Hi Michael, maybe this will help-ACDelco online- [...]2/internet/[...]?selectedfld=&application=Car%2FLight+Duty+Truck&year=2004&make=CHEVROLET&model=SILVERADO+2500+HD&engine=V8+6.0L+364cid+GAS+FI+N+Engine+VIN+%3D+U++++++&productline=18&part=2536 Login to read more.