Check the listing for details. GM Engine Computer ECM PCM ECM Plug Guides Red, Blue, Green, Black, Clear. Condition: Pre-owned. Listed at 11.95 USD. This listing is for one pair of used GM color coded engine computer plug guides. These are used take off parts that are in very good condition. When you make your selection of color for one order you will receive 2 of the same color as one set. These are sold as a color set. Blue Set (one order equals 2 pcs) Red Set (one order equals 2 pcs) Green Set (one order equals 2 pcs) Clear Set (one order equals 2 pcs) Black Set (one order equals 2 pcs) The following is a color code chart for the OEM engine computer Service Numbers (SERV NO.) You will need to look at the tag of your computer for verification of what SERV NO you your computer is.***************************************************************************Blue and Red PCM Connector GuidesFits SERV NO's: 9354896, 09354896, 12200411, 16238212, 16232148, and others Blue and Green PCM Connector GuidesFits SERV NO's: 12576106, 12581565, 12586242, 12586243, 12589462, 12589463, 12602801, 12602802, and others Blue and Clear PCM Connector GuidesFits SERV NO's: 09361733, 9361733, 09361735, 9361735, 9378702, 09378702, 9388505, 09388505, and others12209614, 12209624, 12210729, 16217058, 12583827, 16214848, 16217058, 16227797,16231853,16236757 Blue and Black PCM Connector GuidesFits SERV NO's: 9356249, 09356249, 12202203, 16228016, and others*************************************************************************** *Free shipping with US Postal Priority Mail anywhere in the USA.*We ship the same day or the following business day from receipt of payment - item is in stock *Picture is of a color guides in stock. The parts you will receive of are of like quality and finish as that shown guaranteed.