ACDelco GM Original Equipment 19210687 Multi-Port Fuel Injector Assembly

My 97 silverado stopped running. Csfi seemed to be the problem. Found this little gem for a great deal. Delivery was fast. This system fit perfectly in the clip and the injectors clicked right in. My only problem was my forgetting to lube the o-ring on the main body. And the lack of pictures, sorry.

Was a good price for AC Delco made big difference in the power & has been doing so for 2 tanks of gas. I also changed my plugs and fuel filter

I paid +$400 for this AC Delco part in the hopes that I wouldn't have any problems. It failed in less than a year and Amazon's reseller, RockBottomAuto, would not honor the warranty, so I had to purchase another brand new unit. I went to O'Reilly for the new one and haven't had any problems, and if I do have an issue, I know they'll replace the part without any run-around.

Perfect replacement for the vortec 5.7LBetter response and idle.

OEM product, very expensive. The packaging should of been better.

After doing a lower intake change & digging out a broken quick connect for the coolant hose on my 99 Suburban 5.7 I had originally cleaned up the entire intake & stock injectors & reinstalled it all. Come to find that after cleaning everything & putting it all back together the stock injectors were leaking severely. I knew that there as a leak but didn't know how bad as the amount of carbon build up hid much of the evidence. With the engine only running on a steady supply of starter fluid I knew fuel was my issue. I had searched before with the plan to eventually upgrade to this but that eventuality came sooner than expected. I ordered this new style & it came within a few days very well packaged.It's stated that the tubes are stiff & somewhat fragile, while the stiff part is correct I found it all to be entirely rugged.Getting everything to seat in the original holding clamp was difficult, but with care & time it fit just right. The engine starts far better than before, runs much stronger & fuel economy has increased.My advice, if your in there just go for the upgrade.It really is a world of difference.It did also come with a new gasket.

I bought this in June of 2022 , the truck ran great for about 4,000 miles. I'm just out of warranty and #2 injector has died. Don't bother spending the extra money on a/c delco, it's the same offshore junk parts like everyone else.I put an an a/c delco water pump last week and it lasted 1 day before leaking out the rear cover gasket.They don't make them like they use too.

My 1999 Suburban with the 5.7 Vortec was having starting issues but only in cold weather. It could sit for days and start right up as long as the outside temperature was above 50 degrees. We couldn’t figure out what was causing it because once it started it would run great. I heard the spider injectors had some issues on these trucks so I took off the throttle body and took some pictures inside the upper intake manifold. I found that fuel was leaking out of a couple of the injectors. I decided that even if that didn’t fix the cold starting issue, it still needed to be done. I bought these for a great price but they took about 3 or 4 days to get back into stock and shipped. When they arrived, me and a mechanic friend immediately went to work and replaced the old injectors and reinstalled everything in about 3 hours. It wasn’t a huge job, but it definitely wasn’t easy. There’s a lot of wiring that needs to be undone and moved out of the way. Anyway, the old injectors were indeed the culprit for the cold starting issue and now it starts like a dream, even when it’s close to 0 degrees out! Haven’t noticed a huge increase in fuel economy or power but it was definitely worth it for the fact that the thing starts like a normal vehicle would now. Very happy with the results.