Throttle Body Assembly Replacement Air Inlet Screen

1. Disconnect the IAT sensor electrical connector.
2. Remove the air intake tube (1).



3. Remove the snap ring.
4. Remove the throttle body air inlet screen (2).

1. Install the throttle body air inlet screen (2).
2. Install the snap ring.



3. Install the air intake tube (1).

Tighten
Tighten the air intake tube clamp to 1.4 N·m (12 in lb)

4. Re-connect the IAT sensor electrical connector.

Throttle Body Assembly Replacement Replacement VIN K

1. Drain the radiator coolant.
2. Remove the air intake tube (1).



3. Remove the fuel injection sight shield.
4. Remove the IAC valve, TP sensor, and MAF sensor, electrical connectors.
5. Remove the accelerator control and cruise control cables from the throttle body lever and bracket.
6. Remove the electrical harness retainer clip from the accelerator control cable bracket.
7. Remove the vacuum lines from the throttle body noting location.



8. Remove the throttle body support bracket (VIN K only).



9. Remove the nuts and bolts holding the throttle body to the intake manifold using a wrench on the manifold side of the inserts to prevent the inserts from rotating in the manifold casting.

Notice: Do not use solvent of any type when cleaning the gasket surfaces on the intake manifold and the throttle body assembly, as damage to the gasket surfaces and throttle body assembly may result.

Use care in cleaning the gasket surfaces on the intake manifold and the throttle body assembly, as sharp tools may damage the gasket surfaces.
10. Clean the gasket surface on the intake manifold and the throttle body assembly.

Remove the throttle body assembly.

1. Install the new gasket, and new inserts and studs if necessary.
2. Install the throttle body assembly.
3. Install the throttle body retaining nuts and bolts.

Tighten
Tighten the throttle body retaining nuts and bolts to 10 N·m (7 lb ft).

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.




4. Install the throttle body support bracket.

Tighten
Tighten the throttle body bolts to 11 N·m (8 lb ft).




5. Install the accelerator control and cruise control cables to accelerator cable bracket at throttle body.




Important: The throttle should operate freely without binding between full closed and wide open throttle. Refer to Accelerator Controls .

6. Install the accelerator control and cruise control cables to the throttle body lever.
7. Check for complete throttle opening and closing positions by operating the accelerator pedal. Also check for poor carpet fit under the accelerator pedal.
8. Install the electrical harness retainer clip and harness to the accelerator control cable bracket.
9. Install the vacuum lines to throttle body as noted on removal.



10. Install the air intake tube (1).
11. Refill the radiator to replace the lost coolant.
12. Install the fuel injection sight shield.

Throttle Body Assembly Replacement Replacement VIN 1

1. Remove the fuel injection sight shield.
2. Drain the radiator coolant.



3. Remove the air intake tube (1).



4. Remove the IAC valve, TP sensor, and MAF sensor, (3) electrical connectors.
5. Remove the vacuum lines (1) from the throttle body (2) noting location.



6. Remove the accelerator control (3) and cruise control cables (1) from the throttle body lever and bracket.
7. Remove the electrical harness retainer clip from the accelerator control cable bracket (4) if necessary.
8. Remove the accelerator control cable bracket, if replacing throttle body.



9. Remove the nuts and bolts holding the throttle body to the intake manifold using a wrench on the manifold side of the inserts to prevent the inserts from rotating in the manifold casting.
10. Remove the throttle body assembly.

Notice: Do not use solvent of any type when cleaning the gasket surfaces on the intake manifold and the throttle body assembly, as damage to the gasket surfaces and throttle body assembly may result.

Use care in cleaning the gasket surfaces on the intake manifold and the throttle body assembly, as sharp tools may damage the gasket surfaces.
11. Clean the gasket surface on the intake manifold and the throttle body assembly.

1. Install the new gasket, and new inserts and studs if necessary.
2. Install the throttle body assembly.
3. Install the throttle body retaining nuts and bolts.

Tighten
Tighten the throttle body retaining nuts and bolts to 10 N·m  (7 lb ft).

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.




4. Install the accelerator cable bracket to the throttle body if necessary.

Tighten
Tighten the accelerator cable bracket to 11 N·m  (8 lb ft).

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

5. Install the electrical harness retainer clip from the accelerator control cable bracket.



6. Install the accelerator control (3) and cruise control (1) cables to accelerator cable bracket (4) at throttle body.




Important: The throttle should operate freely without binding between full closed and wide open throttle. Refer to Accelerator Controls .

7. Install the accelerator control (3) and cruise control (1) cables to the throttle body lever.
8. Check for complete throttle opening and closing positions by operating the accelerator pedal. Also check for poor carpet fit under the accelerator pedal.



9. Install the vacuum lines (1) to throttle body as noted on removal.
10. Install the IAC valve, TP sensor, and MAF sensor, electrical connectors (3) to the throttle body (2).



11. Install the air intake tube (1).
12. Refill the radiator to replace the lost coolant.



13. Install the fuel injection sight shield.

Tighten
Tighten the fuel injection sight shield nut to 2 N·m  (18 lb in).

Throttle Body Assembly Replacement Cleaning

1. Remove the intake air duct assembly (1).



2. Remove the snap ring at the air inlet screen (2).
3. Inspect the throttle body bore and throttle valve plate for deposits. It is necessary to open the throttle valve to inspect all surfaces.

Notice: Do not use any solvent that contains Methyl Ethyl Ketone (MEK). This solvent may damage fuel system components.

4. Clean the throttle body bore and throttle valve plate using a clean shop towel with GM Top Engine Cleaner, P/N 1052626 or AC-Delco Carburetor Tune-Up Conditioner, P/N X66-P, or equivalent product.

1. Install the snap ring at the air inlet screen (2).



2. Install the intake air duct assembly (1).