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LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Trouble Code DTC-28 help!

   
Old Feb 24, 2011 | 09:47 PM
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Default Trouble Code DTC-28 help!
Performed a bypass with a paperclip on my '93 z28 as recommended..Getting a trouble code 28. (auto transmission range pressure switch error). Can anyone tell me what this means and bout how much am I looking at in getting this fixed?
Thanx,
Sure appreciate the help...
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Old Feb 24, 2011 | 10:10 PM
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On a 1993, DTC 28 means:

Quad-Driver Module (QDM) #3 circuit
applies to:
- fan control relays
- a/c relay

Check those relays and/or circuits.
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Old Feb 25, 2011 | 05:27 PM
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thanx for the heads up! shbox

Quad-Driver Module (QDM) #3 circuit
applies to:
- fan control relays
- a/c relay....

-Does this have any relationship to the bogging/sluggish and shutdown of vehicle??
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Old Feb 25, 2011 | 06:44 PM
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Originally Posted by r0llz1104
thanx for the heads up! shbox

Quad-Driver Module (QDM) #3 circuit
applies to:
- fan control relays
- a/c relay....

-Does this have any relationship to the bogging/sluggish and shutdown of vehicle??
It's just for those relays/circuits. It should not impact anything else.
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Old Feb 26, 2011 | 12:46 PM
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hey thanx for the heads up, shbox...appreciate it
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