Location of a ecm in a 2003 chevy suburban - 2003 Chevrolet Suburban 1500

SOURCE: PCM module, ECM module 1996 Chevy Suburban K model

Powertrain Control Module = under right side of dash, near blower motor.
Engine Control Module = same as above
Vehicle Control Module = same as above

All Suburban vehicles are equipped with only one of these choices. Good luck.

SOURCE: Changing CO2 Sensor on 2003 Chevy Suburban

check the whole exaust sestyem? there should be 4to5

SOURCE: Where is the ECM located on an 89 chevy suburban?

Pretty sure its either behind the right kick panel or behind the glovebox if I remember correctly.

SOURCE: 2003 Chevy SuBurban The windshield wipers will not

It is actually a wiper control module that controls this. I have replaced many of them. It is the cover that is screwed to the wiper gear box. Remove both wiper arms. Remove the plastic cowl cover below the windshield that covers from side to side. Once inside you will see the wiper motor/transmission assy. Disconnect the electrical connector, and remove screws from cover, and replace it.

SOURCE: 2003 Chevy Suburban-replace alternator

Ok, Alternators are a breeze on these things. There are two bolts that hold it on, and 2 sets of wires. If you haven't taken anything apart yet, and the belt is still on it, here's what to do. You will want one of those rubber or elastic bungee cords, about 2 and a half feet long(this makes it easy). Hook that bungee cord to your hood somewhere, so that it hangs down. Hook the other end on the serpentine belt right next to the alternator pulley. If you need to prop the hood up with a stick or something to keep it up, do so. Pull up on the belt, and watch the pulleys. The one that probably has a plastic pulley on it that moves up and down(this is the tensioner) is the one that you'll put a deep well socket in the middle of with a ratchet, and turn counterclockwise. This will make the belt go loose. Now you can work the belt off the alternator pulley, and once you get it off, the bungee cord will keep it in place, so you don't have to look at the diagram. Otherwise, if it comes off, there is a sticker just under the hood either on the fan shroud or the radiator support that has the belt diagram. Now, you can disconnect the battery, pull the rubber boot down off the nut and post on the back of the alternator, remove the nut and wire, and then unhook the wire from the side of the alternator. Now, you can remove the two bolts that hold the alternator on. You Will need to pry the alternator off at this point, as it fits really tightly in place. A socket extension or a large flat screwdriver works really well for this. Once you get it off, put the new one on exactly as you took the old one off. Note, you will have to release your tension on the tensioner at some point; i just ease it down, or if I can pull it off, wedge it somewhere where it won't loosen very far. Remember, on the tensioner, you're not trying to take the nut off. All you're doing is using it to move the tensioner arm. That's all there is to this job. Sometimes it can be stubborn with the prying part, especially getting it into place. Hope this is what you're after, and if you need more info, leave a comment for me.

Testimonial: "Great advice on the bungee cord!! Well written advide and easy for a novice to follow. Thanks"