20 Best 4.3 Vortec Spider Injector in 2024 Reviews and Buying Guide

2,911 Reviews Scanned

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1 TamerX Vortec Spider Fuel Injector Assembly with Plenum Gasket Kit for Chevrolet/GMC 4.3L TamerX Vortec Spider Fuel Injector Assembly with Plenum Gasket Kit for Chevrolet/GMC 4.3L
2 LOREADA FJ503 Spider Fuel Injector 6 Cylinder Replacement for Chevy Express Silverado P30 K1500 GMC... LOREADA FJ503 Spider Fuel Injector 6 Cylinder Replacement for Chevy Express Silverado P30 K1500... No ratings yet
3 TamerX Vortec Spider Fuel Injector Assembly for Chevrolet/GMC 4.3L TamerX Vortec Spider Fuel Injector Assembly for Chevrolet/GMC 4.3L No ratings yet
4 Standard Motor Products FJ503 Fuel Injector Standard Motor Products FJ503 Fuel Injector No ratings yet
5 FJ503 Spider Fuel Injector Replacement for Chevy Express Silverado 1500 Astro Blazer GMC Sierra... FJ503 Spider Fuel Injector Replacement for Chevy Express Silverado 1500 Astro Blazer GMC Sierra... No ratings yet
6 OEMCSP Spider Fuel Injector FJ503 w/Retaining Bracket SCPI to MPFIFJ10565 217-3028 12568332 For... OEMCSP Spider Fuel Injector FJ503 w/Retaining Bracket SCPI to MPFIFJ10565 217-3028 12568332 For... No ratings yet
7 Dasbecan Spider Fuel Injector w/Retaining Bracket Compatible with 1996-2005 Chevy Chevrolet GMC GM... Dasbecan Spider Fuel Injector w/Retaining Bracket Compatible with 1996-2005 Chevy Chevrolet GMC... No ratings yet
8 YZHIDIANF FJ503 Spider Fuel Injectors for:-Chevy for:-GMC Astro Blazer C1500 Express K1500 P30 S10... YZHIDIANF FJ503 Spider Fuel Injectors for:-Chevy for:-GMC Astro Blazer C1500 Express K1500 P30... No ratings yet
9 YZHIDIANF FJ503 Vortec Spider 4.3L Fuel Injector Fit For:-Chevy Silverado 1500 Astro Blazer Express... YZHIDIANF FJ503 Vortec Spider 4.3L Fuel Injector Fit For:-Chevy Silverado 1500 Astro Blazer...
10 B.ZSSY FJ503 Spider Fuel Injectors 6 Cylinder Compatible for Chevy Express Silverado 1500 Astro... B.ZSSY FJ503 Spider Fuel Injectors 6 Cylinder Compatible for Chevy Express Silverado 1500 Astro... No ratings yet
11 YZHIDIANF Upgraded FJ503 4.3L Vortec Spider Fuel Injector Fit For:-Chevy Astro Blazer S10 Silverado... YZHIDIANF Upgraded FJ503 4.3L Vortec Spider Fuel Injector Fit For:-Chevy Astro Blazer S10... No ratings yet
12 SZKAIDAG Upgraded Spider Fuel Injector, for:-Chevy Astro Blazer C1500 Express, for:-GMC Jimmy K1500... SZKAIDAG Upgraded Spider Fuel Injector, for:-Chevy Astro Blazer C1500 Express, for:-GMC Jimmy... No ratings yet
13 HiSport Retaining Clips Kit Replacement for Vortec Fuel Injector Compatible with Chevrolet GMC 4.3L... HiSport Retaining Clips Kit Replacement for Vortec Fuel Injector Compatible with Chevrolet GMC... No ratings yet
14 Nakkaa FJ503 Spider Fuel Injector w/Bracket V6 Compatible with Savana Sierra Safari Express Astro... Nakkaa FJ503 Spider Fuel Injector w/Bracket V6 Compatible with Savana Sierra Safari Express Astro... No ratings yet
15 Aumzong FJ503 Spider Fuel Injector Compatible with 1996-2002 Chevrolet Chevy GMC Oldsmobile 4.3l... Aumzong FJ503 Spider Fuel Injector Compatible with 1996-2002 Chevrolet Chevy GMC Oldsmobile 4.3l...
16 A-Premium Fuel Injector Assembly w/Bracket Compatible with Chevy, GMC Models - V6 4.3L - Silverado... A-Premium Fuel Injector Assembly w/Bracket Compatible with Chevy, GMC Models - V6 4.3L -...
17 FJ503 Fuel Injector Compatible with Chevy Blazer S10 Express Silverado Astro GMC Jimmy 1500 C1500... FJ503 Fuel Injector Compatible with Chevy Blazer S10 Express Silverado Astro GMC Jimmy 1500 C1500... No ratings yet
18 PTNHZ Spider Fuel Injector FJ503 w/Retaining Bracket SCPI to MPFI FJ10565 217-3028 833-22102-6... PTNHZ Spider Fuel Injector FJ503 w/Retaining Bracket SCPI to MPFI FJ10565 217-3028 833-22102-6... No ratings yet
19 Fuel Spider Injector Assembly W/Bracket Replacement For 1996-02 GM Chevy Pickup Trucks Suburban... Fuel Spider Injector Assembly W/Bracket Replacement For 1996-02 GM Chevy Pickup Trucks Suburban... No ratings yet
20 NEWZQ Central Fuel Spider Injector w/Bracket 4.3L V6 Compatible with Chevy Astro Blazer C1500... NEWZQ Central Fuel Spider Injector w/Bracket 4.3L V6 Compatible with Chevy Astro Blazer C1500... No ratings yet

