For instance speeds 1 and 2 dont work but 3,4, and 5 do.
2007-02-18 06:20:55 · 5 answers · asked by ermcdon6 1 in Cars & Transportation ➔ Car Makes ➔ GMC
I have already replaced the A/C control unit
2007-02-18 12:16:59 · update #1
This is usually a faulty resistor board that routes the voltage through it down from the control head. The board is located behind the blower motor under the dash. To check it is simply a matter of checking for the voltage inputs from different switch positions and check the ouputs to the blower motor. These are not too difficult to replace, but not much room to do it. Good luck.
2007-02-19 08:39:25 · answer #1 · answered by Deano 7 · 0⤊ 0⤋
I actually have an un-modded 2004 Grand Prix GT. the different evening the street wasn't busy and in truth sparkling. i wanting to gun it and attempt for myself what the right % of the vehicle grow to be. i grow to be waiting to hit about 107-109 at the same time as the engine flat lined and my % does no longer enhance any more beneficial. I nonetheless have some more beneficial runs to have at in the previous I thoroughly stick through this yet that is what I hit at the same time as i tried at it.
2016-12-04 08:21:03 · answer #2 · answered by Anonymous · 0⤊ 0⤋
More than likely it is your A/C head unit that is going bad. You may need to bring it in to have tested. Or if you know someone with the same year car as you take theres and try it. If that is not it More than likely the blower motor.
2007-02-18 06:58:29 · answer #3 · answered by scott b 2 · 0⤊ 0⤋
No.1 & 2 blower speed resistors are probably burnt out.
2007-02-18 06:24:27 · answer #4 · answered by gdwrnch40 6 · 0⤊ 0⤋
need to replace the blower motor switch
2007-02-18 06:24:13 · answer #5 · answered by Mickirs 3 · 0⤊ 0⤋