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Thread: timing my 1999 yukon

  1. #1

    Default timing my 1999 yukon

    i bought a haynes manual so se the timing on my 1999 gmc yukon but i cant find any thing in the manual telling me how to do the complete set up and timimg on my yukon

  2. #2
    Join Date
    Jan 2007
    Posts
    4,835

    Default

    thunder195577 - The base ignition timing is preset - NO adjustment is possible. Timing advance and retard is accomplished through the Powertrain Control Module (PCM). If you're trying to remove and install the distributor use Chapter 5 and the appropriate Chapter 2 to help.

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