Alternator size

[rollinjoy]

i have 2002 Yukon Denali xl. How can I tell if I have the 105 amp or 130 amp alternator? Need to replace my belt and tensioner

 

[GreyStone]

i have 2002 Yukon Denali xl. How can I tell if I have the 105 amp or 130 amp alternator? Need to replace my belt and tensioner

should be an RPO code in the glovebox door. Look for a code that starts with K

 

[Fless]

The amp rating should be stamped into the alternator housing.

Or, see this link for some of the RPO codes (your RPO codes should be inside the glovebox lid); just match yours. Unless the alternator has been changed to a different size.
https://www.tahoeyukonforum.com/threads/alternator-amperage.8256/#post-116152

 

[rollinjoy]

130amp? I see kg8

 

[GreyStone]

130amp? I see kg8View attachment 253882

Bingo!