Besides the obvious...what is the difference between the two...my truck has the 105...what would i have to do to put the 145 on...i'm told the do not interchange..is this correct?

I upgraded to a 135 AC Delco reman upgrade, and have had no problems. It is a 105 body hyped up a little.

How expensive was it?..i got the 105 for 139 from napa

It was 140( I Think)after the core charge was refunded. I think the brand of the store is Auto Value. They are set up a lot like NAPA. Matter of fact, they trade parts with the NAPA up the street from them.

I'm pretty sure a 145 will bolt right where a 105 sat; the bolts may be different. I'm almost positave its a different belt, too.

The belt shouldnt make any difference at all. Thats what a belt tensioner is for. It'll automatically take out the slack.

The belt shouldnt make any difference at all. Thats what a belt tensioner is for. It'll automatically take out the slack.

I would've thought so too, but gm-auto-parts shows a 97300653 belt for the 105A and a 97300656 for the 130A and 145A alts...

Belt P/N reference and lengths...

Slightly larger pulley on the 145 i believe...

It swapped right over on my truck, used the old belt too. The housing is noticably larger, but it looks to have the same pulley placement(distance from mounting holes to pulley).

It swapped right over on my truck, used the old belt too. The housing is noticably larger, but it looks to have the same pulley placement(distance from mounting holes to pulley).

Shouldn't have a problem; it's factory w/the VYU snow plow prep...

I'm willing to upgrade to a 140 or 200Amp on my 6.5. Anything special I must care about? No trouble for ECM or something else?
I bet I can just bolt on the new one, but that looks too simple...:think:

I'm willing to upgrade to a 140 or 200Amp on my 6.5. Anything special I must care about? No trouble for ECM or something else?
I bet I can just bolt on the new one, but that looks too simple...:think:

On the 6.5 (and maybe on the Duramax, I don't know) if the pulley is not the right size, your tach will be off.

My old 6.5 had a gasser alternator and the tach was always high. It read about 2500 when my scantool read 2200. Didn't worry me too much but I'd be concerned if it was the other direction.

I have a big one... :D No sunroof or climate control though.:(

VYU snow plow prep on my truck.

Any major benefit from the upgrade???

Don't know really. People I'm talking about say the stronger Amp you get, the better it is, but don't know precisely why.

I would check with pitstop motosports who is a vender on this site.

Any major benefit from the upgrade???
If your running a plow, lots of lights, or a winch you dont drain your batteries.

You should change the belt to the size made for the 145 amp alternator. The 105 belt is short and you will put too much pressure on your bearings, all of them. The a/c, tensioner, idlers and power steering. Been there and done that. The 97300655 works on dual 145 alts, but belt was super tight and alternator(clutched) was making noises. The 97300657 was only 23mm longer but it stopped the alternator bearing noise that was very noticeable. Point being, get the belt made for the application.

Updated to the 145 on the 01, Get the bigger belt. For somw reason the 06 came with a 145 and no snowplow prep, dually a know. Plows great though ):h

You should change the belt to the size made for the 145 amp alternator. The 105 belt is short and you will put too much pressure on your bearings, all of them. The a/c, tensioner, idlers and power steering. Been there and done that. The 97300655 works on dual 145 alts, but belt was super tight and alternator(clutched) was making noises. The 97300657 was only 23mm longer but it stopped the alternator bearing noise that was very noticeable. Point being, get the belt made for the application.

Thanks for posting the part numbers hotrent1. I just bought a new 145 amp alternator and was searching this site for more details... Saved me from starting a new thread! I am upgrading to a 145 amp from a 105 amp.

Now I'm wondering if I can just run both? :think: I bought the individual components to run duals, but not of different amperages.

Thanks for posting the part numbers hotrent1. I just bought a new 145 amp alternator and was searching this site for more details... Saved me from starting a new thread! I am upgrading to a 145 amp from a 105 amp.

Now I'm wondering if I can just run both? :think: I bought the individual components to run duals, but not of different amperages.

you can send me the 145 and I will send you a brand new 105 and that way we will both have a match.:D to run the duals.

My local AC Delco store has only a 130 amp and they want $232 for it. My local Napa store also only has a 130 amp and they want about $200. The only place that I found a 145 amp alternator was from Pacific Performance Engineering. They offer the 145 amp with there dual alternator kit and will sell just the alternator for $355. I asked them who makes the 145 and he said AC Delco but it was a secret where you could get it.

I would really like to upgrade to the 145 but not at that price. I would go with the 130 if I could find it for about $150.

I believe the dual 105's generate more amps at idle, and they might run cooler than the single 145 under high load. Lower temperature should extend life.

I have 1 question: Do you need a different fusable link if switching from the 105 to the 145?