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05-15-2017, 02:17 PM
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#1 |
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Registered User
Join Date: Dec 2002
Location: Cactus Patch So. Az
Posts: 4,749
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Time to replace spark plugs ??
2003 LS 5.3 in our GMC pick up is in need of new spark plugs.
There are many choices out there so where to start Stock replacements, or is there something better for mileage and or performance? Add to ListCompare Item 2003 GMC Truck Sierra 1500 2WD 5.3L MFI OHV 8cyl Autolite XP Iridium Spark Plug, Part Number: XP5245 Fits Your Vehicle Autolite XP Iridium Spark Plug Price: $6.99 Mail-in Rebate - View Now Part Number: XP5245 Notes: In Stock Ship To Home In Stock ADD TO CART Add to ListCompare Item 2003 GMC Truck Sierra 1500 2WD 5.3L MFI OHV 8cyl Bosch Iridium Spark Plug, Part Number: 9602 Fits Your Vehicle Bosch Iridium Spark Plug Price: $6.99 Part Number: 9602 Notes: Gap is pre-set. Do not gap. In Stock Ship To Home In Stock ADD TO CART Add to ListCompare Item 2003 GMC Truck Sierra 1500 2WD 5.3L MFI OHV 8cyl NGK IX Iridium Spark Plug, Part Number: 7397 Fits Your Vehicle NGK IX Iridium Spark Plug Price: $7.99 Mail-in Rebate - View Now Part Number: 7397 Notes: (See Reviews) In Stock Ship To Home In Stock ADD TO CART Add to ListCompare Item 2003 GMC Truck Sierra 1500 2WD 5.3L MFI OHV 8cyl NGK Laser Iridium Spark Plug, Part Number: 1465 Fits Your Vehicle NGK Laser Iridium Spark Plug Price: $9.99 Mail-in Rebate - View Now Part Number: 1465 Notes: (See Reviews) In Stock Ship To Home In Stock ADD TO CART Add to ListCompare Item 2003 GMC Truck Sierra 1500 2WD 5.3L MFI OHV 8cyl Denso Iridium Spark Plug, Part Number: 5090 Fits Your Vehicle Denso Iridium Spark Plug Price: Not Available Part Number: 5090 Notes: Long life Not Available Ship To Home Not Available ADD TO CART Add to ListCompare Item 2003 GMC Truck Sierra 1500 2WD 5.3L MFI OHV 8cyl Denso Iridium TT Spark Plug, Part Number: 4713 Fits Your Vehicle Denso Iridium TT Spark Plug Price: $7.99 Part Number: 4713 Notes: Order in Store Ship To Home In Stock ADD TO CART Add to ListCompare Item 2003 GMC Truck Sierra 1500 2WD 5.3L MFI OHV 8cyl Autolite Double Plat Spark Plug, Part Number: APP5245 Fits Your Vehicle Autolite Double Plat Spark Plug Price: $4.79 Part Number: APP5245 Notes: In Stock Ship To Home In Stock ADD TO CART Add to ListCompare Item 2003 GMC Truck Sierra 1500 2WD 5.3L MFI OHV 8cyl Bosch Dbl Platinum Spark Plug, Part Number: 8104 Fits Your Vehicle Bosch Dbl Platinum Spark Plug Price: $5.19 Part Number: 8104 Notes: Gap is pre-set. Do not gap. In Stock Ship To Home In Stock ADD TO CART Add to ListCompare Item 2003 GMC Truck Sierra 1500 2WD 5.3L MFI OHV 8cyl ACDelco Double Plat Spark Plug, Part Number: 41-962 Fits Your Vehicle ACDelco Double Plat Spark Plug Price: $7.29 Mail-in Rebate - View Now Part Number: 41-962 Notes: (See Reviews) In Stock Ship To Home In Stock ADD TO CART Add to ListCompare Item 2003 GMC Truck Sierra 1500 2WD 5.3L MFI OHV 8cyl NGK Laser Dbl Plat Spark Plug, Part Number: 3784 Fits Your Vehicle NGK Laser Dbl Plat Spark Plug Price: $8.19 Mail-in Rebate - View Now Part Number: 3784 Notes: Order in Store Ship To Home In Stock ADD TO CART Add to ListCompare Item 2003 GMC Truck Sierra 1500 2WD 5.3L MFI OHV 8cyl Autolite Platinum Spark Plug, Part Number: AP5245 Fits Your Vehicle Autolite Platinum Spark Plug Price: $3.09 Part Number: AP5245 Notes: (See Reviews) In Stock Ship To Home In Stock ADD TO CART Add to ListCompare Item 2003 GMC Truck Sierra 1500 2WD 5.3L MFI OHV 8cyl Bosch Platinum Spark Plug, Part Number: 6704 Fits Your Vehicle Bosch Platinum Spark Plug Price: $3.29 Part Number: 6704 Notes: Gap is pre-set. Do not gap. In Stock Ship To Home In Stock ADD TO CART Add to ListCompare Item 2003 GMC Truck Sierra 1500 2WD 5.3L MFI OHV 8cyl ACDelco RpdFire Plat Spark Plug, Part Number: 6 Fits Your Vehicle ACDelco RpdFire Plat Spark Plug Price: $5.19 Mail-in Rebate - View Now Part Number: 6 Notes: In Stock Ship To Home In Stock ADD TO CART Add to ListCompare Item 2003 GMC Truck Sierra 1500 2WD 5.3L MFI OHV 8cyl NGK GP Platinum Spark Plug, Part Number: 3186 Fits Your Vehicle NGK GP Platinum Spark Plug Price: $3.49 Part Number: 