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  • Merchant 2001-2004 GMC LB7 Heavy Duty Injector Return Line Bolts at the Injector - MA10491

Merchant 2001-2004 GMC LB7 Heavy Duty Injector Return Line Bolts at the Injector - MA10491

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SKU: MAT-10491


Duramax Heavy Duty Injector Return Line Bolt
With the shallow head on the stock fuel injector return line bolt, it is common for the head to round out during removal or installation. This MA Heavy Duty Duramax Fuel Injector Return Line Bolt has been redesigned to allow nearly double the tool engagement. 


Proper engagement of the Allen wrench in the return line bolt head is crucial for accurate torque during reassembly to avoid a fuel leak at the return line fitting. The unique head shape found on LB7 injector return line bolts offers the needed strength while maintaining proper clearance on other engine components.


It is very common for the heads of these bolts to become rounded during the removal of the bolt.  If the socket does not fit in the bolt properly, it can not be tightened properly and this could lead to a leak, putting fuel in the oil.  Replace this bolt if damaged to avoid expensive problems or to avoid future potential problems later down the road.



  • Direct Replacement
  • Great For Replacing Rounded Off Bolt
  • Easy Install


  • Heavy Duty Construction
  • Nearly Double The Tool Engagement
  • Helps To Avoid Expensive Repairs

What's In The Box

  • 1 - Heavy Duty Injector Return Line Bolt


2001_Chevrolet_Silverado 2500 HD_6.6L DIESEL, 2001_Chevrolet_Silverado 3500_6.6L DIESEL, 2001_GMC_Sierra 2500 HD_6.6L DIESEL, 2001_GMC_Sierra 3500_6.6L DIESEL, 2002_Chevrolet_Silverado 2500 HD_6.6L DIESEL, 2002_Chevrolet_Silverado 3500_6.6L DIESEL, 2002_GMC_Sierra 2500 HD_6.6L DIESEL, 2002_GMC_Sierra 3500_6.6L DIESEL, 2003_Chevrolet_Silverado 2500 HD_6.6L DIESEL, 2003_Chevrolet_Silverado 3500_6.6L DIESEL, 2003_GMC_Sierra 2500 HD_6.6L DIESEL, 2003_GMC_Sierra 3500_6.6L DIESEL, 2004_Chevrolet_Silverado 2500 HD_6.6L DIESEL, 2004_Chevrolet_Silverado 3500_6.6L DIESEL, 2004_GMC_Sierra 2500 HD_6.6L DIESEL, 2004_GMC_Sierra 3500_6.6L DIESEL

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