Question about 2002 GMC Sierra 2500HD

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Looking where to put a performance chip into my truck?

I was wondering how hard and what to do with the ecu.If I had to take the ecu right out board and all or if there was an easier way to do this..Thank you.

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  • yadayada
    yadayada May 11, 2010

    I do not understand the question, please be a bit clearer.



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You need to buy a programer like a hypertech. With a programer all you do is plug it in below the steering column at the computer port. You will need to pick the things you want the programer to do then it will program the computer. When it is done you unplug and stick it in your closet. It takes about 20 minutes and requires no tools or mechanical ability.

Posted on Dec 12, 2008


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Ecu diagrams

open up the ecu these ecu used a chip set. they can be removed. there is 2 chips clipped in one for engine control timing and other one for fuel ... the chip numbers are the parts you need. also look at the can's in the ecu there is a set that over time you will need to replace. these will cause problems but dont cost alot to get replacements. the cans failing will cause none starting/ backfiring high fuel running and engine to just cut out at any speed but more prone to cut out at high rev's. i would think it would be this parts you need and not the chips as the chips only go if the battery has not been put back on right with the ignition on.

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How do i replace ECU/ECM on 1996 toyota celica?

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What is ECU and how to make the ECU programmer? How exactly is that work

Electronic Control Unit, An engine control unit (ECU), most commonly called the powertrain control module (PCM), is a type of electronic control unit that controls a series of actuators on an internal combustion engine to ensure the optimum running. It does this by reading values from a multitude of sensors within the engine bay, interpreting the data using multidimensional performance maps (called Look-up tables), and adjusting the engine actuators accordingly.

Automotive ECU is to convert stored procedures chip in simple, replace the programmed chip, as long as open the backplane of the ECU and unplug the original chip and then put the new chip , as some older E-ROM chip only can write just one time, every time you modify the program you must turn the program of original chip into a blank chip and then replace the original chip. If you want to have a program modified by yourself, you need a ecu programmer.

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I have 2 Bmw's. The one 330i is manual and the other Automatic. My problem is the automatic 330i holds back on the power, really holds back on power. Sometimes it wants to perform and sometimes when you...

check for a wet ecu...
read below on the e36

the ecu compartment is under the windshield on the passenger side on E36

you gain acess to it under the hood....
this compartment gets wet, the ecu lays on a flat surface in that

the bottom side of the circuit board gets wet and starts corrosion.

remove the ecu, take the bottom plate off, clean the bottom of the circuit
board with alcohol and a soft tooth brush.

you should be able to see the signs of corrosion or conductive build up.

this gunk bridges solder points doing all sort s of wierd things to your
car, including false sensor readings from asc/abs controllers and other

all the way to engine failure and worst case burnt and shorted wiring

I'm on my 3rd ecu, took me and the repair boys a few years to figure this
one out.

BTW: i would get that ecu mounted above that flat surface, use some sort
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Performance improvement

Take a look under all of these for your favorite.
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