Bestseller No. 1
TamerX Vortec Spider Fuel Injector Assembly with Plenum Gasket Kit for Chevrolet/GMC 4.3L
  • Includes all necessary parts and gaskets to perform a complete installation.
  • Ensures smooth engine operation, cleaner emissions, improved fuel economy, and increased performance.
  • Includes complete gasket set that kits from other manufacturers do not offer.
  • High Quality
  • Compatible with CHEVROLET / GMC, ENGINE: 4.3L VORTEC, YEAR: 1996-2001
Bestseller No. 2
LOREADA FJ503 Spider Fuel Injector 6 Cylinder Replacement for Chevy Express Silverado P30 K1500 GMC...
  • 【FJ503 Replace Part Numer】 FJ503 Fuel Injectors: 19210688, 12568332, 88894353; Fuel Injectors Motor : 17113273; Replace: FJ503, FJ10565,...
  • 【Confirmed Fit】 Fuel Spider Injector for 4.3L V6 Engine compatible with 1996-2005 Chevrolet Astro; 1996-2005 Chevrolet Blazer; 1996-1998 Chevrolet...
  • 【Confirmed Fit】Automotive Replacement Fuel Injectors for 1996-1998 GMC K1500; 1996-2002 GMC Jimmy; 1996-1999 GMC P3500; 1996-1998 GMC C1500;...
  • 【Function】High Quality Fuel injectors can effectively prevent fuel exposure, reduce fuel waste, improve fuel utilization, and minimize stickiness...
  • 【Customer Service】 We offer ONE Year free return or refund Warranty. This FJ503 Spider Fuel Injector comes as shown in the picture, Please read...
Bestseller No. 3
TamerX Vortec Spider Fuel Injector Assembly for Chevrolet/GMC 4.3L
  • TamerX Spider Fuel Injector Assembly Central Port Injection We guarantee fit and function.
  • This TamerX central port fuel injection assembly for the 1996-2001 Chevrolet/GMC Spider Fuel Injector Assembly GM 4.3L GM V6 Engine. This is a...
  • The TamerX Spider Assembly is 100% tested to meet or exceed OEM specifications. The replacement of your old unit with the TamerX Spider will provide...
  • The assembly comes with new Viton O-Rings, Fuel Pressure Regulator. Application: Make: Chevrolet,GMC Model: SUV, Truck Engine: 4.3L V6 Year: 1996-2001...
Bestseller No. 4
Standard Motor Products FJ503 Fuel Injector
  • Country Of Origin : China
  • The Package Height Of The Product Is 3.37 Inches
  • The Package Length Of The Product Is 2.0 Inches
  • The Package Width Of The Product Is 1.43 Inches
Bestseller No. 5
FJ503 Spider Fuel Injector Replacement for Chevy Express Silverado 1500 Astro Blazer GMC Sierra...
  • Replace Part Number:‎FJ503, FJ10565, 2173028, 217-3028 89060439, 833-22102-6, 800-1512N, 25331863, 17113295, 17114164,...
  • Compatible with: For Chevrolet Silverado 1500 1999-2002,For Chevy S10 1996-2002,For Chevrolet P30 1996-1999,For Chevrolet K1500 1996-1998,For...
  • HIGH QUALITY: Multi-Port Fuel Injection Replacement Parts - Spider fuel injectors are a special type of fuel injection system commonly used in...
  • PREMIUM QUALITY: Durable, designed with premium materials for increased reliability and durability; internal sealing rings are protected from fuel...
  • After-sales service: 1 year warranty. Please check the compatibility before purchase to make sure the part fits your vehicle. If you have any...
SaleBestseller No. 6
OEMCSP Spider Fuel Injector FJ503 w/Retaining Bracket SCPI to MPFIFJ10565 217-3028 12568332 For...
  • Spider Fuel Injector 6 Cylinder w/Retaining Bracket for 1996-2002 Chevy Chevrolet GMC GM Truck Pickup V6 4.3L FJ10565 FJ503 217-3028 12568332 89060439
