Where is low pressure switch on Pontiac grand prix?

The location of the low pressure switch on a Pontiac Grand Prix varies depending on the year and engine. There isn't one single, universally applicable answer. It's often part of the AC system and may be located near the compressor or on the accumulator/receiver-dryer.

To find it, you'll need to:

1. Consult your vehicle's repair manual: This is the most reliable source. The manual will show diagrams and pinpoint the location of the low-pressure switch specific to your Grand Prix's year and engine.

2. Search online forums: Websites and forums dedicated to Pontiac Grand Prix owners (like Grand Prix forums) can be helpful. Search for your specific year and model, along with "low pressure switch location." Users might have posted pictures or descriptions of its location.

3. Use a parts diagram: Many online auto parts stores (like AutoZone, Advance Auto Parts, etc.) allow you to look up parts diagrams for your vehicle. Finding the AC compressor or accumulator/receiver-dryer in the diagram will likely show the low pressure switch connected to it.

Caution: Working on the AC system involves refrigerant handling which requires special tools and knowledge to avoid injury and environmental damage. If you're not comfortable working with refrigerant, it's best to take your vehicle to a qualified mechanic.