NOS GM Vacuum Manifold Block – Part #25530734
type: Unknown Type
Vendor: CorvairFarmer
Description:
GM part number 25530734 is a 4-port vacuum manifold block used on 1988–1993 Buick, Pontiac, and Oldsmobile vehicles equipped with the LN3 3.8L V6 engine.
GM Vacuum Manifold Block Specification Chart — Part #25530734
| Attribute | Value |
|---|---|
| GM Part Number | 25530734 |
| Description | Manifold, Intake Manifold Vacuum (4-Port Block) |
| Function | Distributes vacuum from throttle body to multiple systems |
| Material | Molded plastic |
| Color | Black |
| Dimensions | 3.0" × 2.1" × 1.2" |
| Weight | 0.40 lbs |
| Condition | NOS (New Old Stock) |
| Packaging | GM-labeled bag with inventory barcode and adjustment label |
| Group Number | 03.675 |
| Discontinued | Yes — U.S. market since Jan 1, 2012 |
| Warranty | GM-backed 12-month factory warranty |
🚗 Confirmed Fitment Applications
This vacuum block fits GM vehicles equipped with the LN3 3.8L V6 engine:
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Confirmed Fitment (LN3 3.8L V6 & 3.3L V6 Families)
Buick
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1988–1993 LeSabre (3.8L)
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1988–1993 Park Avenue (3.8L)
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1988–1993 Regal (3.8L)
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1989–1993 Century (3.3L)
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1992 Skylark (3.3L)
Pontiac
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1988–1993 Bonneville (3.8L)
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1992 Grand Am (3.3L)
Oldsmobile
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1988–1993 Eighty‑Eight (3.8L)
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1988–1993 Ninety‑Eight (3.8L)
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1988–1993 Delta 88 (3.8L)
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1989–1993 Cutlass (3.3L)
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1992 Achieva (3.3L)
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Used to route vacuum to systems like EGR, HVAC controls, fuel pressure regulator, and cruise control.
LOCATION - UPSTAIRS BOTTOM SHELF BELOW FRANKS
