Different spark plugs to run?

[tbmdsd]

What other brands/types of spark plugs are available for the 4.2? I went to a NAPA and they said only the stock was available. I know guys on here have run others. I was just looking to find out what choices there are?

[HomerSimpson]

I see 2 different kind of Bosch plugs and auto zone. Here is what I got from their website......
SPARK PLUG for a
2005 CHEVROLET TRUCK TRAILBLAZER 4WDalueUnit
BOSCH-PLATINUM+4 (http://www.autozone.com/servlet/UiBroker?UseCase=C001&UserAction=performMoreDetail&Parameters=TRUE%7C%7ESPARK+PLUG%7C%7ENONE%7C%7EBOS CH-PLATINUM%2B4%7C%7EDO+NOT+REGAP++++++++%7C%7EFALSE% 7C%7EFALSE%7C%7E618321%7C%7E2252%7C%7E4482%7C%7ENO NE%7C%7E%245.99%7C%7ECHEVROLET+TRUCK%7C%7ETRAILBLA ZER+4WD%7C%7E2005%7C%7ENONE%7C%7E0.125%7C%7ENONE%7 C%7EB) DO NOT REGAP (http://www.autozone.com/servlet/UiBroker?UseCase=C001&UserAction=performMoreDetail&Parameters=TRUE%7C%7ESPARK+PLUG%7C%7ENONE%7C%7EBOS CH-PLATINUM%2B4%7C%7EDO+NOT+REGAP++++++++%7C%7EFALSE% 7C%7EFALSE%7C%7E618321%7C%7E2252%7C%7E4482%7C%7ENO NE%7C%7E%245.99%7C%7ECHEVROLET+TRUCK%7C%7ETRAILBLA ZER+4WD%7C%7E2005%7C%7ENONE%7C%7E0.125%7C%7ENONE%7 C%7EB) 4482 $5.99 http://www.autozone.com/images/icon_store_in.gifhttp://www.autozone.com/images/shopping/button_add_list.gif (http://www.autozone.com/servlet/UiBroker?UseCase=O001&UserAction=parseShoppinglist&Parameters=SPARK+PLUG%3D618321%3D2252%24_)http://www.autozone.com/images/icon_web_in.gif http://www.autozone.com/images/shopping/button_buy_online.gif (http://www.autozone.com/servlet/UiBroker?UseCase=O001&UserAction=parseShoppingCart&Parameters=SPARK+PLUG%3D618321%3D6998%24_) http://www.autozone.com/images/grey_line.gif
BOSCH-PLATINUM-2 (http://www.autozone.com/servlet/UiBroker?UseCase=C001&UserAction=performMoreDetail&Parameters=TRUE%7C%7ESPARK+PLUG%7C%7ENONE%7C%7EBOS CH-PLATINUM-2%7C%7EDO+NOT+REGAP++++++++%7C%7EFALSE%7C%7EFALSE% 7C%7E618322%7C%7E2252%7C%7E4314%7C%7ENONE%7C%7E%24 3.99%7C%7ECHEVROLET+TRUCK%7C%7ETRAILBLAZER+4WD%7C% 7E2005%7C%7ENONE%7C%7E0.125%7C%7ENONE%7C%7EB) DO NOT REGAP (http://www.autozone.com/servlet/UiBroker?UseCase=C001&UserAction=performMoreDetail&Parameters=TRUE%7C%7ESPARK+PLUG%7C%7ENONE%7C%7EBOS CH-PLATINUM-2%7C%7EDO+NOT+REGAP++++++++%7C%7EFALSE%7C%7EFALSE% 7C%7E618322%7C%7E2252%7C%7E4314%7C%7ENONE%7C%7E%24 3.99%7C%7ECHEVROLET+TRUCK%7C%7ETRAILBLAZER+4WD%7C% 7E2005%7C%7ENONE%7C%7E0.125%7C%7ENONE%7C%7EB) 4314 $3.99 http://www.autozone.com/images/icon_store_in.gifhttp://www.autozone.com/images/shopping/button_add_list.gif (http://www.autozone.com/servlet/UiBroker?UseCase=O001&UserAction=parseShoppinglist&Parameters=SPARK+PLUG%3D618322%3D2252%24_)http://www.autozone.com/images/icon_web_in.gif http://www.autozone.com/images/shopping/button_buy_online.gif (http://www.autozone.com/servlet/UiBroker?UseCase=O001&UserAction=parseShoppingCart&Parameters=SPARK+PLUG%3D618322%3D6998%24_) http://www.autozone.com/images/grey_line.gif

[tbmdsd]

sOMEBODY WAS TALKING ABOUT IRIDIUMS TOO. Sorry about the caps. I do autoCAD work and we do most everything in caps

[tblazed]

Much better off staying with ACDelco and avoiding Bosch plugs. I base that on the proven reliability of the ACDelcos that come in it from the factory with some owners reporting well over 100 k miles and no misfire detected which will set the SES light, and my bad experience in the past with Bosch Platinum plugs that were failing at 13,000 miles. My 3¢

[03slt_soccal]

i have been running the denso iridums for around 10k now without any problems runs the same. changed mine out at 70k they look the same as the delcos :)

[ScarabEpic22]

Much better off staying with ACDelco and avoiding Bosch plugs. I base that on the proven reliability of the ACDelcos that come in it from the factory with some owners reporting well over 100 k miles and no misfire detected which will set the SES light, and my bad experience in the past with Bosch Platinum plugs that were failing at 13,000 miles. My 3¢
I figured this out right after I installed the Platinum +4s, but after spending ~$35 for them, I dont really have any inclination to swap them out unless something happens. Have ~18K on them now, no problems so far. Next set will probably be Denso Iridiums.