Question 1

How to replace the fuel injectors in the LLT (3.6L) engine on GMC Acadia?

Accepted Answer

The first step to replace llt (3.6L) fuel injectors requires the use of ch-48027 or does not need ch-48027 to relieve high side fuel system pressure. Record down the alignment spots of each injector before removing them for future installation. The Fuel Rail assembly for bank 1 or bank 2 needs removal from the system. The three Fuel Injector retaining rings must be discarded before disconnecting the electrical connector and extracting the direct fuel injectors together with their harness as an assembly. A j 2619-01 slide hammer with j-37281-a injector remover should be used for even injector extraction when required. The upper o-ring seal and plastic spacer and retaining ring and isolator cup along with teflon seal must be discarded from each Fuel Injector. When bores show signs of contamination you should clean them using the j-39313 adapter together with en-47909 cleaning kit. Place a new o-ring seal in gm p/n 12345610 silicon-free engine oil equivalent before installing the new upper o-ring seal combined with plastic spacer followed by retaining ring then isolator cup and teflon seal onto the fuel injectors. Magnet the en-48266-1 part from the en-48266 installer toward the injector tip without teflon seal lubrication followed by seal installation onto the en-48266-1 which should be drawn into the injector groove. The en-48266-2 deviates from the en-48266-1 so workers must mount it on the injector tip while using moderate hand pressure to stretch the teflon seal. Lay the direct fuel injectors and their harnesses as one unit after taking away the en-48266-2 while reattaching the electrical connector with injector positioning similar to removal procedures. Reinstall the fuel injection Fuel Rail assembly which belongs to bank 1 or bank 2.

Question 2

How to replace the fuel injectors on GMC Sierra 1500?

Accepted Answer

The air cleaner outlet duct must be removed carefully before the replacement can start. Begin the fuel system pressure relief operation with ch-48027 or perform it without the tool then remove the engine wiring harness bracket nut. Next disconnect the electrical connectors from the evap purge solenoid, generator, map sensor, ignition coil main electrical connector and the fuel injectors. First mark each connector for later assembly before you move the cpa retainer with one click and press the tab to disconnect the Fuel Injector electrical connectors. Above the electronic throttle control device and Fuel Injector suite disconnect the electrical connectors while using the standard marking procedures. Uninstall those engine wiring harness clips which support the generator battery jumper cable and ignition coil bracket stud . Remove negative battery cable stud and terminals (2 and 3) from the Cylinder Head. First disconnect the wiring harness clip bolt from the generator bracket then place the harness aside while also removing the chassis fuel feed pipe quick connect fitting from the Fuel Rail. Lift out the evap purge solenoid from its position on the Fuel Rail by removing the bolts after unhitching evap tube fasteners at both the intake manifold and evap purge solenoid. Detach the Fuel Rail assembly while taking care not to harm either the injector electrical connector terminals or spray tips and apply caps over each fitting to stop any contamination. Evacuate all injectors from their bores while lifting the Fuel Rail in an even manner after cleaning it as needed. The installation of fuel injectors requires removing their retainers in combination with injectors and discarding the o-ring seals that sit at positions 2 and 4. First clean the engine oil to lubricate the new o-ring seals before attaching them to the injectors and installing the injectors into the Fuel Rail with retainers in place. After applying lubrication to the lower o-ring seals install the Fuel Rail onto the intake manifold while applying firm downward pressure until it reaches a complete position. First tighten 10 nm (89 lb in) Fuel Rail bolts before reinstalling the evap tube along with purge solenoid and making quick connect fittings to the evap canister and intake manifold. First reattach the Fuel Rail to the chassis feed pipe. After that, install the pcv hose before gathering all engine wiring harnesses over the engine. Take the generator bracket as the installation site for the wiring harness clip while tightening its clip bolt to 9 nm (80 lb in). Reinstall the negative battery cable stud on the right Cylinder Head unit while fastening it with 25 nm torque setting (18 lb ft). One should first reconnect the ignition coil main electrical connector then install the cpa retainer. Seed the electronic throttle control and Fuel Injector electrical connectors before tightening the cpa retainer. Fasten the engine wiring harness bracket nut with 5 nm (44 lb in) torque. After that, connect the MAP Sensor , generator and evap purge solenoid connectors followed by engine harness bracket assembly. Turn the ignition to on then off starting with two seconds of on time followed by ten seconds of off time before repeating the on step to check for any fluid leakage. Inspect for any leaks. Reinstall the air cleaner outlet duct at the end of the installation procedure.

OEM GMC Fuel Injector

102 Fuel Injectors found

GMC Injector Part Number: 19244616

GMC Injector Part Number: 12580426

GMC Injector Part Number: 12633789

GMC Injector Part Number: 12662564

GMC Injector Part Number: 12608362

GMC Injector Part Number: 12671568

GMC Injector Part Number: 19210900

GMC Injector Part Number: 19244615

GMC Injector Part Number: 23437819

GMC Injector Part Number: 17111928

GMC Injector Part Number: 12732623

GMC Injector Part Number: 12663380

GMC Injector Part Number: 19110532

GMC Injector Part Number: 12733960

GMC Injector Part Number: 55513509

GMC Injector Part Number: 12702932

GMC Injector Part Number: 17112249

GMC Injector Part Number: 17111929

GMC Injector Part Number: 88894353

GMC Injector Part Number: 19420033

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