Which alternator for 2013 Yukon Denali XL? ACDelco 145 Amp?

[dictum]

I can't figure out what Amps my old one had. It's not charging. At idle, it barely makes it to 13V. My other Denali at idles generates almost 15V so I know something is wrong. The vehicle has 180K miles. I get all the classic signs of a failed alternator.

I am looking at this ACDelco on Amazon prime. 145 Amps. Does this make sense or should I get another brand or something with more Amps?

https://www.amazon.com/ACDelco-20881337-Original-Equipment-Alternator/dp/B0049Z6WQ8/ref=cm_cr_arp_d_product_top?ie=UTF8

 

[Doubeleive]

I can't figure out what Amps my old one had. It's not charging. At idle, it barely makes it to 13V. My other Denali at idles generates almost 15V so I know something is wrong. The vehicle has 180K miles. I get all the classic signs of a failed alternator.

I am looking at this ACDelco on Amazon prime. 145 Amps. Does this make sense or should I get another brand or something with more Amps?

https://www.amazon.com/ACDelco-20881337-Original-Equipment-Alternator/dp/B0049Z6WQ8/ref=cm_cr_arp_d_product_top?ie=UTF8

Denali I believe should have the 160amp but I could be wrong, 145 is probably fine unless you have a bunch of extra electrical stuff hooked up

 

[wjburken]

I have the DR44 alternator in my 2013 Yukon Denali which is a 160A unit.

 

[Fless]

Post up a pic of your RPO sticker from the glovebox, or list the Kxx codes that are on it.

 

[Scott in AZ]

I’m piggy-backing on this helpful thread because the alternator in my 2001 Yukon is original. Working fine now but 22 years USA long time. My K__ RPO codes are below, KC5, KG8, KNP, K34, K47. Can I upsize my alternator? What is the best alternator to use?

My next project is remove dash cap and replace ambient light sensor, but next-next project is alternator, coils, wires and spark plugs.

 

[Fless]

Here are some of the generator codes and their associated amp ratings:



I'm not sure about upsizing and compatibility. Worst case you'd need to compare connectors and how everything is clocked.

 

[gooffeyguy]

I have the DR44 alternator in my 2013 Yukon Denali which is a 160A unit.

Mine's the same

 

[wjburken]

Here are some of the generator codes and their associated amp ratings:

View attachment 404011

I'm not sure about upsizing and compatibility. Worst case you'd need to compare connectors and how everything is clocked.

KW1 is the RPO code for the 160A alternator. My 2013 has this code

 

[Fless]

And you guys with the newer rigs will have the RVC system.

 

[mikez71]

And you guys with the newer rigs will have the RVC system.

^^^x2^^^

That could be the reason you show 13V on one and 15V on another vehicle. Might be battery condition. Could test by swapping batteries.

As far as upgrading alternators, newer 220A units from the 5.3 and 6.2 trucks will fit, @iamdub has some part numbers in his build thread i believe..