No, the fuel injectors from a 2004 Chevy 4.3L engine will not directly fit a 1996 Pontiac Firebird 3.4L engine. The fuel injectors are designed specifically for each engine model and have different specifications, including flow rates, electrical connectors, and physical dimensions.
I attached the part numbers for both below.
Let me know if this helps or if I can help in any way.
Images (Click to enlarge)
Thursday, May 25th, 2023 AT 9:31 PM