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Re: removal and install of alternator 1998 tahoe with 350
1st disconnect the battery! Use a tensioner pulley release tool to get the serp. belt off, then remove the wiring harness to the alternator, then pull the top short bolt out, then remove the long pivot bolt at the bottom of the alt.
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please dont ask me iam colour blind ,but to overcome this i use a multimeter or a little light and test for current this way ,going by the so called wiring colours is a disaster for me not only the colour thing but the wireing can change colours owing to different suppliers of looms in manufacture ,they run out of one colour and use another ?? you name it i think i have seen it
Hello KMC. Before you begin, I recommend a trip to the autoparts store to purchase a gadget called a memory saver which you plug into the cigarette lighter. These items are about $15.00 and they save all of your radio codes and other codes so everything will still work when you finish your installation of a new, rebuilt alternator. I am recommending a rebuilt unit, which is significantly less money provided that you turn in your old one once you have removed it.
Follow these steps to accomplish this removal:
Plug in your memory saver, if you have one.
Remove the vehicle's negative battery cable.
Remove the serpentine belt, or alternator belt. This is many times the most difficult part of the task.
Remove any necessary parts to reach the alternator.
Discard all belts or hoses removed in this process.
Disconnect all of the electrical connections (wires) from the alternator.
Disconnect and discard the alternator belt.
Remove any mounting bolts that hold the alternator in place.
Remove the alternator from the engine compartment.
you will have to remove upper intake plenum the black plastic part there is a o-ring around the area you are speaking of. now if this engine didn,t have the intake gaskets replaced before installing now would be good time because if you keep vehicle believe me you will have to do sooner or later these engines came with plastic intake gaskets that are notorious for leaking to do this you will njeed to remove both upper and lower intake manifolds I just started a job on 99 tahoe today before lunch and customer is driving tonight replaced upper and lower intake gaskets fel-pro makes updated gaskets for this engine that has thick metal shim and rubber gaskets a great improvement that ends this problem as for your vacuum leak at opening for fuel lines don,t see often but is possible hope this helps
There are three bolts: tensioner bolt on bottom two bolts on top and they are tough; three wires: ground, power, and harness.
Disconnect negative battery cable, remove all wires from alternator, remove drive belt. Locate all bolts: remove tensioner bolt and mounting bolts, then remove alternator from below. It comes off easier than it goes back on. Install is reverse order of removal. be sure to label wires for easier replacement.
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