GMT800 Cab Swap: 2002 → 2003 1500 Ext Cab, Rust Control & Questions

SilveradoPhil

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Starting a thread about moving the complete 2003 dash and HVAC/heater system into a rust‑free 2002 GMT800 cab. I'm swapping everything over — dash, harness, HVAC box, blower, and controls — and want to know what differences to expect between the 02 and 03 setups, wiring, and mounting points. Any advice from people who've done this swap is appreciated. More questions forthcoming. Thank You
 

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