  • Stainless-steel calibration slide and spring assembly prevents corrosion within the fuel control body, which leads to an extended service life.
  • Precision-wound and precision-trimmed solenoid windings allow the computer to command efficient delivery of fuel. High-temp O-rings enable prolonged...
  • Part Number:FJ503, FJ10565, 217-3028, 2173028, 89060439 833-22102-6, 25331863, 800-1512N, 17113295, 17114164 17091628, 17113273, 19210688, 12568332,...
  • Package Included: 1x Fuel Injector; 1x Retaining Bracket with Bolt.
Bestseller No. 7
Dasbecan Spider Fuel Injector w/Retaining Bracket Compatible with 1996-2005 Chevy Chevrolet GMC GM...
  • Compatible with Chevrolet Astro 1996-2005, Blazer 1996-2005, C1500 Pickup 1996-1998, Express1500 1996-2006, Express 2500 1996-2005, K1500...
  • Compatible with GMC C1500 Pickup 1996-1998, Jimmy 1996-2002, K1500 Pickup 1996-1998, P3500 1996-1999, Safari 1996-2005, Savana 1500 1996-2006.
  • Replaces Part Numbers: 19210688, 12568332, 88894353,17113273,FJ503, FJ10565, 217-3028, 2173028, 89060439, 833-22102-6, 25331863, 800-1512N, 17113295,...
  • Damaged can be directly replaced, easy to install. Please confirm the part number and model before ordering.
  • 1 Year Warranty, refund for product problems
SaleBestseller No. 8
YZHIDIANF FJ503 Spider Fuel Injectors for:-Chevy for:-GMC Astro Blazer C1500 Express K1500 P30 S10...
  • ⭐⭐⭐⭐⭐【Fitments】Please use "amazon confirmed fit" above to verify fitment before purchasing. 4.3L V6 GAS for:-Chevy 1996-2005 Astro //...
  • 🏆【OE Number】FJ503, 12568332, 17113673, 322-04819, 217-3028, 16-9706, FJ10565, 8001512N, 4G1887, 240408, 217-3252, FJ10565-11B1
  • 🏆【100% Strict Quality Control】All Of YZHIDIANF Fuel Injectors Undergo Strict Quality Control Not Just Before Shipping But Throughout The...
  • 🏆【Regular Cleaning Fuel Injectors】Generally Speaking, If The Car Is In Good Condition And The Fuel Quality Is Good, It Can Be Done Every...
  • 🏆【Enhanced Performance】YZHIDIANF Fuel injectors Are Manufactured To The OE Specification To Provide Factory-fresh Appearance And Direct-fit,...
Bestseller No. 9
YZHIDIANF FJ503 Vortec Spider 4.3L Fuel Injector Fit For:-Chevy Silverado 1500 Astro Blazer Express...
  • ⭐⭐⭐⭐⭐【OEM Numbers】FJ503, 12568332, 17113673, 322-04819, 217-3028, 16-9706, FJ10565, 8001512N, 4G1887, 240408, 217-3252, FJ10565-11B1....
  • 🔥【Application】Fits 🔥For:-Chevy 1996-2005 Astro 4.3L V6, 1996-2004 Blazer 4.3L V6, 1996-1998 C1500 4.3L V6, 1996-2006 Express 1500 4.3L V6,...
  • 🔥【High Quality Material】Craft With Stainless Steel Slide And Spring Assembly, Leading To Longer Service Life Of Fuel Injection System....
  • 🔥【Fully Demonstrate Power】Fuel injector Are Manufactured To The OE Specification To Provide Factory-fresh Appearance And Direct-fit, That...
  • 🔥【100% Strict Quality Control】During Each Step Of Production Multiple Quality Control Checks Are Performed To Meet Or Exceed Oe (Original...
Bestseller No. 10
B.ZSSY FJ503 Spider Fuel Injectors 6 Cylinder Compatible for Chevy Express Silverado 1500 Astro...
  • 1.【Fitment 1】Spider Fuel Injector Only Fit for 4.3L V6 Engine,Compatible with 1996-2005 Chevy Astro Blazer Express 2500,1996-2014 Chevy Express...
  • 2.【Fitment 2】6 Cylinder Fuel Spider Injector Compatible with 1996-1998 GMC C1500 K1500,1996-1999 GMC P3500,1996-2002 GMC Jimmy,1996-2004 GMC...
