Parts that are *likely* interchangeable:
* Some engine parts: If both trucks have the same engine (e.g., a 5.7L Vortec), many internal engine parts might be compatible. However, always double-check part numbers.
* Certain electrical components: Some basic wiring harnesses, bulbs, and switches *might* be interchangeable, but this isn't guaranteed.
* Certain suspension components: Some suspension bushings, shocks, and maybe even some springs *might* be interchangeable, but it's not a sure thing. Again, part numbers must be carefully verified.
Parts that are *unlikely* interchangeable:
* Body parts: Body panels, bumpers, fenders, etc., are almost certainly not interchangeable. The body styles are quite different.
* Interior parts: Dashboards, door panels, seats, etc., will likely not fit.
* Major drivetrain components: Transmissions, transfer cases, and differentials are almost certainly different and incompatible.
* Computer modules (ECMs): These are completely different and won't be compatible.
Crucial advice: Before buying any used parts, always verify the part number with a reputable parts supplier or online database (like AutoZone, Advance Auto Parts, or RockAuto) to ensure compatibility. Relying on year alone is insufficient; you MUST compare part numbers.