3186 Notes: (See Reviews) In Stock Ship To Home In Stock ADD TO CART Add to ListCompare Item 2003 GMC Truck Sierra 1500 2WD 5.3L MFI OHV 8cyl Denso Platinum TT Spark Plug, Part Number: 4511 Fits Your Vehicle Denso Platinum TT Spark Plug Price: $3.69 Part Number: 4511 Notes: Order in Store Ship To Home In Stock ADD TO CART Add to ListCompare Item 2003 GMC Truck Sierra 1500 2WD 5.3L MFI OHV 8cyl Autolite Copper Spark Plug, Part Number: 5245 Fits Your Vehicle Autolite Copper Spark Plug Price: $2.09 Part Number: 5245 Notes: In Stock Ship To Home In Stock ADD TO CART Add to ListCompare Item 2003 GMC Truck Sierra 1500 2WD 5.3L MFI OHV 8cyl ACDelco Copper Spark Plug, Part Number: R44LTSM Fits Your Vehicle ACDelco Copper Spark Plug Price: $2.49 Mail-in Rebate - View Now Part Number: R44LTSM Notes: In Stock Ship To Home In Stock ADD TO CART Add to ListCompare Item 2003 GMC Truck Sierra 1500 2WD 5.3L MFI OHV 8cyl NGK V Power Copper Spark Plug, Part Number: 2238 Fits Your Vehicle NGK V Power Copper Spark Plug Price: $2.49 Part Number: 2238 Notes: In Stock Ship To Home In Stock ADD TO CART Add to ListCompare Item 2003 GMC Truck Sierra 1500 2WD 5.3L MFI OHV 8cyl Champion Copper Spark Plug, Part Number: 401 Fits Your Vehicle Champion Copper Spark Plug Price: $2.99 Part Number: 401 Notes: (See Reviews) In Stock Ship To Home In Stock ADD TO CART Add to ListCompare Item 2003 GMC Truck Sierra 1500 2WD 5.3L MFI OHV 8cyl E3 Spark Plug, Part Number: E3.54 Fits Your Vehicle E3 Spark Plug Price: $6.09 Part Number: E3.54 Notes: Order in Store Add to ListCompare Item 2003 GMC Truck Sierra 1500 2WD 5.3L MFI OHV 8cyl Pulstar Spark Plug, Part Number: AD1H10
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53 TuTone Extended Cab 350 4-Spd 3:08 (SOLD) 53 Chevy Moldy pearl green ZZ-4 4L60E 9" 3:25 55 GMC 1st Black Mll (ZZ4) ZZ6 TKO 600 5 sp 3:73 62 Solidaxle Corvette Roman Red (327 340hp 4spd 3:36) C4 & C5 suspension tube chassis LS 3 4L70E 65 Corvette Coupe 327 350hp 4spd 4:11 78 Black Silverado SWB (350/350) 5.3 & 4L60E 3:42 2000 S-Type 3.0 (wife cruiser) 2003 GMC SCSB 5.3 4L60E 3:42 |
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05-15-2017, 03:53 PM
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#2 |
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Registered User
 
Join Date: May 2011
Location: Missoula, MT
Posts: 934
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Re: Time to replace spark plugs ??
I usually go with the Autolite Iridium tips, but last year gave the the NGK Iridiums a try and they seem just fine, no noticeable difference. The iridium give the spark plug a real long life, copper plugs don't last very long. I have tried the e3 plugs and I instantly had random misfires, took them back to the parts store and replaced them with the Autolite Iridium and never looked back.
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69 GMC C10 build thread- http://67-72chevytrucks.com/vboard/s...d.php?t=501676 03 Silverado build thread-http://67-72chevytrucks.com/vboard/s...d.php?t=591582 |
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05-15-2017, 08:00 PM
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#3 |
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meowMEOWmeowMEOW
Join Date: Sep 2009
Location: MKE WI
Posts: 7,128
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Re: Time to replace spark plugs ??
If you make power, copper NGK's @ 1.79, change 'em every season and leave the rest of that stuff in the parts bin.
For my daily stuff, 'Delco Iridiums (or whatever they call their OE-spec plug) or the NGK Iridiums.
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'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING  |
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05-16-2017, 09:24 AM
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#4 |
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Registered User
Join Date: Jul 2016
Location: Brandon,MS
Posts: 489
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Re: Time to replace spark plugs ??
Axel let us know what you go with. Im in the process of disassembling and cleaning a 4.8 hoping to get in next month. I will be changing plugs and would like to know what you decide to use. Thanks.
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