[Image of vacuum line diagram]
Legend
* A: Intake manifold
* B: Throttle body
* C: EGR valve
* D: Distributor
* E: Fuel pressure regulator
* F: Power brake booster
* G: Transmission modulator
* H: Charcoal canister
* I: PCV valve
* J: A/C compressor
* K: Evap purge solenoid
* L: Fuel injector
* M: O2 sensor
Notes
* The diagram is for a 1991 GMC Vandura 1500 with a 6-cylinder engine.
* The diagram may vary slightly depending on the specific model and year of your vehicle.
* If you have any questions about how to replace a vacuum line, please consult a qualified mechanic.