  • 3.【Material】FJ503 Fuel Injector Assembly made of plastic tube and metal bracket.Designed like a spider delivers fuel into the cylinder,can help...
  • 4.【Manufacturer Part Number】:Replce for 12568332,17113673,322-04819,217-3028,FJ503,16-9706,FJ10565,800-1512N,4G1887,240408,217-3252.Note:Please do...
  • 5.【Package】1 x Fuel Spider lnjectors Kit and brackets.Please note that before installing the injector and fix the bracket on the injector to...
Bestseller No. 11
YZHIDIANF Upgraded FJ503 4.3L Vortec Spider Fuel Injector Fit For:-Chevy Astro Blazer S10 Silverado...
  • ⭐⭐⭐⭐⭐【OEM Numbers】FJ503, 12568332, 17113673, 322-04819, 217-3028, 16-9706, FJ10565, 8001512N, 4G1887, 240408, 217-3252, FJ10565-11B1....
  • 🔥【Application】Fits 🔥For:-Chevy 1996-2005 Astro 4.3L V6, 1996-2004 Blazer 4.3L V6, 1996-1998 C1500 4.3L V6, 1996-2006 Express 1500 4.3L V6,...
  • 🔥【High Quality Material】Craft With Stainless Steel Slide And Spring Assembly, Leading To Longer Service Life Of Fuel Injection System....
  • 🔥【Fully Demonstrate Power】Fuel injector Are Manufactured To The OE Specification To Provide Factory-fresh Appearance And Direct-fit, That...
  • 🔥【100% Strict Quality Control】During Each Step Of Production Multiple Quality Control Checks Are Performed To Meet Or Exceed Oe (Original...
Bestseller No. 12
SZKAIDAG Upgraded Spider Fuel Injector, for:-Chevy Astro Blazer C1500 Express, for:-GMC Jimmy K1500...
  • ⭐⭐⭐⭐⭐【FITMENTS】Fits For:-Chevy 1996-2005 Astro, 1996-2005 Blazer, 1996-1998 C1500, 1996-2006 Express 1500, For:-GMC 1996-1998 C1500,...
  • 🍀【OEM】 OE Numbers:FJ503, 12568332, 17113673, 322-04819, 217-3028, 16-9706, FJ10565, 8001512N, 4G1887, 240408, 217-3252, FJ10565-11B1
  • 🍀【IMPROVED FUEL EFFICIENCY】The Spider Fuel Injector is designed to enhance fuel efficiency by providing precise fuel delivery to each cylinder....
  • 🍀【ENHANCED ENGINE PERFORMANCE】Experience a noticeable boost in engine performance with the Spider Fuel Injector. By delivering fuel at the...
  • 🍀【DURABILITY AND RELIABILITY】Constructed with high-quality materials, the Spider Fuel Injector is built to last. It is engineered to withstand...
Bestseller No. 13
HiSport Retaining Clips Kit Replacement for Vortec Fuel Injector Compatible with Chevrolet GMC 4.3L...
  • [INSTALLATIONS] - Easy to install !!! Put the clip on the connector and press it a few times to fix it
  • [PRODUCT INFORMATION] - Use the high quality ABS plastic material,dimension:7.0mm*18.0mm*60.0mm,pack into (8 pcs/set)
  • [COMPATIBILITY] - This injector SCPI retaining clips replacement for spider fuel injector assembly compatible for Chevy/GMC 4.3L 5.0L/5.7L V6 V8...
  • [HIGH CONTROL QUALITY] - All fuel injector clips are benches tested in-house before packaging and shipment to our customers, your satisfaction is our...
  • [POST SERVICE] - After receiving the product, you can consult us how to install, will offer you the most patient answer
Bestseller No. 14
Nakkaa FJ503 Spider Fuel Injector w/Bracket V6 Compatible with Savana Sierra Safari Express Astro...
  • Compatible with Astro 1996-2005, Blazer 1996-2005, C1500 Pickup 1996-1998, Express1500 1996-2006, Express 2500 1996-2005, K1500 Pickup1996-1998, P30...
  • Reference Part Number: FJ503, 12568332, 217-3028, FJ503, 16-9706, FJ10565, 800-1512N
  • Compatible with C1500 Pickup 1996-1998, Jimmy 1996-2002, K1500 Pickup 1996-1998, P3500 1996-1999, Safari 1996-2005, Savana 1500 1996-2006.
