# 94 suburban alternator question

**URL:** <https://community.cartalk.com/t/94-suburban-alternator-question/50610>\
**Category:** Maintenance/Repairs\
**Tags:** chevrolet, suburban, alternators\
**Created:** [June 20, 2010, 6:07pm UTC](https://community.cartalk.com/t/94-suburban-alternator-question/50610 "2010-06-20T18:07:34Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![popof9](https://avatars.discourse-cdn.com/v4/letter/p/5fc32e/32.png) [@popof9](https://community.cartalk.com/u/popof9)\
**Post date:** [June 20, 2010, 6:07pm UTC](https://community.cartalk.com/t/94-suburban-alternator-question/50610/1 "2010-06-20T18:07:34Z")

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I need to replace the alternator on my 1994 Chevy c1500 suburban, 5.7 liter, 2 wheel drive. it has dual a/c, and power everything.  
  
  
  
 The auto parts stores such as autozone, advance, pep boys, etc. list three options for the replacement alternator – a 120 amp, a 105 amp, and a 100 amp alternator.  
  
  
  
 How do I determine for sure which amp-rating alternator I currently have? I want a straight replacement of what I have now, whatever that is.  
  
  
  
 Thanks!

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**Author:** ![PvtPublic](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/pvtpublic/32/13089_2.png) [@PvtPublic](https://community.cartalk.com/u/PvtPublic)\
**Post date:** [June 20, 2010, 6:51pm UTC](https://community.cartalk.com/t/94-suburban-alternator-question/50610/2 "2010-06-20T18:51:02Z")

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Can you find a part number or any other identifying marks on the old alternator?

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**Author:** ![popof9](https://avatars.discourse-cdn.com/v4/letter/p/5fc32e/32.png) [@popof9](https://community.cartalk.com/u/popof9)\
**Post date:** [June 20, 2010, 7:22pm UTC](https://community.cartalk.com/t/94-suburban-alternator-question/50610/3 "2010-06-20T19:22:05Z")

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Will have a look. Thanks.

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**Author:** ![oldschool](https://avatars.discourse-cdn.com/v4/letter/o/e19adc/32.png) [@oldschool](https://community.cartalk.com/u/oldschool)\
**Post date:** [June 21, 2010, 2:12am UTC](https://community.cartalk.com/t/94-suburban-alternator-question/50610/4 "2010-06-21T02:12:32Z")

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Look on the RPO code sheet (perhaps the backside of glovebox, alternators have a “K” letter in front of them.Tell the parts people your vehicle is equipped with a "K"60 (100amp) K68 (105 amp) alternator.