2003 GMC Topkick A/C Control Units
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- Dorman®HVAC Control ModuleGMC Topkick without Rear Window Defogger 2003, HVAC Control Module by Dorman®. Affordable, a proper fit, and optimal performance - HVAC control module offers all this and more. A direct replacement, climate control module will blend in...100% replacement of backlight bulbsHigh-quality replacement and renewed parts ensure long-lasting service$145.42 - $221.55