Quote Originally Posted by migtek02 View Post
do you know what years the flex fuel rails are used on?

Flex fuel on the full size trucks dates back to 2002.

Here's a list of Flex Fuel applications.


The only E85 compatible vehicles produced by General Motors are:

• 2000-2002 S-Series pickups with 2.2L (VIN 5- RPO L43)

• 2002-2005 full-size pickups and utilities with 5.3L (VIN Z -- L59)

• 2006 Chevrolet Avalanche, Silverado, Suburban, Tahoe with 5.3L (VIN Z -- RPO L59)

• 2006 Chevrolet Impala, Monte Carlo with 3.5L (VIN K -- RPO LZE)

• 2006 GMC Sierra, Yukon, Yukon XL with 5.3L (VIN Z -- RPO L59)

• 2007 Chevrolet Express with 5.3L (VIN Z -- RPO L59)

• 2007 Chevrolet Avalanche, Silverado, Suburban, Tahoe with 5.3L (VINs 0, 3 -- RPOs LMG, LC9)

• 2007 GMC Savana with 5.3L (VIN Z -- RPO L59)

• 2007 GMC Sierra, Yukon, Yukon XL with 5.3L (VINs 0, 3 -- RPOs LMG, LC9)

• 2007 Chevrolet Impala, Monte Carlo with 3.5L (VIN K -- RPO LZE)

• 2007 Saturn Relay, Buick Terraza, Chevrolet Uplander, Pontiac Montana SV6 (Canada Only) with 3.9L (VIN W -- RPO LGD)

• 2008 Chevrolet Impala with 3.5L (VIN K -- RPO LZE) and 3.9L (VIN 1- RPO LZG)

• 2008 Pontiac Montana SV6, Chevrolet Uplander 3.9L (VIN W -- RPO LGD)

• 2008 Chevrolet Express, GMC Savana with 5.3L (VIN 4 -- RPO LMF)

• 2008 Chevrolet Avalanche, Suburban, Silverado, GMC Yukon, Sierra with 5.3L (VIN 3 -- RPO LC9)

• 2008 Chevrolet Avalanche, Suburban, Silverado, Tahoe, GMC Yukon, Yukon XL, Sierra with 5.3L (VIN 0 -- RPO LMG)