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07-05-2020, 04:59 PM
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#1 |
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Registered User
Join Date: Mar 2001
Location: Hernando, MS USA
Posts: 1,152
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Which alternator is on my truck
2005 GMC Sierra 1500 2WD 5.3. Not heavily optioned. Power windows, door locks, electric fans. No Bose sound system, no power seats, no auto climate control. From what I have read, alternators are either 105, 140 or 160 amp. Which one do y'all think mine would be? Thanks.
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George Morgan Hernando, MS '69 C-10 swb fleetside '72 GMC swb Stepside |
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07-05-2020, 07:37 PM
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#2 |
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Registered User
Join Date: Aug 2015
Location: Las Vegas NV
Posts: 371
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Re: Which alternator is on my truck
Check your glove box for the RPO codes:
K65 - 105 amp dual K68 - 105 amp KG3 - 145 amp
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Customization is what you want it to look like -- not what other people think it should look like |
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07-06-2020, 10:34 AM
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#3 |
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Registered User
Join Date: Mar 2001
Location: Hernando, MS USA
Posts: 1,152
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Re: Which alternator is on my truck
Thank you. I'll look for it.
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George Morgan Hernando, MS '69 C-10 swb fleetside '72 GMC swb Stepside |
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07-06-2020, 01:11 PM
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#4 |
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State of Confusion!
  
Join Date: Jul 2002
Location: Gulfport, MS USA
Posts: 47,216
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Re: Which alternator is on my truck
George I would guess the 145 Amp. I also believe some came with 160. Last I remember the connectors are different for each style. Even my V6 had a 145 amp, but it was a pure Chevy of course
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Bill 1970 Chevy Custom/10 LWB Fleetside 2010 Toyota Tacoma PreRunner SR5 Double Cab - DD Member of Louisiana Classic Truck Club (LCTC) Bill's Gallery Life isn't tied with a bow, but it's still a gift. Live simply. Love generously. Care deeply. Speak kindly. Leave the rest to God! |
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07-06-2020, 01:38 PM
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#5 |
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Registered User
Join Date: Aug 2015
Location: Las Vegas NV
Posts: 371
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Re: Which alternator is on my truck
160 amps were commonly found on 2500/3500 trucks. I know the four 2500s I had in this year group were all 160. The two 1500s I have are 145.
However, this is all assuming you still have the original installed or it has been replaced with the right one in the past. Belt sizes are sometimes different between 105 and 145/160
__________________
Customization is what you want it to look like -- not what other people think it should look like |
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07-06-2020, 09:07 PM
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#6 |
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Registered User
Join Date: Mar 2001
Location: Hernando, MS USA
Posts: 1,152
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Re: Which alternator is on my truck
Belt sizes are sometimes different between 105 and 145/160[/QUOTE]
That's why I asked the question. About to replace both the serpentine belt and a/c belt. Many thanks for showing me what to look for.
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George Morgan Hernando, MS '69 C-10 swb fleetside '72 GMC swb Stepside |
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07-06-2020, 11:33 PM
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#7 |
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Moderator
 
Join Date: Oct 2008
Location: Wentworth, NH
Posts: 4,977
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Re: Which alternator is on my truck
If I'm unsure I buy both belts and return the one that doesn't fit.
I put the PN of the one that fits in my maintenance spreadsheet on Google Docs so next time I don't have to wonder.
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1959 M35A2 LDT465-1D SOLD 1967 Dodge W200 B383, NP420/NP201 SOLD 1969 Dodge Polara 500 B383, A833 SOLD 1972 Ford F250 FE390, NP435/NP205 SOLD 1976 Chevy K20, 6.5L, NV4500/NP208 SOLD 1986 M1008 CUCV SOLD 2000 GMC C2500, TD6.5L, NV4500 2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263 2009 Impala SS LS4 V8 RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials...
And please let us know if and how your repairs were successful. |
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