Pontiac Grand Prix Help and Advice

Look through some of our Grand Prix repair questions and answers. There may be some auto repair answers you were looking for that are related to your problem. Check engine light, misfire, air conditioning, tire pressure monitor system, ABS, transmission and more.


Question: My 1998 Pontiac Grand Prix GTP's CJ2 Digital Heater - A/C Control is putting out only 0.03 volts at pin C11 when the CJ2 connector is back probed and the defroster is set to high. I have performed the air conditioning diagnostics ("Blower Motor Inoperative at Any Speed," pages. 1-186 and 1-187) several times always reaching the final step, # 29, which is to replace the Heater - A/C Control.

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