1994 GMC Suburban TCC Brake Switch

1994 GMC SUBURBAN
154,500 MILES • 5.7L • V8 • 4WD • AUTOMATIC
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TRND2SVU
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My truck has never given me any problems. Recently as I was out with my family the check engine light came on. I had it looked at and the code was #38 TCC brake switch stuck "off". I'm not exactly sure what it means or how it works or even how it would be fix . Can you please describe it to me. The truck was originally owned by my dad who recently passed from cancer he got from 9/11.

He was a very good mechanic and I'm trying to learn all I can to follow his footsteps. He's my idol and I'm going to be going to school for auto mechanical engineering and also am a volunteer fire fighter. Please help me save his baby. He bought it brand new in '94 and I'm keeping it. I want to restore it to original condition and paint a tribute to him on the tailgate. Hopefully this is a minor fix. Thanks for helping.
Oct 21, 2014 at 5:34 AM
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SATURNTECH9
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It could be a bad brake switch lets start by seeing if your brake lights work when you step on the brakes?
Oct 21, 2014 at 6:36 AM
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TRND2SVU
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Yes they do. Now if they come on all the time that I can not say. Also I want to add that the light has gone off for a little while and then back on. It is currently off again. I'm trying to narrow down exactly when it comes on.
Oct 21, 2014 at 11:44 PM
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TRND2SVU
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I still don't have an answer or understand this problem. The light comes on when I'm at highway speeds for a few minutes but when I'm doing local short trips around town it'll stay off. It doesn't matter if I drive it fast and heavy pedal or slow and light pedal type of driving. I'm hoping it's a simple fix!
Oct 24, 2014 at 2:57 PM