: Generator Replacement Procedure (Northstar)



Ranger
07-19-09, 10:44 AM
Courtesy of MarkC


Removal Procedure


Disconnect the negative battery cable.
Remove the accessory drive belt. Refer to Drive Belt Replacement .
Remove the upper front bolt.
Raise and suitably support the vehicle.
Remove the front engine splash shield.
Remove the radiator support access panel.



Loosen the rear generator bracket from the engine.
Remove the top bolt.
Remove the front lower mounting bolt.
Remove the lower rear mounting bolt.
Remove the upper rear mounting bolt.
Remove the duct from the back of the generator.
Disconnect the following electrical connections:
Regulator
Battery output
Heated windshield (if equipped).
Remove the front generator/ A/C bracket.
Rotate the generator and remove.
Installation Procedure




Install the generator.
Install the front generator/ A/C bracket.


Connect the following electrical connections:
Regulator
Battery output Tighten
Tighten the battery output cable to 20 Nm (15 lb ft).

Heated windshield (if equipped).
Install the duct to the back of the generator. Align the duct to the generator black duct.
Install the upper rear mounting bolt. Tighten
Tighten the upper rear mounting bolt to 47 Nm (35 lb ft).

Install the lower rear mounting bolt. Tighten
Tighten the lower rear mounting bolt to 47 Nm (35 lb ft).

Install the front mounting bolt. Tighten
Tighten the front mounting bolt to 47 Nm (35 lb ft).

Install the rear generator bracket bolt to the engine. Tighten
Tighten the bracket mounting bolt to 47 Nm (35 lb ft).

Install the upper front bolt.
Install the radiator support access panel.
Install the front engine splash shield.
Lower the vehicle.
Tighten the upper front bolt. Tighten
Tighten the upper front bolt to 47 Nm (35 lb ft).

Install the accessory drive belt. Refer to Drive Belt Replacement .
Connect the negative battery cable. Tighten
Tighten the negative battery cable bolt to 15 Nm (11 lb ft).

dkozloski
07-19-09, 04:34 PM
There is no such thing as a NorthStar with a generator; you must mean alternator.

Ranger
07-19-09, 09:12 PM
You need to read the FSM. It is referred to as a "Generator" and has been for several years as I recall. Not sure why GM has gone back to that terminology, but they have. Perhaps because it generates electricity?

ewill3rd
07-19-09, 09:18 PM
Yeah I hate to say it but the manuals have gone back to callng it a generator.
I think it may have to do with control or something or maybe they just prefer the terminology.

I don't split hairs, I just call it whatever hits me when I am talking about one.
Technically there is a difference I guess but who knows?

dkozloski
07-19-09, 09:32 PM
Actually a generator and an alternator both generate alternating current. The generator rectifies it to DC with a commutator and an alternator uses solid state diodes for the same job. I stand corrected. GM marches to a different drummer.

mtflight
08-24-12, 02:28 PM
As far as this replacement, I just did it last Sunday on my 99 ETC. One must remove the passenger side radiator cooling fan. One of the two bolts on the back of the generator is blocked by the exhaust manifold. This means that in order to remove it, I had to loosen the bolts that hold the dogbone support to the engine Then the generator falls out.

There's a little metal plate with 4 bolts holding it in place, right under the generator. It is necessary to remove it or it will not fit through. ratcheting wrenches would come in handy. 15mm. There's no room for a socket unfortunately which makes the job a true P.I.T.A.

wlewis
08-28-12, 05:15 PM
I recently did this job on my 99 Eldorado (non ETC) and did not remove the fan. After having the generator free I loosened the bracket to give me a little more wiggle room, but did not remove it completely. I rotated the generator so the the pulley faced the ground and was able to get it out (through the bottom). The wrench I used the most was a 15mm ratcheting w/ swivel end. Also I found that a ratchet with a flexible handle and an assortment of extensions came in handy.