burbanonasantis Posted April 7, 2007 Report Share Posted April 7, 2007 thanks again... but what does ac, + natural plug mean? and how do you know its the right pin? the discription reads 07 suburban Speed Sense yellow/black ac ECM, black 73 pin plug, pin 57 The ECM (Engine Control Module) is on the driver side fender, behind the headlight. Reverse Light dk. blue + BCM, natural plug, pin 22 The BCM (Body Control Module) is to the left of the steering column. Quote Link to post Share on other sites
cntrylvr79 Posted April 7, 2007 Report Share Posted April 7, 2007 http://avic411.com/forum/viewtopic.php?t=2609 Quote Link to post Share on other sites
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