  • The fuel injector is a fuel delivery component that’s responsible for spraying gasoline or diesel into the combustion chambers. It’s simply a...
  • Direct replacement for the broken one and easy installation. Please confirm the part number and vehicle models before ordering.
Bestseller No. 15
Aumzong FJ503 Spider Fuel Injector Compatible with 1996-2002 Chevrolet Chevy GMC Oldsmobile 4.3l...
  • Part Number: FJ503,12568332,17113673,322-04819,217-3028,16-9706,FJ10565,8001512N,4G1887,240408,217-3252, FJ10565-11B1
  • Compatible with 4.3L V6 Engine:1996-2001 Chevrolet Astro,1996-2002 Chevrolet Blazer,1996-1998 Chevrolet C1500,1996-2002 Chevrolet Express...
  • Compatible with 4.3L V6 Engine:1996-1998 GMC C1500,1996-2001 GMC Jimmy,1996-1998 GMC K1500,1996-1999 GMC P3500,1996-2001 GMC...
  • The injector is a fuel delivery component that is responsible for injecting gasoline or diesel fuel into the combustion chamber. It is simply a...
  • Injector can effectively prevent fuel exposure, reduce fuel waste, improve fuel utilization, and minimize stickiness during use.There is a bracket in...
Bestseller No. 16
A-Premium Fuel Injector Assembly w/Bracket Compatible with Chevy, GMC Models - V6 4.3L - Silverado...
  • [Vehicle Fitment-1]: Compatible with Chevrolet Astro 1996-2005 V6 4.3L, Blazer 1996-2005 V6 4.3L, C1500 1996-1998 V6 4.3L, Express 1500 1996-2014 V6...
  • [Vehicle Fitment-2]: Compatible with GMC C1500 1996-1998 V6 4.3L, Jimmy 1996-2002 V6 4.3L, K1500 1996-1998 V6 4.3L, P3500 1996-1999 V6 4.3L, Safari...
  • [Reference Number]: The A-Premium Fuel Injector Kit's reference number: FJ503, 12568332, 19210688. Before placing an order, verify that the part is...
  • [Important Note]: It fits the model with Return fuel system, Not fits returnless fuel system; It comes with Bracket, Seal, and O-Ring
  • [Buy with Confidence]: 1 Year Unlimited-mileage Quality Guarantee---We extremely value your satisfaction and strive to provide you good shopping...
Bestseller No. 17
FJ503 Fuel Injector Compatible with Chevy Blazer S10 Express Silverado Astro GMC Jimmy 1500 C1500...
  • 【Upgrade Your Engine】XunDong FJ503 Spider Fuel Injector Assembly is designed to deliver a precise and consistent fuel spray pattern, ensuring...
  • 【Perfect Fits】Not only does our s10 fuel injector deliver superior performance, but it is also direct replacement for the OE# 12568332, FJ10565,...
  • 【Wide Compatibility】The silverado fuel injector Compatible for 4.3L Engine Chevrolet Astro 1996-2005, Express1500 1996-2006, Blazer 1996-2005, P30...
  • 【Well-made】The 4.3 spider injector is manufactured to meet or exceed OEM specifications, ensuring durability and longevity. Made from high-quality...
  • 【Satisfaction Guarantee】The express 1500 fuel injector comes with a no-worry 12-month warranty. Each product has undergone rigorous testing and...
SaleBestseller No. 18
PTNHZ Spider Fuel Injector FJ503 w/Retaining Bracket SCPI to MPFI FJ10565 217-3028 833-22102-6...
  • FIT FOR:Chevy C2500/C3500, Express 2500/3500, K1500/K2500,Suburban C2500/K1500/K2500; GMC C1500/C2500, K1500/K2500/K3500, Savana 1500/2500, Suburban...
  • REPLACE MANUFACTURER PART NUMBERS:19210688, 12568332, 88894353,17113273,FJ503, FJ10565, 217-3028, 2173028, 89060439, 833-22102-6, 25331863, 800-1512N,...
