Are 5.3L Truck throttle bodies the same as 5.7L TBs

[socmninja]

are the TBs interchangeable?

[35thAnniZ28]

pretty sure its interchangeable....have you seen the intake manifold on the 5.3? dispicable

[Anthracis]

80mm LQ4 Cable actuated TB is a direct bolt on to the LS1. I think they are off 97-98 GMC trucks. Junkyard should be able to sell you one fairly inexpensive.