Titan Fuel Tanks 01-04 GM 2500 LB7 Adaption Kit w/ 2 Heavy Gauge Metal Flanges/1 O-RingRequired on all 2001 to 2003 General Motors trucks. On 2004 models it is required if the eighth character in the VIN is a "1". Kit needed for GM trucks with LB7 engines, years 2001 to 2003 and some 2004Freight on the LB7 Kit is free when ordered with a tank. If not ordered with the tank, a $70. 00 over night express (Fed Ex) freight charge will apply. This Part Fits: Year Make Model Submodel 2001 2004 Chevrolet Silverado 2500 HD Base 2001 2004