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If it's like a 92 bird, then the 3 main vacuum lines are located between the Air Filter hose and the throttle body. There is a little Plenum that has the IDLE Air Control motor on one end and a rubber connector coming out of the side of it with 3 rubber hoses in it. any other vacuum hose lines from there are located under the big intake plenum (the big aluminum cover in the middle that has "3.1 Liter V6" written on it.
What else can I help you with?
Wiring order for a 1991 Pontiac SunBird ignition module?
what is the color order of the wires to a Pontiac Sunbird ignition module
What type of oil for a 1991 Pontiac Sunbird?
5W30
Does a 1991 Pontiac sunbird have a timing belt?
yes
Where is the fuse box on a 1991 Pontiac Sunbird?
Under the Dashboard on the Drivers Side.
Where is the PCV valve located on a 1991 Pontiac Sunbird V6?
on the valve cover
How do you open a locked car door on a 1991 Pontiac Sunbird LE?
Using a key
Where is the voltage regulator located on a 1991 Pontiac sunbird?
8Where is voltage regulator located
What is the firing order for a 1991 Pontiac Sunbird 4 cylinder?
1 3 4 2
What is the firing order for a 1991 Pontiac Sunbird?
for a 4 cylinder it is 1-3-4-2
Where is the thermostat on a 1991 Pontiac Sunbird LE?
The thermostat is in the radiator. Open the radiator lid and pull the thermostat out.
How do you turn off the engine light on a 1991 Pontiac sunbird Le?
u will need a odb1 scanner,
What size speakers are in a 1991 Pontiac sunbird?
crutchfield is a great source for this type of info. They are an electronics store. Google it
