.
Oct 5, 2017 at 4:25 PM
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STRAILER
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I would start by testing the EGR valve to see if it is working. Here is a video of the job being done.

https://youtu.be/DqUCbbKdWf4

If is tests okay I would clear the codes and try again. How it is running?

Please let us know what you find.

Cheers, Ken
Oct 6, 2017 at 4:20 PM
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SEAN SILBERHOLZ
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Ok. So I cleared the codes and they came back. I don't have a tester for the EGR. I might replace it and clear the codes again. What should I do for the 28 code I know that is the Auto Transmission Range Pressure switch error. What does the pressure switch look like and how do I change it. Here is a picture of what I have seen. Here is another switch in the 4 picture. Thanks.
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Oct 10, 2017 at 9:28 PM
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STRAILER
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Code 28 Is an injector driver error

https://www.2carpros.com/articles/buick-cadillac-chevy-gmc-oldsmobile-pontiac-gm-1983-1995-obd1-code-definitions-and-retrieval-method

You may have a bad computer? I would try a used one there are plug and play so that's easy.

Please let us know what happens.

Cheers, Ken
Oct 11, 2017 at 10:21 AM