How can you detect and fix a vacuum leak at the bottom of the throttle body?

The TBI throttle body is attached to the top of the intake manifold by two bolts. They can sometimes work loose from vibration and temperature changes during normal engine operation, causing a vacuum leak. If you suspect a vacuum leak at the bottom of the throttle body, use a rubber hose as a stethoscope. Start the engine and place one end of the hose next to your ear as you probe around the base of the throttle body with the other end. You will hear a hissing sound if a leak exists, but be careful of hot and moving engine components. Remove the air cleaner assembly. Locate the throttle body mounting bolts. Determine if any special tools or adapters will be necessary to tighten them. Tighten the bolts securely and evenly. Do not overtighten them, as the manifold threads could strip. If, after properly tightening the bolts, a vacuum leak still exists, the throttle body must be removed and a new gasket installed. After tightening the fasteners, reinstall the air cleaner and return all hoses to their original positions.

Genuine Pontiac Grand Prix Throttle Body

Fuel Injection Throttle Body

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18 Throttle Bodies found

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Pontiac Grand Prix Fuel Injection Air Meter Body (W/Throttle Actuator)
Part Number: 12631016
$127.14 MSRP: $369.18
You Save: $242.04 (66%)
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Product Specifications
- Other Name: Body,Throttle(W/Throttle Actuator); Throttle Body
- Replaced by: 12694877
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2008 Pontiac Grand Prix | 4 DOOR, GXP 4 DOOR | 8 Cyl 5.3L
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Pontiac Grand Prix Throttle Body Assembly
Part Number: 24507235
$432.31 MSRP: $786.02
You Save: $353.71 (45%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Body Assembly, Throttle ; Body, Fuel Injection Air Meter; Throttle Body, Throttle Body Kit
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1999-2000 Pontiac Grand Prix | GT 2 DOOR, GT 4 DOOR, GTP 2 DOOR, GTP 4 DOOR, SE 4 DOOR | 6 Cyl 3.8L
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Pontiac Grand Prix Fuel Injection Air Meter Body (W/Throttle Actuator)
Part Number: 12568580
$357.78 MSRP: $644.64
You Save: $286.86 (45%)
Product Specifications
- Other Name: Body,Throttle(W/Throttle Actuator); Throttle Body
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2005-2007 Pontiac Grand Prix | 4 DOOR, GT 4 DOOR, GT2 4 DOOR, GTP 4 DOOR, GXP 4 DOOR | 8 Cyl 5.3L
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Pontiac Grand Prix Throttle Body Assembly (W/ Throttle Actuator)
Part Number: 12607894
Product Specifications
- Other Name: Body Assembly, Throttle (W/ Throttle Actuator) ; Body, Fuel Injection Air Meter; Throttle Body
- Replaced by: 19420718
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2005-2008 Pontiac Grand Prix | 4 DOOR, GT 4 DOOR, GT2 4 DOOR, GTP 4 DOOR, GXP 4 DOOR | 6 Cyl 3.8L
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Pontiac Grand Prix Throttle Body
Part Number: 17096139
Product Specifications
- Other Name: Body, Trot; Throttle Body Kit
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1996 Pontiac Grand Prix | 2 DOOR, 4 DOOR, GT 2 DOOR, SE 2 DOOR, SE 4 DOOR | 6 Cyl 3.4L
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Pontiac Grand Prix Multi, Portion Fuel Injector Throttle Body Assembly
Part Number: 17089085
Product Specifications
- Other Name: Body Assembly, Multi, Portion Fuel Injector Throttle ; Body, Trot
- Replaces: 17113059
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1989-1990 Pontiac Grand Prix | 2 DOOR, 4 DOOR, LE 2 DOOR, SE 2 DOOR, STE 4 DOOR | 6 Cyl 3.1L
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Pontiac Grand Prix Fuel Injection Air Meter Body
Part Number: 17113688
Product Specifications
- Other Name: Body Asm,Throttle ; Body, Fuel Injection Air Meter; Throttle Body
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2001-2003 Pontiac Grand Prix | SE 4 DOOR | 6 Cyl 3.1L
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Pontiac Grand Prix Fuel Injection Air Meter Body
Part Number: 17113629
Product Specifications
- Other Name: Body Asm,Throttle ; Body, Fuel Injection Air Meter; Throttle Body, Throttle Body Kit
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2000 Pontiac Grand Prix | SE 4 DOOR | 6 Cyl 3.1L
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Pontiac Grand Prix Multi, Portion Fuel Injector Throttle Body Assembly
Part Number: 17089084
Product Specifications
- Other Name: Body Assembly, Multi, Portion Fuel Injector Throttle ; Trot, Injc; Throttle Body Kit
