1999 Pontiac Grand Prix low pressure valve

BOOMERT68

MEMBER
1999 PONTIAC GRAND PRIX
6 CYL
2WD
AUTOMATIC
215,000 MILES

Do you have a picture or diagram that would show me where the low pressure valve is located on my GP?

Also, do you have a diagram of replacing the ignition switch?

Thank you,
Brandon

Tuesday, June 22nd, 2010 AT 4:20 PM

3 Replies

SATURNTECH9

MECHANIC
30,870 POSTS

Which model grand prix do you have?Do you mean the a/c low pressure switch?Also are you taking about the electrical ignition switch?

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Tuesday, June 22nd, 2010 AT 6:34 PM

BOOMERT68

MEMBER
2 POSTS

It's a 1999 pontiac grand prix SE 4 door 3.1L and yes I am looking for the low pressure valve for the a/c to refill it with freon. I have found two but want to make sure I am using the right one.

Yes I am also asking about the electrical ignition switch under the steering column. I heard that replacing that will keep my lights diming and make my a/c controls 1-4 work again.

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Wednesday, June 23rd, 2010 AT 9:56 AM

SATURNTECH9

MECHANIC
30,870 POSTS

The low side of your a/c system will have the smaller nipple of the two. As far as your ignition switch taking out your dash light's and your inside blower fan I don't know about that I would think you would loose your radio and other stuff like that. Did someone trouble shoot the switch and tell you it was bad?

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Wednesday, June 23rd, 2010 AT 8:43 PM