TBI Alternators

JPVortex · Jul 11, 2024

Hey y’all, my 94 k1500s alternator crapped the bed this week. Both bearings went bye bye.

I’m a little broke so I’m going to get a junkyard replacement.

Question is, will an alternator from any 88-95 with a 5.7 work?

I have the 100 amp alternator, and rock auto shows the same part numbers for most of the years except 88.

Thanks!

JDGMC · Jul 11, 2024

See pdf Hope this helps.

Erik the Awful · Jul 11, 2024

Make sure the pulley has the correct number of ribs! I just got my replacement alternator for WCJr, and even though the alternator was marked "w/ AC", it has the non-AC four-rib pulley on it.

1998_K1500_Sub · Jul 11, 2024

JPVortex said:
Hey y’all, my 94 k1500s alternator crapped the bed this week. Both bearings went bye bye.

I’m a little broke so I’m going to get a junkyard replacement.

Question is, will an alternator from any 88-95 with a 5.7 work?

I have the 100 amp alternator, and rock auto shows the same part numbers for most of the years except 88.

Thanks!

There was a larger (~140A?) alternator used in that period as well, you might see one of those at a junkyard. GM may have used different support brackets on that one, I.e., the extra support “rods” that mount from the ALT to other parts of the engine (exhaust manifold, etc), as compared to the 100A.

Just put another 100A back on and you’ll be fine.

1998_K1500_Sub · Jul 11, 2024

Erik the Awful said:
Make sure the pulley has the correct number of ribs! I just got my replacement alternator for WCJr, and even though the alternator was marked "w/ AC", it has the non-AC four-rib pulley on it.

^^^ good point

The pulleys can be swapped if necessary, but getting the correct one is a benefit / saves extra work.

sntrym · Jul 11, 2024

@JPVortex Sent you a PM

JPVortex · Jul 11, 2024

Thank you everyone! I will swap over my pulley if I can’t find anything other than a 4 groove.

But hopefully I can find a newer looking 100amp there!

TBI Alternators

JPVortex

I'm Awesome

JDGMC

I'm Awesome

Attachments

Erik the Awful

Supporting Member

1998_K1500_Sub

Nitro Junkie

1998_K1500_Sub

Nitro Junkie

sntrym

I'm Awesome

JPVortex

I'm Awesome

Similar threads

Latest posts

Staff online

Members online

Forum statistics

Share this page