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Re: Upgrade to Digital Climate Control - 99' Grand Prix
I did a quick (not thorough) comparison of the manual vs. automatic climate control schematics in my 98 shop manual. Replacing the manual control with automatic control is probably possible, but I wouldn't do it without a very good reason. The automatic system has additional sensors (inside air temp, ambient outside air temp, sun load) not present with the manual. The automatic has a right-hand electric actuator (for blend door) not present with manual. The PCM connections appear to be the same, so I doubt the PCM would need to be reprogrammed.
If want to pursue this change, get the schematics and figure out how to install or spoof the missing sensors. Also, figure out how the controls will work with the manual air flow setup (blend doors) vs. the dual-zone setup for the automatic. May not be an issue by using only the driver side controls.
Good luck.
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Lloyd
18 Charger ScatPack 392
18 Lincoln Navigator L (Hers)
98 Grand Prix GTP Sedan (RIP)
99 Grand Prix GTP Coupe (to the moon)
05 Wrangler Unlimited (Junior's)
03 Explorer XLT (Sissy's)
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