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    2003 Pontiac Grand Am 3.4L SFI 6cyl

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    GM Century/Lumina/Grand Prix/Intrigue 1997-2000

    VACUUM DIAGRAMS

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    Following are vacuum diagrams for most of the engine and emissions package combinations covered by this guide. Because vacuum circuits will vary based on various engine and vehicle options, always refer first to the underhood Vehicle Emission Control Information (VECI) label, if present. Should the label be missing, or should the vehicle be equipped with a different engine from the vehicle's original equipment, refer to the following diagrams for the same or similar configuration.

    If you wish to obtain a replacement emissions label, most manufacturers make the labels available for purchase. The labels can usually be ordered from a local dealer.



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    Fig. 1997-99 Chevrolet & Buick with 3.1L (VIN M) engine



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    Fig. 1997 Oldsmobile and 1997-99 Pontiac with 3.1L (VIN M) engine



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    Fig. 1997 Buick and Pontiac with 3.4L (VIN X) engine



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    Fig. 1997 Chevrolet with 3.4L (VIN X) engine



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    Fig. 1997 Buick with 3.8L (VIN K) engine



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    Fig. 1997 Buick and Pontiac with 3.8L (VIN 1) engine



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    Fig. 1998-00 Buick and Pontiac with 3.8L (VIN 1) engine



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    Fig. 1998-99 Pontiac and Oldsmobile with 3.8L (VIN K) engine



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    Fig. 1999 Oldsmobile with 3.5L (VIN H) engine



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    Fig. 2000 Buick, Chevrolet and Pontiac with 3.1L (VIN M) & 3.4L (VIN E) engines



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    Fig. 2000 Oldsmobile with 3.5L (VIN H) engine-with Secondary A.I.R. System



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    Fig. 2000 Oldsmobile with 3.5L (VIN H) engine-without Secondary A.I.R. System



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    Fig. 2000 Buick, Chevrolet, Pontiac and Oldsmobile with 3.8L (VIN K) engine

     
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