How to Clean Throttle Body 1988-98 GMC Sierra K1500
Created on: 2017-04-28
How to access and clean your throttle body on 96 GMC Sierra K1500 V8 5.7L
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step 1 :Removing the Air Intake
- Unclip the air box latches
- Lift off the air box cover
- Disconnect the intake air temperature sensor electrical connector
- Disconnect the mass air flow sensor electrical connector
- Pop the breather line off the intake hose
- Remove the thumbscrew from the intake
- Lift the Intake up and out
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step 2 :Removing the Throttle Body
- Open the throttle body by hand
- Unclip the cruise control cable from the throttle
- Unclip the throttle cable from the throttle
- Disconnect the throttle position sensor electrical connector
- Disconnect the idle air control electrical connector
- Remove the 10mm nut and bolt from the throttle cable bracket
- Set the throttle cable bracket aside
- Remove the 5.5mm stud from the intake hold down
- Remove the three 8mm bolts from the throttle body
- Remove the Throttle body from the intake manifold
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step 3 :Cleaning the Throttle Body
- Spray the throttle body with throttle body cleaner
- Clean the throttle body with a soft bristle or brass bristle brush
- Wipe off the throttle body with paper towels
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step 4 :Installing the Throttle Body
- Remove the throttle body gasket with a pick
- Press the throttle body gasket into its channel
- Line up the throttle body
- Install the three 8mm bolts for the throttle body
- Tighten the three 8mmbolts to 18 inch-pounds of torque
- Install the 5.5mm hold-down stud
- Connect the throttle cable bracket to the throttle body
- Fasten the 10mm nut and bolt to the throttle cable bracket
- Clip the throttle cable to the throttle
- Clip the cruise cable to the throttle
- Connect the idle air control electrical connector
- Connect the throttle position sensor electrical connector
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step 5 :Installing the Air Intake
- Connect the intake to the throttle body
- Fasten the thumbscrew onto the intake
- Connect the intake hose to the air filter
- Clip the intake hose to the air box
- Connect the mass air flow sensor electrical connector
- Connect the intake air temperature sensor electrical connector
- Line up the air box cover
- Clip on the air box cover
- Connect the breather hose to the intake hose
Tools needed
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Gloves
Socket Extensions
Torque Wrench
5.5mm Socket
Paper Towels
Soft-Bristle Brush
8mm Socket
10mm Socket
Ratchet
Pick
Hi, I'm Mike from 1A Auto. We've been selling auto parts for over 30 years. We're dedicated to delivering quality auto parts, expert customer service, fast and free shipping, all backed by our 100% satisfaction guarantee. Visit us at 1AAuto.com, your trusted source for quality auto parts.
In this video, we're going to be working with out 1996 GMC Sierra. We're going to show you how to remove and replace your vehicle's throttle body on a 5.7 liter, clean it out, and reinstall it. If you like this video please click subscribe. We have a ton more information on this and many other vehicles and if you need parts for your truck, you can follow the link down in the description order 1AAuto.com. Here are the items you'll need for this repair.
Lift up on the latches and remove the upper portion of your air box. Unplug the intake air temp and mass airflow sensors. Pop the breather line off and undo the thumbscrew. Rock the upper part of the intake forward and remove it from the vehicle.
Open the throttle body by hand. Pop off the cruise control cable. Loop the cable and slide it out of the groove. Remove the throttle position sensor connector as well as the idle air control connector.
Remove the 10mm nut and bolt securing the throttle bracket. We'll do this with a 10mm socket and ratchet. Remove the throttle cable bracket and just hang it out of the way.
Remove the intake hold-down stud with a 5-1/2mm socket, ratchet, and extension. Sometimes this will take the throttle body bolt out with it; other times it won't. Ours came out together, but if yours doesn't, this stud will unthread from here, and then you'll want to use an 8mm to remove that.
You'll then remove either the three or two remaining 8mm hold-down bolts for your throttle body. This will depend on whether or not the top stud came out when you removed the intake hold-down bolt like ours did. Then remove your throttle body from the vehicle.
To clean the throttle body, you'll want a soft bristle or brass bristled brush and some throttle body cleaner. What we're going to do is spray that in there, remove as much of that carbon as we can, and then brush off the rest of it. Make sure you spray down into the idle air control valve circuit here as well. Once you've got the bulk of the material out, wipe it down with a paper towel or a clean rag. That's pretty good. However, if you're not satisfied with how clean it is, you can always just keep going using the same processes.
Using a pick, remove the old throttle body gasket. Install your new throttle body gasket and just line it up and press it into the channel. Install your throttle body and the three hold-down bolts. Again, our intake stud is on there so yours may be a little different. We'll then tighten them down with an 8mm socket and ratchet. Torque the bolts to 18 inch-pounds.
Reinstall the throttle cable hold-down bracket. We need a 10mm and a 10mm bolt on the throttle body itself, which we'll then tighten down with our 10mm socket and ratchet. We'll then reinstall the throttle cables and reconnect the IAC and TPS.
Reinstall the intake tube by hooking the tab over the front of the throttle body and setting it back into place. Reinstall the thumbscrew on the stud. Reinstall the tube into the filter as well as locking it into the back of the air box. Reconnect your mass air flow and intake air temp sensors. Drop the lid back into place. Secure the tabs. Install the breather line and you're good to go.
Thanks for watching. Visit us at 1AAuto.com for quality auto parts, fast and free shipping, and the best customer service in the industry.
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