ACDelcoGold 335-1086 (88877296) Alternator

This was a perfect fit for my 2002 Suburban. Took about 45 minutes from start to finish, and worked perfectly. This was one of the best priced options so I'm glad we choose this one from a long list of options. If it lasts half as long as the original one did, I'll call it a great value.

Like others mentioned, this new alternator does NOT have the raised “Delco” casting. It’s just how things are anymore. Most everything I buy, minus belts, seem to be made wherever anymore. So I don’t know how you guarantee build quality.Having said all that…here’s what I know. Local part houses have house brand reman alternators for $40-110 MORE than this NEW alternator. No core charge online. Local parts ranged in country of origin vary too….even within the same brand!So I bet on new AC Delco. Figure it’s a crap shoot so why not save some cash on a “traditionally solid” brand instead of reman house brand.Worked right away. No noises, 14.4 volts. I am satisfied with this purchase.No comment on longevity…my 2003 Suburban 5.3 got 201,000 out of the original Delco!!!I love my truck.If this gives me trouble I’ll update my post.Just really don’t like house brand remanufacturingHope this helps others out. I don’t see parts suppliers improving…so this is my logic for keeping my truck on the road..Pics of new one, pics of old one. For perfectly.Never grind ears down. Tap the spacers towards the front of the truck once you pry old alt out. Then new alt slips in easy. Tightening the two bolts will bring spacers back tight against alt. It’s a great system! Chevy built great drivelines in 2000-2006.

Really nice looking alternator, very simple install. functional & good voltage power, worth the value. Kepps battery charged very well. Fits perfect on any Chevy with a 105amp alternator.----2003 Silverado 1500 4x4, 5.3 LS----1 - Pop open beer...2- remove air filter3- loosen the belt ( belt tensioner ) ( 15mm )4- remove the 2 screws through the front ( 15mm )5- might need to use crowbar to lift out old alternator / put in new one6- unplug the 2 plugs in back7- replace with new alternator ( might need some massaging to put in )8- do step 6 -through 1 to finish install

I read some reviews where there were complaints of the alternator making a whining noise. This may be normal for new alternators until the brushes are seated. The alternator I installed made a slight whining noise but after 4,000 miles since installing it, I no longer hear it. The original alternator has 225,000 miles on it and was still working but as a "playing it safe" I decided to replace it because I didn't want to break down on a deserted highway somewhere between here and there.

on 2/28/24 I ordered this alternator for a 2003 GMC Yukon. Being and ACDelco Gold, I thought it would be good.Item was installed, and it made a loud chirping noise for the first 5 miles of operation. Battery was not being charged during this time as well. After 5 miles the voltage gauge needle would go to it's normal spot and noise would stop.on 3/4/24 I ordered a replacement because it was obvious that the first one was defective.Second unit arrived and was installed. Same issue as the first. 5-10 minutes of chirping (loud) would continue until unit started charging. I put up with this for a month, and then two weeks ago the unit would not stop chirping, nor would it charge the battery.I was in a bind and went to a local auto parts store. Replaced it with a new unit and no problems since.Now I go to return the AC Delco units back to AMAZON- I didn't realize that there was only a 30day window to return these items. SO NOW I HAVE TWO DEFECTIVE ALTERNATORS AS PAPER WEIGHTS.Will have to look at whether or not I continue to purchase through AMAZON

It’s genuine ACDelco, fits as expected and runs like it should for an amazing price compared to buying anything aftermarket at any local parts store.

For the price, you really can't beat this. I bought this for my '03 Chevy Silverado 2500HD w/ 6L (LQ4), which it fit as expected. Removal/install took me about 15 minutes, not including replacing the pulley (see below).Pros:Seems well built. Brand new-not a poorly re-manufactured unit like most other units at and above this price. Easily installed on the LQ4's accessory drive.Cons:Pulley was damaged upon arrival (one of the ridges was nicked, and unfortunately there was a slight bulge into one of the grooves, which would likely damage the serpentine belt) . Not wanting to go several more days without a working alternator, I decided to swap the pulley from my old alternator onto this unit instead of returning it. Given the price, I really can't complain too much on this issue. Alternator is assembled in Mexico. That's better than Made in China, but made in USA is always preferred if possible!Other thoughts:For those of you replacing one of these on the GM 6.0L truck engine, the following may prove helpful: You will likely need to pry the old one out. Just stick a prybar under the old alternator and pry it upward. (after removing the serpentine belt, of course!) Once you've worked it out, I found that it's easier to get the new one in if you take a hammer and gently work the little sleeves in the front holes of the mount towards the front of the truck (you just need a millimeter or so of movement. They'll snug back up to their original position when you install the new alternator). If you don't push these forward, the new alternator can be very hard to reinstall. (Of course, I'm not responsible if you break the mount or damage anything else while doing this!) Hopefully this helps someone.