Stereo & Electronics - Alternator

Alternator went out today. Was told to get the truck alternator. What year and what truck one should i get? Anyone have the part number for a AC Delco unit?

Just type "KG3 alternator" into fleabay.

This part will fit these makes and models with these options

AVALANCHE 1500 03-04 145 amp (opt KG3)
AVALANCHE 2500 03-04 145 amp (opt KG3)
CHEVROLET VAN 03-04 145 amp
ENVOY XL 03-05 5.3L
ENVOY XUV 04-05 5.3L
ESCALADE 03-04 (145 amp, opt KG3)
ESCALADE ESV 03-04 (145 amp, opt KG3)
ESCALADE EXT 03-04 145 amp (opt KG3)
GMC VAN 03-04 145 amp
HUMMER H2 03-05
ISUZU ASCENDER 03-05 5.3L
RAINIER 04-05 5.3L
SAAB 9-7X 05 8 cyl
SIERRA 1500 PICKUP 03 145 amp (opt KG3)
SIERRA 1500 PICKUP 04 w/o hybrid; 145 amp (opt KG3)
SIERRA 1500 PICKUP 05 w/o hybrid; 145 amp (opt KG3), w/SEO (opt 8C6)
SIERRA 2500 PICKUP 03-05 145 amp (opt KG3)
SIERRA 3500 PICKUP 03-05 145 amp (opt KG3)
SIERRA DENALI 03-05 145 amp (opt KG3)
SILVERADO 1500 PICKUP 03 145 amp (opt KG3)
SILVERADO 1500 PICKUP 04 w/o hybrid; 145 amp (opt KG3)
SILVERADO 1500 PICKUP 05 w/o hybrid; 145 amp (opt KG3), w/SEO (opt 8C6)
SILVERADO 2500 PICKUP 03-05 145 amp (opt KG3)
SILVERADO 3500 PICKUP 03-05 145 amp (opt KG3)
SSR 03-05
SUBURBAN 1500 03-04 (145 amp, opt KG3)
SUBURBAN 2500 03-04 (145 amp, opt KG3)
SUBURBAN 2500 05 (145 amp, opt KG3), ID 10464476
TAHOE 03-04 (145 amp, opt KG3)
TRAILBLAZER EXT 03-05 5.3L
YUKON 03-04 (145 amp, opt KG3)
YUKON XL 1500 03-04 (145 amp, opt KG3)
YUKON XL 2500 03-04 (145 amp, opt KG3)
YUKON XL 2500 05 (145 amp, opt KG3), ID 10464476

dont forget to make sure its a 4 pin......and not a later 2 pin

check out the sticky on the truck alts

I want to buy a brand new Ac Delco one. Not a reman. So what AC Delco part number would i use? When I go to rockauto they are coming up as 105amp ones. Not the 145.

Just get a low mileage one off of eBay. Type KG3 alternator I did it n it's been good to me so far.

http://ls1tech.com/forums/13597443-post88.html

Will this one work?

http://www.ebay.com/itm/08-09-GMC-SIERRA-1500-PICKUP-Alternator-145-amp-opt-KG3-/380434645142?pt=Motors_Car_Truck_Parts_Accessories&hash=item5893ac0096&vxp=mtr

the 4 pin changed to 2 pin around 05.....so i dont think that will work.....and i think the ac/delcos are remans

http://ls1tech.com/forums/generation-iii-external-engine/1287967-fix-my-endless-alternator-failures.html

read.....there will be a test

I have a 170A and a cap in with my stereo and and optima redtop and the battery gauge still dips to the has marks when im at the stop light. The previous OEM model never did that it just stayed at 13V

The new AC Delco's are reman from what i was told by my dealer and what I could find online. Its funny cause on my v6 I just bought a Brand New alternator by AC Delco for it. I ended up getting one from a 2003 chevrolet tahoe 145amp from NAPA for the TransAm. It's a brand new one, not remaned. I've never had good luck with reman stuff so i wanted to stay away from it. It has a lifetime warranty on it as well for what that's worth. I don't plan to keep the car long but while I do have it for my mind sake I want it to have the best and be reliable. Wanna do the Big 3 upgrade soon so all the electronic part is finished and taken care of.