Alternator size 105A or 145A?

whizbanger1 · December 27, 2011

I'm trying to figure out what size alt I have so I can get the correct belt. How can I tell? I'm @62k, anything else while I'm changing the belt?

Zembonez · December 27, 2011

Pull the Delco part number off of the alternator and plug it into Google. That's how I did it on my Dad's Suburban. Instant results!

whizbanger1 · December 27, 2011

Never crossed my mind. Thanks!

tesnoboy · December 27, 2011

^{Look at your code decal. K68 is 105 amp. Check your tensioner and idler pulley to make sure they spin freely without bearing noise.}

CapitalTruck · December 28, 2011

62k is too early to be changing these belts. They're on a change interval of 120k (I'd never go that long, but 90-100k seems reasonable). I waited until 100k to do mine. I also changed the tensioners and idler pulley. I figured why not, it's every 100k, not too much work or $$ considering the possible problems it prevents.

whizbanger1 · January 2, 2012

I thought its early too, but the squeaking drives me nuts! Looking @ Gatorbacks.

CapitalTruck · January 2, 2012

ah, didn't know there was squeeking going on. Make sure the pulleys are all lined up right.

tesnoboy · January 2, 2012

You live in Texas where the heat will wear stuff quicker. My tensioner and idler pulley were going bad wearing out my belt and making it slip. I don't like noise either! ;-)

05 Chevdmax · January 7, 2012

If you have a small chirp going on under the hood then I would check your belt pulleys mine went out and took out the belt. The belt was over 80.00 not cheap pulleys were only 26.99.

whizbanger1 · January 7, 2012

Well I got my Gatorback, $26 free shipping on Amazon. Once I start digging, I'll see if anything else is shot. I wanted to order a tensioner too, but Amazon didn't have a AC Delco. They had Goodyear tensioner also, but I figured it was probably a rebranded Dayco or something. I'd like to stay OEM but open to suggestions on other brands.