Question about 2004 Chevrolet TrailBlazer
PCM , 04 trailblazer ..that depends on which engine you have .. if you have the 4.2 liter engine it is located on upper left side of engine , behind alternator , with 3 big connectors on it .. if you have the 5.3 liter engine it is located near lower left front of engine ..
Posted on Jan 21, 2009
Easyiest way to find info about any car you own is clymers books.helps to see if its something you really want to do yourself.
Posted on Jan 21, 2009
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Posted on Jan 02, 2017
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Jul 09, 2016 | Cars & Trucks
The Engine and Automatic Transmission (not applicable to manual transmissions) in this vehicles drive train are fully electronically controlled by a computer called the PCM and TCM (Power Train Control Module, Transmission Control Module). When a problem like this or other drive-ability related problems occurs the computer stores a record of the problem (there are of course some exceptions to this, like the fuel pump, engine coolant temperature sensor and MAF sensor for instance) in the form of a fault code in its memory, to read these fault codes you must have the systems memory scanned with a special tool. Once the fault code(s) are read you then must perform the appropriate diagnostic testing to find and resolve the problem(s) DO NOT REPLACE ANY PARTS UNTIL A TRAINED TECHNICAIN HAS DIAGNOSED THE PROBLEM TO AVOID SPENDING YOUR HARD EARNED MONEY ON PARTS THAT MAY NOT CORRECT THE PROBLEM. Also always check fuel pressure for correct spec for your make and engine type.
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