Wow, how old a vehicle is this? The generators have been gone from most GM products since the early 1960s. I converted my 1961 Chevrolet from the old generator to an alternator, but this was in the days before the regualtors were built-in. The biggest three problems for me then were: Getting a top bracket for the alternator, since the alternator was different from the generator it replaced Making sure the external regulator was integrated into the ignition system for the initial voltage to operate properly (and making sure the dash ligh worked) and
one minor operational problem, the alternator would not charge properly at first crankup each start. I had to get the engine RPM up above an idle to get the regulator to start working, and getting the alternator on line to charge. Quite simple, now, actually, since the newer alternators have internal voltage regulators. The mechanical part of mounting the new alternator might be a bit of a problem, but I'd submit a friendly GMC parts guy might be able to look at some old parts catalogs and determine the different mounts GMC used in the first few years of alternators in that engine series.
Install a good generator or alternator.
the starter,battery and the alternator are good,icheck and change the the wires but the light inside the dashboard,the headlights come on but the truck will not start.
facing the fron of truck look on left side below battery . alternator is down there it can be changed from on top or underneath
how do you install alternator on 2000 Ford diesel truck
Loosen the belt and unbolt the alternator.
86.5 from 720 to d21 hardbody.
How do you install an alternator belt on a 1986 GMC s15 pickup truck
Remove the belt from your 2001 Chevy S 10 pickup truck alternator. Remove the wiring harness from the back of the alternator. Remove the alternator retaining bolts. Reverse the process to install your new alternator.
remove the bad one buy a new one install in reverse order of removal
need diagram for 1986 Nissan truck alternator
I unhooked wires on alternator but did not mark wires
Start the truck then disconnect the battery if it's still running the alternator is good