- Replaces: 17112765, 17112144, 17113058
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1988-1990 Pontiac Grand Prix | 2 DOOR, 4 DOOR, LE 2 DOOR, SE 2 DOOR, STE 4 DOOR | 6 Cyl 2.8L, 6 Cyl 3.1L
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Pontiac Grand Prix Throttle Body
Part Number: 17096152
Product Specifications
- Other Name: Body,Throttle ; Body, Trot; Throttle Body Kit
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1996-1998 Pontiac Grand Prix | 2 DOOR, 4 DOOR, GT 2 DOOR, GT 4 DOOR, SE 2 DOOR, SE 4 DOOR | 6 Cyl 3.1L
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Pontiac Grand Prix Throttle Body Assembly
Part Number: 17094010
Product Specifications
- Other Name: Body Assembly, Throttle; Throttle Body, Throttle Body Kit
- Replaces: 17113118
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1994-1995 Pontiac Grand Prix | 2 DOOR, 4 DOOR, GT 2 DOOR, SE 2 DOOR, SE 4 DOOR | 6 Cyl 3.1L
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Pontiac Grand Prix Throttle Body Assembly
Part Number: 17090129
Product Specifications
- Other Name: Body Assembly, Throttle ; Body, Fuel Injection Air Meter
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1990-1991 Pontiac Grand Prix | 2 DOOR, 4 DOOR, GT 2 DOOR, LE 2 DOOR, SE 2 DOOR, SE 4 DOOR, STE 4 DOOR | 4 Cyl 2.3L
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Pontiac Grand Prix Throttle Body Assembly
Part Number: 17113576
Product Specifications
- Other Name: Body Asm,Throttle; Throttle Body, Throttle Body Kit
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1999 Pontiac Grand Prix | GT 2 DOOR, GT 4 DOOR, GTP 2 DOOR, GTP 4 DOOR, SE 4 DOOR | 6 Cyl 3.1L
View related parts
Pontiac Grand Prix Throttle Body Assembly
Part Number: 24507227
Product Specifications
- Other Name: Body Assembly, Throttle ; Body, Fuel Injection Air Meter; Throttle Body
- Replaces: 24507237
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2001-2003 Pontiac Grand Prix | GT 2 DOOR, GT 4 DOOR, GTP 2 DOOR, GTP 4 DOOR, SE 4 DOOR | 6 Cyl 3.8L
View related parts
Pontiac Grand Prix Fuel Injection Air Meter Body
Part Number: 24503395
Product Specifications
- Other Name: Throttle Body ; Body, Fuel Injection Air Meter; Throttle Body
- Replaces: 24503394
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1997-1998 Pontiac Grand Prix | 2 DOOR, 4 DOOR, GT 2 DOOR, GT 4 DOOR, SE 4 DOOR | 6 Cyl 3.8L
View related parts
Pontiac Grand Prix Throttle Body Assembly
Part Number: 24507241
Product Specifications
- Other Name: Body Assembly, Throttle ; Body, Fuel Injection Air Meter; Throttle Body
- Replaces: 24503396
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1999-2003 Pontiac Grand Prix | GT 2 DOOR, GT 4 DOOR, GTP 2 DOOR, GTP 4 DOOR, SE 4 DOOR | 6 Cyl 3.8L
View related parts
Pontiac Grand Prix Throttle Body Assembly
Part Number: 24507230
Product Specifications
- Other Name: Body Assembly, Throttle ; Body, Fuel Injection Air Meter; Throttle Body, Throttle Body Kit
- Replaces: 24502190, 24503390
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1997-1998 Pontiac Grand Prix | 2 DOOR, 4 DOOR, GT 2 DOOR, GT 4 DOOR, SE 4 DOOR | 6 Cyl 3.8L
View related parts
Pontiac Grand Prix Throttle Body Assembly
Part Number: 17092193
Product Specifications
- Other Name: Body Assembly, Throttle
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1993 Pontiac Grand Prix | 2 DOOR, 4 DOOR, GT 2 DOOR, LE 4 DOOR, SE 2 DOOR, SE 4 DOOR, STE 4 DOOR | 6 Cyl 3.1L

Pontiac Grand Prix Throttle Body Parts Questions & Experts Answers

Throttle Body Assembly
24507235
Q: How can you detect and fix a vacuum leak at the bottom of the throttle body?
A: The TBI throttle body is attached to the top of the intake manifold by two bolts. They can sometimes work loose from vibration and temperature changes during normal engine operation, causing a vacuum leak. If you suspect a vacuum leak at the bottom of the throttle body, use a rubber hose as a stethoscope. Start the engine and place one end of the hose next to your ear as you probe around the base of the throttle body with the other end. You will hear a hissing sound if a leak exists, but be careful of hot and moving engine components. Remove the air cleaner assembly. Locate the throttle body mounting bolts. Determine if any special tools or adapters will be necessary to tighten them. Tighten the bolts securely and evenly. Do not overtighten them, as the manifold threads could strip. If, after properly tightening the bolts, a vacuum leak still exists, the throttle body must be removed and a new gasket installed. After tightening the fasteners, reinstall the air cleaner and return all hoses to their original positions.

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