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ChevyTech · 04-19-2005, 12:29 PM

Your emissions label should have the correct procedure for setting the timing. I believe you should be disconnecting the “set timing connector”, and NOT jumping the ALDL to set the timing. On a 1995, I think the set timing connector is in the cab on the passenger side, and not under the hood like 1993 and older trucks. After you set the timing, you should clear the trouble code that is set by unplugging the set timing connector.

Code 54 is for low voltage / fuel pump relay circuit.

Here are some web sites
http://www.cfm-tech.com/gm_tbi_trouble_codes.htm

http://www.troublecodes.net/GM/

Hope this helps.
ChevyTech

04-19-2005, 12:29 PM	#3
ChevyTech Registered User Join Date: May 2004 Location: Minnesota Posts: 4,620	Your emissions label should have the correct procedure for setting the timing. I believe you should be disconnecting the “set timing connector”, and NOT jumping the ALDL to set the timing. On a 1995, I think the set timing connector is in the cab on the passenger side, and not under the hood like 1993 and older trucks. After you set the timing, you should clear the trouble code that is set by unplugging the set timing connector. Code 54 is for low voltage / fuel pump relay circuit. Here are some web sites http://www.cfm-tech.com/gm_tbi_trouble_codes.htm http://www.troublecodes.net/GM/ Hope this helps. ChevyTech