  • ADVANTAGE:Stainless steel calibration slide and spring assembly prevents corrosion within the fuel control body leading to an extended service life.
  • INCLUDED:1x Fuel Injector,1x Retaining Bracket with Bolt.
  • SUPPORT: At PTNHZ, if you have any question about our product, please contact us right away, we can handle any problems.
Bestseller No. 19
Fuel Spider Injector Assembly W/Bracket Replacement For 1996-02 GM Chevy Pickup Trucks Suburban...
  • ☑【Reference Part Numbers】89060440, 25340347, 17114163, 17115381, 2173029, 93441235, FJ10566, 4G1888, 63886, FJ105, FJ504, 16970, 238887,...
  • ☑【Fitment】1996-2000 C1500 C2500; 1996-2002 Express 1500 2500 3500; 1996-1999 K1500 K2500 K3500; 1996-1999 P30; 1996-1999 Suburban C/K 1500 2500;...
  • ☑【Feature】This Fuel Injector Kits contain the necessary parts to service a fuel injector, and are direct replacement for your vehicle's original...
  • ☑【Note】This Fuel Injector is DIFFERENT from the injector on Vortec 4.3L V6 engines and those 2 can NOT replace each other. Please do confirm...
  • ☑【Warranty】Our replacement products all come with one-year manufacturer’s free replacement warranty.
Bestseller No. 20
NEWZQ Central Fuel Spider Injector w/Bracket 4.3L V6 Compatible with Chevy Astro Blazer C1500...
  • 【Replacement Part Number】12568332, 19210688, 89060439, 17114164, 17113295, 25331863, 17113295, 17113215, 17115379, 17113673, 2204-510881,...
  • 【Compatible Car Models】Compatible with Chevy Astro 1996-2001. Compatible with Blazer 1996-2002. Compatible with C1500 1996-1998. Compatible with...
  • 【Compatible Car Models】Compatible with I-suzu Hombre 1997-2000. Compatible with I-suzu Bravada Base Sport Utility 2000-2001. Compatible with...
  • 【When to Replace】Low-quality fuel can cause carbon deposits to accumulate and clog your fuel injectors. Such as lean fuel mixture, troubles in...
  • 【Customer Satisfaction】 Providing a 100% satisfaction experience is our main priority to our customers. Feel free to message us through “contact...
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FAQ:

Q: What are the different types of ‘Spider’ fuel injectors?

A: There are two types of the ‘Spider’ fuel injector assemblies used on the GM 4.3L, 5.0L, 5.7L engines and this article will help you with both types. In case you’re wondering, one type belongs to the Central Port Injection ( CPI) system and the other to the Central Sequential Fuel Injection ( CSFI) system. How can you tell them apart?

Q: What are the symptoms of a bad Vortec Spider injectors?

A: Symptoms of Bad Vortec Spider Injectors 1 Misfire engine codes (P0400-P0406 and P0300 codes) 2 Long starting, hard cranking 3 Poor idle and running at low-rpm’s, but fine at high rpm’s

Q: What is a spider Vortec engine?

A: The L35 and LF6 Vortec engines from the mid-90’s to early 2000’s had a “central port injection” setup which is known as the “spider”. The spider system uses a central pump with 6 tubes connected to it that lead to each of the 4.3L vortec cylinders.

Q: What kind of fuel injection system does GM Vortec use?

A: Jul 1, The system was used on L V6 Vortec engines through , and was redesigned in and renamed “Central Sequential Fuel Injection”.This harness is designed to be a complete wiring system for the central multiport fuel injection system on General Motors Vortec (L) injection engines.