ACDelco GM Original Equipment 41-162 (19417055) Iridium Spark Plug

I ordered this iridium spark plugs 41-162 because they were the same ones I had on my Silverado 6.0 truck . I was surprised to see that my old ones were still in good condition and I’ve owned the truck for 6 years but I went head and replaced them anyways because I know I won’t have to worry for another couple of years . The truck is running great , one thing to mention is to just check your spark plug gap I did had to re gap one of them .

These are great but out of 8 I got all were not the correct gap (.040) they were set closer to .035. After using "generic" one for a week and dealing with misfires I went with these and they seem great only thing is the gap was definitely not set to .040 still I recommend these and not bad price. They were priced just over $12 each or just over $13 for 2, which I opted to get the 2 pack (x4 as I needed 8) and seemed to be a good price but more than the generic ones that look similar (stay away from those!)

Great plugs factory parts

Great price!

Good plugs and fixed my miss firing problem, they are pre gaped from factory but two of the eight were .005 to .008 under engine specs. Check before installation to be on the safe side.

Don't get the platinum spark plugs. Get these iridium. They both fit great so don't be fooled like I was. Amazon and AutoZone will tell you the platinum ones fit but if you go to a GM parts finder only the iridium ones are recommended. So if you have a rough idle, intermittent hard crank but eventual start, these will likely solve your problem especially if you're running platinum. I had just rebuilt the heads on my 2007 Chevy Silverado 1500 V8 due to AFM lifter failure. I wasn't about to skip on the spark plugs but I did cheap out. I got maybe 300 miles out of the platinum ones before the rough idle and intermittent hard crank got bad enough for me to notice. It was too subtle to trigger any codes though. A mechanic friend told me these engines are notorious for running like crap due to the spark plugs if 1) they're not *exactly* at 0.040 gap and 2) if you run anything other than iridium. This is true especially for 2007 to 2013. He said there was a TSB for it but I never found it. Still, I replaced them and 600 miles later the truck is running smooth. As far as the gap accuracy please use a wire gauge and not the coin/ramp style. The AutoZone ramp style was off by 0.02 in my case. And trust me, the spark plugs will be messed up. For me only 2 of 8 came accurately gaped. I don't blame the manufacturer but the shipping process. I didn't want to deal with the gapping because you can mess up the electrode if you don't take your time adjusting the guard. This is why I thought getting some from AutoZone would be better. Theirs were bent worse plus they were more expensive. TLDR: get these.

Exact replacement part!

Fit perfectly in my 2011 tahoe, received fast!

They don’t come with plastic sleeves and some of the individual boxes the plugs fell out of. Packages were not great but the plugs themselves were fine.

Excelente calidad

Perfect

About a year ago, I replaced the plugs in my 6.0 Litre engine in my 2009 Yukon Hybrid. I recently noticed a "Fish bite miss" at idle. I scoped the coils and found some weird Ignition waveforms especially on #1. I pulled the plug and found half the insulator broken and missing. They were a "Quality Brand" Platinum Plug in a set, and 2 in the set were different part numbers. There OEM Iridium Plugs corrected the occasional irratic missing at idle and the engine is smooth again. GM recommends these plugs, and I agree.

Works like a charm.