Fuel Injector and Oil Ring Seal Replacement
November 19, 2014

If Service Information diagnostics indicates a fuel injector may need to be removed for a repair or replaced, such as for a fuel odor or extended cranking condition, on a 2014-2015 Corvette, Silverado, Suburban, Tahoe, Sierra, Yukon, or Yukon XL equipped with the 4.3L engine (RPO LV3), 5.3L engine (RPO L83) or 6.2 engine (RPOs L86, LT1, LT4), be sure a new O-ring seal is installed.

TIP:
If an injector is being replaced, all the injectors should be installed with new seals.

2014 "LT-1" 6.2L V-8 VVT DI Direct Injection Fuel System

The following fuel injector part numbers require a new O ring before installation. Use the O-ring seal listed below.

RPOs LV1-LV3-L83-L86-LT1 Seal Kit (PN 12668553) should be used for the following injector kits:

LV1-LV3-L83 Service Injector:

• 12656932 (Nominal Flow)

LT1/L86 Service Injectors:

• 12656931 – Nominal Flow

• 12660002 – Low Flow

• 12660003 – High Flow

RPO LT4 Seal Kit (PN 12668554) should be used for the following injector kits:

LT4 Service Injectors:

• 12661029 – Nominal Flow

• 12661030 – Low Flow

• 12661031 – High Flow